'use strict';
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var $ = require('../internals/export');
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var anObject = require('../internals/an-object');
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var anObjectOrUndefined = require('../internals/an-object-or-undefined');
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var createProperty = require('../internals/create-property');
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var call = require('../internals/function-call');
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var uncurryThis = require('../internals/function-uncurry-this');
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var getBuiltIn = require('../internals/get-built-in');
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var propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');
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var getIteratorFlattenable = require('../internals/get-iterator-flattenable');
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var getModeOption = require('../internals/get-mode-option');
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var iteratorCloseAll = require('../internals/iterator-close-all');
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var iteratorZip = require('../internals/iterator-zip');
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var create = getBuiltIn('Object', 'create');
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var ownKeys = getBuiltIn('Reflect', 'ownKeys');
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var push = uncurryThis([].push);
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var THROW = 'throw';
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// `Iterator.zipKeyed` method
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// https://github.com/tc39/proposal-joint-iteration
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$({ target: 'Iterator', stat: true }, {
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zipKeyed: function zipKeyed(iterables /* , options */) {
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anObject(iterables);
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var options = arguments.length > 1 ? anObjectOrUndefined(arguments[1]) : undefined;
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var mode = getModeOption(options);
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var paddingOption = mode === 'longest' ? anObjectOrUndefined(options && options.padding) : undefined;
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var iters = [];
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var padding = [];
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var allKeys = ownKeys(iterables);
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var keys = [];
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var propertyIsEnumerable = propertyIsEnumerableModule.f;
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var i, key, value;
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for (i = 0; i < allKeys.length; i++) try {
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key = allKeys[i];
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if (!call(propertyIsEnumerable, iterables, key)) continue;
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value = iterables[key];
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if (value !== undefined) {
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push(keys, key);
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push(iters, getIteratorFlattenable(value, true));
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}
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} catch (error) {
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return iteratorCloseAll(iters, THROW, error);
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}
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var iterCount = iters.length;
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if (mode === 'longest') {
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if (paddingOption === undefined) {
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for (i = 0; i < iterCount; i++) push(padding, undefined);
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} else {
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for (i = 0; i < keys.length; i++) {
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try {
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value = paddingOption[keys[i]];
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} catch (error) {
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return iteratorCloseAll(iters, THROW, error);
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}
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push(padding, value);
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}
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}
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}
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return iteratorZip(iters, mode, padding, function (results) {
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var obj = create(null);
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for (var j = 0; j < iterCount; j++) {
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createProperty(obj, keys[j], results[j]);
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}
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return obj;
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});
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}
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});
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