如何检查Javascript中所有数组值是否为空 [英] How to check if all array values are blank in Javascript

问题描述

我有一个像这样的数组:

I have an array like:

["", "", "", "1", "", ""]

我想提醒所有数组值是否都是 blanks ，即数组何时是这样:

I want to alert when all the array values are blanks, i.e, when the array is like this:

["", "", "", "", "", ""]

我如何实现这一目标.

推荐答案

您始终可以使用基本的 for 循环作为解决问题的方法:

You can always use a basic for loop as a solution for your problem:

function allBlanks(arr)
{
    for (var i = 0; i < arr.length; i++)
    {
        if (arr[i] !== "") return false;
    }

    return true;
}

console.log(allBlanks(["", "", "", "1", "", ""]));
console.log(allBlanks(["", "", "", "", "", ""]));
console.log(allBlanks(["", [], "", null, undefined, ""]));

.as-console {background-color:black !important; color:lime;}
.as-console-wrapper {max-height:100% !important; top:0;}

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