问题描述: Write a function that takes a string of braces, and determines if the order of the braces is valid. It should return true if the string is valid, and false if it's invalid. This Kata is similar to the Valid Parentheses Kata, but introduces new…
在写php时用ajax异步传回的返回数组时是json格式,在js里面处理时有时需要用到键名,此时可以用in来处理 js只有数字索引: <script> var data = new array("你","我","他"): var length = data.length(); var i = 0; for(i;i<length;i++) { alert(data[i]); } </script> ajax异步返回的j…