JavaScrip笔记1

定时执行

window.setInterval(function(){
          alert("123")
}, 500);

数组去重

function removeDuplicatedItem(ar) {
    var ret = [];

    ar.forEach(function(e, i, ar) {
        if (ar.indexOf(e) === i) {
            ret.push(e);
        }
    });

    return ret;
}

数组按值删除项

Array.prototype.deleteElementByValue = function(varElement)
{
    var numDeleteIndex = -1;
    for (var i=0; i<this.length; i++)
    {
        // 严格比较，即类型与数值必须同时相等。
        if (this[i] === varElement)
        {
            this.splice(i, 1);
            numDeleteIndex = i;
            break;
        }
    }
    return numDeleteIndex;
}

标签：function,笔记,numDeleteIndex,ar,JavaScrip,数组,var,ret
来源： https://blog.csdn.net/lftxd1/article/details/111690717