2010/10/15 Daniel-Constantin Mierla <mico...@gmail.com>:
> Even we like it or not, non-type-safety languages such as perl, shell or
> python rule the sys admin world.
Said that I would like to expose a proposal for comparisons:
1) Never do implicit type conversion. This is, a string is NEVER equal
to an integer:
if "0" == 0 => false
if "" == 0 => false
if "asdasd" == 0 => false
2) An integer is NEVER equal to a string:
if 0 == "0" => false
if 0 == "" => false
if 0 == "asdasd" => false
3) Integer 0 is not equal to NULL:
if 0 == NULL => false
4) Empty string is not equal to NULL:
if "" == NULL => false
5) Integer 0 is true:
if 0 => true
6) Empty string is true:
if "" => true
The only point I'm not sure is the last one (6). In some high level
languages (as Ruby) checking an empty string returns true. However in
other languages (as ActionScript) it returns false.
--
Iñaki Baz Castillo
<i...@aliax.net>
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