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<div class="moz-cite-prefix">Thanks<br>
<br>
<br>
<br>
Tony Rogvall schreef op 30-1-2015 om 16:23:<br>
</div>
<blockquote
cite="mid:EC8C855F-CBC6-49FE-9F19-E5BAE2C9AACA@rogvall.se"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
Perfect! Happy hacking.
<div class=""><br class="">
</div>
<div class="">/Tony</div>
<div class=""><br class="">
<div>
<blockquote type="cite" class="">
<div class="">On 30 jan 2015, at 16:11, Roelof Wobben <<a
moz-do-not-send="true" href="mailto:r.wobben@home.nl"
class="">r.wobben@home.nl</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type" class="">
<div bgcolor="#FFFFFF" text="#000000" class="">
<div class="moz-cite-prefix">I read now the erlamg
programming book.<br class="">
<br class="">
Roelof<br class="">
<br class="">
<br class="">
<br class="">
Tony Rogvall schreef op 30-1-2015 om 15:48:<br
class="">
</div>
<blockquote
cite="mid:F257CF67-5209-44D0-ADA8-0AC5C9B78789@rogvall.se"
type="cite" class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class="">
Hi Roelof!
<div class=""><br class="">
</div>
<div class="">Have you ever thought about picking up a
programming book?</div>
<div class=""><br class="">
</div>
<div class="">There is a very good one that is free
and you can read it online.</div>
<div class=""><br class="">
</div>
<div class="">Here is a link: <a
moz-do-not-send="true"
href="http://learnyousomeerlang.com/content"
class="">http://learnyousomeerlang.com/content</a></div>
<div class=""><br class="">
</div>
<div class="">Have fun.</div>
<div class=""><br class="">
</div>
<div class="">/Tony</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
<div class="">
<blockquote type="cite" class="">
<div class="">On 30 jan 2015, at 08:15, Roelof
Wobben <<a moz-do-not-send="true"
href="mailto:r.wobben@home.nl" class="">r.wobben@home.nl</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="moz-cite-prefix"
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);">Rick
Pettit schreef op 29-1-2015 om 22:49:<br
class="">
</div>
<blockquote
cite="mid:8EBFB5ED-2253-413B-B1BB-B13F020D2376@vailsys.com"
type="cite" style="font-family: Helvetica;
font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">Roelof,
<div class=""><br class="">
</div>
<div class="">You don’t need a variable if
you don’t care about the return value of
the function you are calling.</div>
<div class=""><br class="">
</div>
<div class="">To be clear, your problem with
the badmatch is due to Db2 already having
a value assigned which is not equal to the
atom ‘ok’.</div>
<div class=""><br class="">
</div>
<div class="">Try this at the shell to see
what that value is:</div>
<div class=""><br class="">
</div>
<div class=""> <span
class="Apple-converted-space"> </span>Db2.
% don’t forget the period there</div>
<div class=""><br class="">
</div>
<div class="">More than likely it is set to
{ok}, which is what you previously had
db:destroy/1 returning.</div>
<div class=""><br class="">
</div>
<div class="">Since erlang is a
single-assignment language, you cannot
simply assign a different value to Db2
once it is bound.</div>
<div class=""><br class="">
</div>
<div class="">You *can* use syntax that
appears just like an assignment and have
that work, provided the value returned
from the function matches exactly the
value currently bound to the variable on
the left-hand side of the “=“.</div>
<div class=""><br class="">
</div>
<div class="">For example:</div>
<div class=""><br class="">
</div>
<div class="">
<div class="" style="margin: 0px;
font-size: 11px; font-family: Menlo;">
<div class="" style="margin: 0px;">Erlang/OTP
17 [erts-6.2] [source] [64-bit]
[smp:8:8] [async-threads:10] [hipe]
[kernel-poll:false]</div>
<div class="" style="margin: 0px;
min-height: 13px;"><br class="">
</div>
<div class="" style="margin: 0px;">Eshell
V6.2 (abort with ^G)</div>
<div class="" style="margin: 0px;">1>
Db2 = {ok}.</div>
<div class="" style="margin: 0px;">{ok}</div>
<div class="" style="margin: 0px;">2>
Db2.</div>
<div class="" style="margin: 0px;">{ok}</div>
