张学亮

摘要： 数组，函数concat将参数列表连接到原数组后面形成一个新的数组并返回，原有数组不受影响。 var arr = ["a","b","c"];var arr1 = arr.concat("d","e");//arr1 = ["a","b","c","d","e"]join以指定的字符作为分割符，将数组 阅读全文