Rick Waldron wrote:
On Wed, Dec 12, 2012 at 1:59 AM, Axel Rauschmayer <[email protected]
<mailto:[email protected]>> wrote:
I would still love to have something like that in ES6 (loosely
similar to String.prototype.repeat). Once you have that, you can
e.g. use Array.prototype.map to do more things.
Two possibilities:
- Array.repeat(undefined, 3) -> [ undefined, undefined, undefined ]
- [ undefined ].repeat(3) -> [ undefined, undefined, undefined ]
Array Comprehensions!
This is probably wrong, so treat it more like an idea and less like a
matter of fact:
[ undefined for x of new Array(3) ].map( v => ... );
[ undefined for x of [0,0,0] ].map( v => ... );
Well, for the few occasions I did something in Python, I did it this
way, but with range(3) in place of new Array(3).
If it's not a sin to do it this way, then please allow it by adding
range (however called) in ES6.
Rick
Herby
P.S.: Or allow it some different way, it depends. integers().limit(3) is
fine, too; if having infinite generator of increasing integers and
decorator stopping after n items is better way.
P.P.S.: This open lots of ways. It can as well be
[...infiniteStreamOf(undefined).limit(3)] (lotsOf(...) is shorter).
P.P.P.S.: That said, `looping(a,b,c)` generating a,b,c in a neverending
loop (for any number of parameters) would be a good building block.
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