Javascript每x次迭代在循环内运行一个函数 [英] Javascript run a function inside a loop every x iterations

问题描述

我有一个未知值的变量，它将是一个整数。为此，我们说 var a = 3;

I have a variable of unknown value, it will be an integer. For this sake, lets say var a = 3;

我有一个连续调用的函数：

I have a function that is called continuously:

var a = 3;
function anim() {
        left = parseInt(galleryInner.css('left'), 10);   
        if(Math.abs(left) >= (galleryItem.length * galleryItem.width())){
            galleryInner.css('left', 0);
        }
        galleryInner.animate({left: '-=20' }, 200, anim);

        that.appendEnd();
}

我只想每3次运行this.appendEnd（），因为 a === 3 。

I'd like run this.appendEnd() only every 3 times, because a === 3.

我该怎么做？

推荐答案

实例化一个计数器变量，每次调用anim（）时它都会递增。当

Instantiate a counter variable that increments every time anim() is called. When

counter % a === 0

然后你运行this.appendEnd（）

Then you run this.appendEnd()

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