<div class="" style="margin: 0px;">3>
Db2 = {ok}.</div>
<div class="" style="margin: 0px;">{ok}</div>
<div class="" style="margin: 0px;">4>
Db2 = ok.</div>
<div class="" style="margin: 0px;">**
exception error: no match of right
hand side value ok</div>
<div class="" style="margin: 0px;">5>
Db2 = {ok}.</div>
<div class="" style="margin: 0px;">{ok}</div>
<div class="" style="margin: 0px;">6>
f(Db2).</div>
<div class="" style="margin: 0px;">ok</div>
<div class="" style="margin: 0px;">7>
Db2 = ok.</div>
<div class="" style="margin: 0px;">ok</div>
<div class="" style="margin: 0px;">8>
Db2 = {ok}.</div>
<div class="" style="margin: 0px;">**
exception error: no match of right
hand side value {ok}</div>
<div class="" style="margin: 0px;">9>
Db2 = ok.</div>
<div class="" style="margin: 0px;">ok</div>
<div class=""><br class="">
</div>
</div>
</div>
<div class="">===</div>
<div class=""><br class="">
</div>
<div class="">Here’s what’s going on there:</div>
<div class=""><br class="">
</div>
<div class="">1. I bound the value {ok} to
the variable Db2</div>
<div class=""><br class="">
</div>
<div class="">2. I check the value of Db2</div>
<div class=""><br class="">
</div>
<div class="">3. I “assign” Db2 the same
value — this isn’t really an assignment
now, it is a match, and in this case both
the left-hand side and right-hand side
have same value, so match succeeds</div>
<div class=""><br class="">
</div>
<div class="">4. I attempt to assign Db2 a
different value—since Db2 was bound to
{ok} and the right-hand side now has ‘ok’,
that match fails—thus the match error</div>
<div class=""><br class="">
</div>
<div class="">5. I “assign” Db2 the original
value — again, this isn’t really an
assignment, it is a match, which again
succeeds for same reason as (3) above</div>
<div class=""><br class="">
</div>
<div class="">6. I use the f() function at
the shell to “forget” about the value
previously bound to Db2, effectively
making Db2 unbound to any value (and as
such it can now be assigned any value)</div>
<div class=""><br class="">
</div>
<div class="">7. I assign a different value,
this time ‘ok’, to Db2 — no errors that
time, because it was an assignment, not a
match</div>
<div class=""><br class="">
</div>
<div class="">8. I attempt to match Db2 with
the previous value—and there’s that match
error again</div>
<div class=""><br class="">
</div>
<div class="">9. I “assign” Db2 the new
value again—now it is a match, and the
match is good so no error</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Does that make sense now?</div>
<div class=""><br class="">
</div>
<div class="">-Rick</div>
<div class=""><br class="">
<div class="">
<blockquote type="cite" class="">
<div class="">On Jan 29, 2015, at 1:53
PM, Roelof Wobben <<a
moz-do-not-send="true"
href="mailto:r.wobben@home.nl"
class="">r.wobben@home.nl</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div bgcolor="#FFFFFF"
text="#000000" class="">
<div class="moz-cite-prefix">I did
some trail and error and saw
this :<br class="">
<br class="">
c(db).
<div data-row="2"
class="terminal-row">{ok,db} </div>
<div data-row="3"
class="terminal-row">14> Db1 = db:new(). </div>
<div data-row="4"
class="terminal-row">[] </div>
<div data-row="5"
class="terminal-row">15> Db2 = db:destroy(Db1). </div>
<div data-row="6"
class="terminal-row">** exception error: no match of right hand side value ok </div>
<div data-row="7"
class="terminal-row">16> db:destroy(Db1). </div>
ok <span
class="Apple-converted-space"> </span><br
class="">
<br class="">
So it seems you do not have to
use a variable when destroying.<span
class="Apple-converted-space"> </span><br
class="">
<br class="">
Roelof<br class="">
<br class="">
<br class="">
<br class="">
Rick Pettit schreef op 29-1-2015
om 20:40:<br class="">
</div>
<blockquote
cite="mid:20C06585-CD06-4404-9EB3-D5D5529580BD@vailsys.com"
type="cite" class="">Oops, meant
to add that as for the exception
error no match of right hand
side value ok, is it possible
you previously bound the
variable Db2 at the shell?
