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JS 数组删除元素
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// Array Remove - By John Resig (MIT Licensed) | |
Array.prototype.remove = function(from, to) { | |
var rest = this.slice((to || from) + 1 || this.length); | |
this.length = from < 0 ? this.length + from : from; | |
return this.push.apply(this, rest); | |
}; | |
// 移除数组中的第二项 | |
// array.remove(1); | |
// 移除数组中的倒数第二项 | |
// array.remove(-2); | |
// 移除数组中的第二项和第三项(从第二项开始,删除2个元素) | |
// array.remove(1,2); | |
// 移除数组中的最后一项和倒数第二项(数组中的最后两项) | |
// array.remove(-2,-1); | |
// 原理:通过元素在数组的下标位置来定位删除 |
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