On Tuesday, 1 May 2012 at 14:31:25 UTC, Alex Rønne Petersen
wrote:
1) So because some people might use a feature incorrectly due
to lack of knowledge in algorithms and data structures, we
should cripple the language?
It's not crippling the language. Nothing prevents you from
writing a loop.
Or using a library find function that does the same thing. But
the name "find" gives you a hint that it's not magical and that
it has a cost, while with "if( foo in bar)", it is too easy to
forget that we are actually potentially performing an O(n)
operation. In an AA, the 'in' keyword performs a O(1) operation,
so that's ok to use it as a syntactic sugar.
