Sha256: f223492b8431afa91e084ecf3a8bbf84fea5f85763c7fecc19b2e11b46ac85be
Contents?: true
Size: 1.18 KB
Versions: 7
Compression:
Stored size: 1.18 KB
Contents
var toObject = require('../internals/to-object');
var toLength = require('../internals/to-length');
var getIteratorMethod = require('../internals/get-iterator-method');
var isArrayIteratorMethod = require('../internals/is-array-iterator-method');
var bind = require('../internals/bind-context');
var aTypedArrayConstructor = require('../internals/array-buffer-view-core').aTypedArrayConstructor;
module.exports = function from(source /* , mapfn, thisArg */) {
var O = toObject(source);
var argumentsLength = arguments.length;
var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
var mapping = mapfn !== undefined;
var iteratorMethod = getIteratorMethod(O);
var i, length, result, step, iterator;
if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
iterator = iteratorMethod.call(O);
O = [];
while (!(step = iterator.next()).done) {
O.push(step.value);
}
}
if (mapping && argumentsLength > 2) {
mapfn = bind(mapfn, arguments[2], 2);
}
length = toLength(O.length);
result = new (aTypedArrayConstructor(this))(length);
for (i = 0; length > i; i++) {
result[i] = mapping ? mapfn(O[i], i) : O[i];
}
return result;
};
Version data entries
7 entries across 7 versions & 2 rubygems