convert a tuple or list to 4 byte integer value

Serge Aleynikov <>
Fri Aug 5 22:04:09 CEST 2005


Try this:

10> <<I:32>> = <<47,80,18,222>>.
<<47,80,18,222>>
11> I.
793776862
12> <<I:32>>.
<<47,80,18,222>>

Serge

MEENA SELVAM wrote:
> I have an IPaddress tuple {47,80,18,222} or after
> conversion using tuple_to_list I have [47,80,18,222]
> 
> But the snmp object type to hold this ip address is
> 'IpAddress' which is 4 bytes of integer.
> 
> I tried, list_to_integer[47,80,18,222] which gives a
> badarg error, 
> 
> 1> list_to_integer([47,80,18,222]).
> ** exited:
> {badarg,[{erlang,list_to_integer,[[47,80,18,222]]},
>                     {erl_eval,do_apply,5},
>                     {shell,exprs,6},
>                     {shell,eval_loop,3}]} **
> 
> =ERROR REPORT==== 5-Aug-2005::12:02:17 ===
> Error in process <0.30.0> with exit value:
> {badarg,[{erlang,list_to_integer,[[47,80,18,222]]},{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}
> 
> 
> But actually what I need is, not the ascii equivalent.
> I need to convert this to 4 bytes one with 47, one
> with 80
> 
> How can I do this?
> 
> meena



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