如何删除未定义并创建新的数组Javascript? [英] How to remove undefined and create a new array Javascript?

问题描述

我有以下数组:

var imagesList = [undefined x 1, cars.jpg, undefined x 1, boats.jpg];

如何过滤出未定义的内容?所以我可以按如下方式获得它:

How do I filter out the undefined? so I can get it as follows:

var imagesShow = [cars.jpg, boats.jpg];

我还没有找到太多有关使用javascript消除数组中未定义内容的文档.

I have not found much documentation on getting rid of undefined in an array using javascript.

推荐答案

您可以使用

You could use Array#filter with Boolean as callback for truthy values.

var imagesList = [undefined, 'cars.jpg', undefined, 'boats.jpg'],
    imagesShow = imagesList.filter(Boolean);
    
console.log(imagesShow);

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