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musix-oss/node_modules/core-js/internals/object-iterator.js

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2020-03-03 20:30:50 +00:00
'use strict';
var InternalStateModule = require('../internals/internal-state');
var createIteratorConstructor = require('../internals/create-iterator-constructor');
var has = require('../internals/has');
var objectKeys = require('../internals/object-keys');
var toObject = require('../internals/to-object');
var OBJECT_ITERATOR = 'Object Iterator';
var setInternalState = InternalStateModule.set;
var getInternalState = InternalStateModule.getterFor(OBJECT_ITERATOR);
module.exports = createIteratorConstructor(function ObjectIterator(source, mode) {
var object = toObject(source);
setInternalState(this, {
type: OBJECT_ITERATOR,
mode: mode,
object: object,
keys: objectKeys(object),
index: 0
});
}, 'Object', function next() {
var state = getInternalState(this);
var keys = state.keys;
while (true) {
if (keys === null || state.index >= keys.length) {
state.object = state.keys = null;
return { value: undefined, done: true };
}
var key = keys[state.index++];
var object = state.object;
if (!has(object, key)) continue;
switch (state.mode) {
case 'keys': return { value: key, done: false };
case 'values': return { value: object[key], done: false };
} /* entries */ return { value: [key, object[key]], done: false };
}
});