Perl's lack of 'in' keyword
iainspeed at gmail.com
Thu Oct 9 12:11:15 BST 2008
On 9 Oct 2008, at 11:51 am, Andy Armstrong wrote:
> On 9 Oct 2008, at 01:39, Iain Barnett wrote:
>> if $a ~~ $b #this could mean several things
> A smart match between two scalars. Clear.
>> if $a in $b #it is clear what this means
> One scalar is in another? WTF?
What does smart match do if you pass it an array/hash/object ref? If
it matches against the scalar part then it's not a very smart match,
>> if a in b #this is even better IMO
> Dunno what a and b are - so who knows what it does?
> Which is not, of course, to say that you're wrong - but that
> readability is - to some extent - in the eye of the beholder.
> Andy Armstrong, Hexten
The "in" implies that "b" is a collection of some sort and "a" is a
single value of the type that b is holding.
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