<div class=""><br class="">
</div>
<div class="">If so, then though
what you have appears to be an
assignment, it is actually a
match, and one which has
failed because Db2 has been
bound to a value other than
‘ok’.</div>
<div class=""><br class="">
</div>
<div class="">You can do the
following if you want the
shell to “forget” about Db2’s
previous value, effectively
unbinding it and allowing for
a subsequent assignment to a
different value:</div>
<div class=""><br class="">
</div>
<div class=""> <span
class="Apple-converted-space"> </span>f(Db2).</div>
<div class=""><br class="">
</div>
<div class="">-Rick</div>
<div class=""><br class="">
<div class="">
<blockquote type="cite"
class="">
<div class="">On Jan 29,
2015, at 1:38 PM, Rick
Pettit <<a
moz-do-not-send="true"
href="mailto:rpettit@vailsys.com" class="">rpettit@vailsys.com</a>>
wrote:</div>
<br
class="Apple-interchange-newline">
<div class="">
<div class=""
style="word-wrap:
break-word;
-webkit-nbsp-mode:
space;
-webkit-line-break:
after-white-space;">Your
db:destroy/1 function
doesn’t use the
parameter passed
in—thus the error
about ‘Db’ being
unused.
<div class=""><br
class="">
</div>
<div class="">Since
nothing is actually
being “destroyed”
there, you have a
couple options:</div>
<div class=""><br
class="">
</div>
<div class=""> <span
class="Apple-converted-space"> </span>(1)
modify destroy so it
takes no arguments
(kind of
pointless—might as
well do away with
the function
altogether)</div>
<div class=""><br
class="">
</div>
<div class=""> <span
class="Apple-converted-space"> </span>(2)
rewrite the function
head like so to
inform the compiler
you don’t care to
use Db in the
function body:</div>
<div class=""><br
class="">
</div>
<div class="">destroy(_Db)
-></div>
<div class=""> <span
class="Apple-converted-space"> </span>ok.</div>
<div class=""><br
class="">
</div>
<div class=""><br
class="">
</div>
<div class=""><br
class="">
</div>
<div class="">-Rick</div>
<div class=""><br
class="">
<div class="">
<blockquote
type="cite"
class="">
<div class="">On
Jan 29, 2015,
at 1:25 PM,
Roelof Wobben
<<a
moz-do-not-send="true"
href="mailto:r.wobben@home.nl" class="">r.wobben@home.nl</a>> wrote:</div>
<br
class="Apple-interchange-newline">
<div class="">
<div
class="moz-cite-prefix"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">Rick
Pettit schreef
op 29-1-2015
om 20:16:<br
class="">
</div>
<blockquote
cite="mid:55690AB8-242D-4061-BC51-97846B0E76DB@vailsys.com"
type="cite"
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">Comments
inline below.
<div class=""><br
class="">
</div>
<div class="">-Rick</div>
<div class=""><br
class="">
<div class="">
<blockquote
type="cite"
class="">
<div class="">On
Jan 29, 2015,
at 1:14 PM,
Roelof Wobben
<<a
moz-do-not-send="true"
href="mailto:r.wobben@home.nl" class="">r.wobben@home.nl</a>> wrote:</div>
<br
class="Apple-interchange-newline">
<div class="">
<div
bgcolor="#FFFFFF"
text="#000000"
class="">
<div
class="moz-cite-prefix"><a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:e@bestmx.net">e@bestmx.net</a><span
class="Apple-converted-space"> </span>schreef op 29-1-2015 om 20:06:<br
class="">
</div>
<blockquote
cite="mid:54CA84BD.6090908@bestmx.net"
type="cite"
class="">
<blockquote
type="cite"
class="">So i
have to make a
tuple of the
data and add
it in a list.<span
class="Apple-converted-space"> </span><br class="">
<br class="">
I thought I
could do
something like
this :<span
class="Apple-converted-space"> </span><br
class="">
<br class="">
write(Key,
Data, Db)
-><span
class="Apple-converted-space"> </span><br
class="">
<span
class="Apple-converted-space"> </span>[
{key, data} |
Db ]<span
class="Apple-converted-space"> </span><br
class="">
<br class="">
but then I see
some error
messages.<span
class="Apple-converted-space"> </span><br class="">
</blockquote>
<br class="">
what messages?<span
class="Apple-converted-space"> </span><br class="">
<br class="">
as far as i
can _theorize_<span
class="Apple-converted-space"> </span><br class="">
the most
probably your
Db is not a
list, and it
should be.<span
class="Apple-converted-space"> </span><br class="">
_______________________________________________<span
class="Apple-converted-space"> </span><br
class="">
erlang-questions
mailing list<span
class="Apple-converted-space"> </span><br class="">
<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a><span
class="Apple-converted-space"> </span><br class="">
<a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://erlang.org/mailman/listinfo/erlang-questions">http://erlang.org/mailman/listinfo/erlang-questions</a><span
class="Apple-converted-space"> </span><br class="">
<br class="">
</blockquote>
<br class="">
Here is my
code so far :<span
class="Apple-converted-space"> </span><br class="">
<br class="">
-module(db).<br
class="">
<br class="">
-export([new/0,
destroy/1]).<br
class="">
<br class="">
new() -><br
class="">
<span
class="Apple-converted-space"> </span>[].<br
class="">
<br class="">
destroy(Db)
-><br
class="">
<span
class="Apple-converted-space"> </span>{ok}.<br
class="">
</div>
</div>
</blockquote>
<div class=""><br
class="">
</div>
<div class="">Why
are you
returning a
tuple here
instead of
simply ‘ok’ ?</div>
<br class="">
</div>
</div>
</blockquote>
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">Because
of this output
:<span
class="Apple-converted-space"> </span></span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<div
data-row="1"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">10> c(db). </div>
<div
data-row="2"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">db.erl:8: Warning: variable 'Db' is unused </div>
<div
