There are no keys in JavaScript arrays. Use objects for that purpose. var obj = {}; $.getJSON("displayjson.php",function (data) ... ... <看更多>

後來在ES5 新增了 Object.keys() ，終於可以擺脫 for-in 陳述句了，終於可以讓JS 物件(間接) 使用Array method 了！ Object.keys() 可直接取得 ... ... <看更多>

【JS Tricks】Array.push vs Key-Value based addition. 83 views. 6. 0. Share. Save. Report. Creat Code Build. 2 ... ... <看更多>

Basically after reading over the code, I interpret that the conditional (i.e. !obj[key].push ) checks if the value at the given key is not an array. ... <看更多>

Prior to ES6, when you need to map keys to values, you often use an object, ... that contains an array of [key, value] for each element in the map object. ... <看更多>

You can provide a single event string , array of events, array of event types ... To trigger a build anytime you push a JavaScript file, you can use a ... ... <看更多>