<span style="font-family: Arial; font-size: 13px;">Thanks for your response! I did find interesting the <module name>:<type any word>() trick. Didn't know about it!<br><br>Thanks,<br>Alex<br><br>On 4/17/2018 at 9:27 PM, "Fernando Benavides" <elbrujohalcon@gmail.com> wrote:<blockquote style="border-left:solid 1px #ccc;margin-left:10px;padding-left:10px;"><div><div dir="auto" style="color:#313131;word-spacing:1px;">Well... You might not realize but you do know _a_ function: your_module:module_info/0 always exists, for every module ;)</div><div dir="auto" style="color:#313131;word-spacing:1px;"><br></div><div dir="auto" style="color:#313131;word-spacing:1px;">Also... Just trying to evaluate _any_ function, loads the module. That's why instead of loading modules manually, when in the shell, I tend to write the module name and :, press tab, if nothing pops up, I type x(). and press enter. Either the module loads and I have autocomplete next time I press tab, or I can't load the module.</div><div dir="auto" style="color:#313131;word-spacing:1px;"><br></div><div dir="auto" style="color:#313131;word-spacing:1px;">I bet one day I'll find a module that defines x/0 and I will be in trouble...</div><div dir="auto" style="color:#313131;word-spacing:1px;"><br></div><div class="gmail_quote"><div>On Tue, 17 Apr 2018 at 19:18 Alex Alvarez <<a>alex@xbasics.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;margin:0 0 0 .8ex;"><span style="font-family:Arial;font-size:13px;">Thanks Joe! LOL!!! Might sound silly, but it's very useful to be able to load/reload modules manually. At the very least, it'd be great to at least get something like {error, module_loaded}, instead of the current "error report" message<br><br>Ok, so, why don't I just enter a <module name>:<function name> and allow the module to autoload. That's great for source code, but not that great in the command line. The problem is that I, as I suppose most folks, don't know the function names (or even a function name) in every module, which is why I tend to manually load them when I'm in Erlang's REPL. As we know, once a module is loaded, you can type the module name, press the <TAB> key and get a list of the function names + arity. This is very powerful. If you don't know the exact name of a function, but do know the name of a few modules where it might be, you can try loading them, pressing <TAB> and see if you can find it before having to consult the documentation.<br><br>Thanks,<br>Alex</span><span style="font-family:Arial;font-size:13px;"><br><br><br>On 4/16/2018 at 9:55 AM, "Joe Armstrong" <<a>erlang@gmail.com</a>> wrote:<blockquote style="border-left:solid 1px #ccc;margin-left:10px;padding-left:10px;">I see :-)<br><br>But why I ask do you do "l(math)" ?<br><br>This loads or reloads a module - but modules are autoloaded on demand<br>the first time the module<br>is called, so really there is almost [1] no need to do ever do this.<br><br>Cheers<br><br>/Joe<br><br>[1] there is actually but the use cases are rather obscure<br><br><br><br><br>On Mon, Apr 16, 2018 at 4:24 AM, Alex Alvarez <<a>alex@xbasics.com</a>> wrote:<br>> Thanks for your reply! I can certainly understand that and appreciate the<br>> system would be letting me know if I was trying to do that. But the issue<br>> is that I was not trying to load any code of mine with the same module name,<br>> I just tried reloading the same (e.g., math) module.<br>><br>> Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:2:2] [ds:2:2:10]<br>> [async-threads:10] [hipe] [kernel-poll:false]<br>><br>> Eshell V9.3 (abort with ^G)<br>> 1> l(math).<br>> {module,math}<br>> 2> l(math).<br>> {error,sticky_directory}<br>> 3><br>> =ERROR REPORT==== 15-Apr-2018::22:09:00 ===<br>> Can't load module 'math' that resides in sticky dir<br>><br>> As mentioned in my last email, the issue seems to be with the fact that the<br>> module was not marked old...<br>><br>> 3> code:purge(math).<br>> false<br>><br>> Now, I just thought that c:l() would load and reload any module regardless,<br>> but that doesn't seem to be the case.<br>><br>> <a target="_blank" href="http://erlang.org/doc/man/c.html#l-1" onclick="window.open('http://erlang.org/doc/man/c.html#l-1');return false;">http://erlang.org/doc/man/c.html#l-1</a><br>> <a target="_blank" href="http://erlang.org/doc/man/code.html#purge-1" onclick="window.open('http://erlang.org/doc/man/code.html#purge-1');return false;">http://erlang.org/doc/man/code.html#purge-1</a><br>><br>> Thanks,<br>> Alex<br>><br>><br>><br>> On 4/13/2018 at 4:26 PM, "Joe Armstrong" <<a>erlang@gmail.com</a>> wrote:<br>><br>> The module called 'math' is a pre-defined system module, and<br>> redefining it might have<br>> unpleasant and unpredictable consequences - so you really should not<br>> do this unless you<br>> know exactly what you are doing. Best is to just change the name.<br>><br>> If you know what you're doing you can call unstick_dir on the<br>> directory where math.beam was loaded from<br>> and then you will be able to change the code - again this is not a<br>> good idea if you don't<br>> really understand the consequences of doing this.<br>><br>> System modules are 'sticky' by default to stop you from accidentally<br>> shooting yourself in the foot.<br>><br>> If you get this warning just change the module name.<br>><br>> Cheers<br>><br>> /Joe<br>><br>> On Fri, Apr 13, 2018 at 7:13 PM, Alex Alvarez <<a>alex@xbasics.com</a>> wrote:<br>>> Sorry if this was already asked and I missed it... While using v20.3.2,<br>>> after I load a module...<br>>><br>>> 11> l(math).<br>>> {module,math}<br>>><br>>> ...if I try to reload it again with the same command...<br>>><br>>> 12> l(math).<br>>><br>>> =ERROR REPORT==== 13-Apr-2018::13:09:15 ===<br>>> Can't load module 'math' that resides in sticky dir<br>>> {error,sticky_directory}<br>>><br>>> ...I get this error message. It's not particular to any module. From the<br>>> error, there seems to be a problem with a stcky bit somewhere. Although I<br>>> don't remember having this problem before, who knows, maybe it's just my<br>>> install. Has anyone run into this issue recently?<br>>><br>>> Thanks,<br>>> Alex<br>>><br>>> _______________________________________________<br>>> erlang-questions mailing list<br>>> <a>erlang-questions@erlang.org</a><br>>> <a target="_blank" href="http://erlang.org/mailman/listinfo/erlang-questions" onclick="window.open('http://erlang.org/mailman/listinfo/erlang-questions');return false;">http://erlang.org/mailman/listinfo/erlang-questions</a><br>>></blockquote></span>_______________________________________________<br>
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</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">elbrujohalcon @ iPhone</div></div></blockquote></span>