data-row="3"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">{ok,db} </div>
<div
data-row="4"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">11> Db1 = db:new(). </div>
<div
data-row="5"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">[] </div>
<div
data-row="6"
class="terminal-row"
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">12> Db2 = db:destroy(Db1). </div>
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">** exception error: no match of right hand side value ok <span
class="Apple-converted-space"> </span></span><br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">When
I do this :<span
class="Apple-converted-space"> </span></span><br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">-module(db).</span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">-export([new/0,
destroy/1,
write/3]).</span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">new()
-></span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;"> <span
class="Apple-converted-space"> </span>[].</span><br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">destroy(Db)
-></span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;"> <span
class="Apple-converted-space"> </span>ok.</span><br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">write(Key,
Element, Db)
-></span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;"> <span
class="Apple-converted-space"> </span>[ {Key, Element} | Db ].<span
class="Apple-converted-space"> </span></span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">Roelof</span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<br class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">_______________________________________________</span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<span class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255); float:
none; display:
inline
!important;">erlang-questions
mailing list</span><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<a
moz-do-not-send="true"
href="mailto:erlang-questions@erlang.org" class="" style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">erlang-questions@erlang.org</a><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
<a
moz-do-not-send="true"
href="http://erlang.org/mailman/listinfo/erlang-questions" class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">http://erlang.org/mailman/listinfo/erlang-questions</a><br
class=""
style="font-family:
Helvetica;
font-size:
12px;
font-style:
normal;
font-variant:
normal;
font-weight:
normal;
letter-spacing:
normal;
line-height:
normal;
orphans: auto;
text-align:
start;
text-indent:
0px;
text-transform:
none;
white-space:
normal;
widows: auto;
word-spacing:
0px;
-webkit-text-stroke-width:
0px;
background-color:
rgb(255, 255,
255);">
</div>
</blockquote>
</div>
<br class="">
</div>
</div>
</div>
</blockquote>
</div>
<br class="">
</div>
</blockquote>
<br class="">
</div>
_______________________________________________<br class="">
erlang-questions mailing list<br
class="">
<a moz-do-not-send="true"
href="mailto:erlang-questions@erlang.org"
class="">erlang-questions@erlang.org</a><br
class="">
<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://erlang.org/mailman/listinfo/erlang-questions">http://erlang.org/mailman/listinfo/erlang-questions</a><br
class="">
</div>
</blockquote>
</div>
<br class="">
</div>
</blockquote>
<br style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<span style="font-family: Helvetica;
font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); float:
none; display: inline !important;" class="">Thanks
all, this problem is also solved.</span><br
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<br style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<span style="font-family: Helvetica;
font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); float:
none; display: inline !important;" class="">Roelof</span><br
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<br style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<span style="font-family: Helvetica;
font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); float:
none; display: inline !important;" class="">_______________________________________________</span><br
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<span style="font-family: Helvetica;
font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: normal;
orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); float:
none; display: inline !important;" class="">erlang-questions
mailing list</span><br style="font-family:
Helvetica; font-size: 12px; font-style:
normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; line-height:
normal; orphans: auto; text-align: start;
text-indent: 0px; text-transform: none;
white-space: normal; widows: auto;
word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<a moz-do-not-send="true"
href="mailto:erlang-questions@erlang.org"
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">erlang-questions@erlang.org</a><br
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">
<a moz-do-not-send="true"
href="http://erlang.org/mailman/listinfo/erlang-questions"
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
class="">http://erlang.org/mailman/listinfo/erlang-questions</a><br
style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing:
normal; line-height: normal; orphans: auto;
text-align: start; text-indent: 0px;
text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"
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_______________________________________________<br
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erlang-questions mailing list<br class="">
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