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Contents
// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
var path = require('../internals/path');
var aFunction = require('../internals/a-function');
var anObject = require('../internals/an-object');
var toObject = require('../internals/to-object');
var createIteratorProxy = require('../internals/iterator-create-proxy');
var getIteratorMethod = require('../internals/get-iterator-method');
var Iterator = path.Iterator;
var IteratorProxy = createIteratorProxy(function (arg) {
var result = anObject(this.next.call(this.iterator, arg));
var done = this.done = !!result.done;
if (!done) return result.value;
}, true);
$({ target: 'Iterator', stat: true }, {
from: function from(O) {
var object = toObject(O);
var usingIterator = getIteratorMethod(object);
var iterator;
if (usingIterator != null) {
iterator = aFunction(usingIterator).call(object);
if (iterator instanceof Iterator) return iterator;
} else {
iterator = object;
} return new IteratorProxy({
iterator: iterator
});
}
});
Version data entries
17 entries across 16 versions & 6 rubygems