Sha256: cffef599db54169adbfed37b213d22a7ea4bdd43cf5c44cbc8a04302238dae11
Contents?: true
Size: 1.24 KB
Versions: 62
Compression:
Stored size: 1.24 KB
Contents
/* */
'use strict';
var ctx = require('./$.ctx'),
$def = require('./$.def'),
toObject = require('./$.to-object'),
call = require('./$.iter-call'),
isArrayIter = require('./$.is-array-iter'),
toLength = require('./$.to-length'),
getIterFn = require('./core.get-iterator-method');
$def($def.S + $def.F * !require('./$.iter-detect')(function(iter) {
Array.from(iter);
}), 'Array', {from: function from(arrayLike) {
var O = toObject(arrayLike),
C = typeof this == 'function' ? this : Array,
mapfn = arguments[1],
mapping = mapfn !== undefined,
index = 0,
iterFn = getIterFn(O),
length,
result,
step,
iterator;
if (mapping)
mapfn = ctx(mapfn, arguments[2], 2);
if (iterFn != undefined && !(C == Array && isArrayIter(iterFn))) {
for (iterator = iterFn.call(O), result = new C; !(step = iterator.next()).done; index++) {
result[index] = mapping ? call(iterator, mapfn, [step.value, index], true) : step.value;
}
} else {
for (result = new C(length = toLength(O.length)); length > index; index++) {
result[index] = mapping ? mapfn(O[index], index) : O[index];
}
}
result.length = index;
return result;
}});
Version data entries
62 entries across 31 versions & 1 rubygems