Consistency

[Steve D via Digitalmars-d]

Well, it provoked a little discussion, and I remain unconvinced.

Why differentiate between 'in' for an associative-array and 'in' 
for an
unordered sequence/array? This implies that the programmer is an 
idiot who
believes that trawling through an unordered sequence is as fast 
as a dictionary
key lookup. Such programmers should not be coding, never went to 
school or are
probably one of those new kids who only fanny-about with 
javascript frameworks.

The point is that python's 'in' or 'index()' .. whatever, give 
the fastest
implementation for the underlying data type. (the same as canFind 
will probably
give the quickest result)
The coder can trust this, and then use the common idiom instead 
of wondering
(as a new D coder) -  is it an 'in'?, a 'canFind'? an 'indexOf'? 
a 'countUntil'?
Is it builtin? Is it in std.algorithm? What's the typical lookup 
for this seq?

The second point is that common idioms across datatypes, make for 
consistent,
simpler intuitive coding, whilst also trusting that the language 
implementors
have spent time optimizing the different underlying 
implementations.

Think about new D coders, or those coming from other languages or 
planets.

Apparently this has all been done to death so, yeah, like 
whatever..

Arguing for inconsistency means you are all retarded :)