[asterisk-users] Can someone give a plain english explanation of the HASH function?

[Eric Chamberlain]

An Asterisk specific, oversimplified, reductionist example would be  
fine.

On Sep 13, 2008, at 5:47 PM, Alex Balashov wrote:

> There is no "plain English" explanation that is not made with  
> reference
> to the concept of a hash, which is an algorithmic and programmatic
> technique.  The HASH() function is designed for people that understand
> what hashing is and need to make use of it.
>
> So, the answer is, "it provides a hashing mechanism to the user."
>
> The simplest way to discover what hashing is would be to educate
> yourself about hash tables and associative arrays (which provide
> high-level, usually type-safe syntactical bindings around the use of
> hash tables) in other contexts, after which it should be clear.
> Soliciting any sort of Asterisk-specific explanation is going to give
> you an incomplete, oversimplified, and/or reductionist viewpoint.
>
> I would start here:
>
>   http://en.wikipedia.org/wiki/Hash_function
>
> Cheers,
>
> -- Alex
>
>
> Eric Chamberlain wrote:
>
>> Can someone explain what the HASH function does and how to use it?
>>
>>
>>   -= Info about function 'HASH' =-
>>
>> [Syntax]
>> HASH(hashname[,hashkey])
>>
>> [Synopsis]
>> Implementation of a dialplan associative array
>>
>> [Description]
>> In two argument mode, gets and sets values to corresponding keys
>> within a named
>> associative array.  The single-argument mode will only work when
>> assigned to from
>> a function defined by func_odbc.so.
>
> -- 
> Alex Balashov
> Evariste Systems
> Web    : http://www.evaristesys.com/
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--
Eric Chamberlain
Founder
RF.com
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