摘要:
js:闭包 var getNum; function getCounter() { var n = 1; var inner = function () {return n++; } console.log(n); return inner; } //第一步 getNum = getCounter( 阅读全文
摘要:
js:filter过滤数组元素 //1.数组取奇数 var arr = [1,2,3,4,5]; var r = arr.filter(function(x){ return x % 2 !== 0; }); //2.删除空字符串 var arr = ['A', 'B', 'C', '', ' ', 阅读全文