在JavaScript数组中检查真实值的最简单方法

Question

I have an array, and I want to check if any member is truthy. I've tried looping over the array to check for falsy values:

typeof val !== 'undefined' && val !== null && val != 0

...but this seems needlessly verbose for something so simple, and error prone.

Answer 1

如果要测试真实成员，只需将他们作为布尔值进行测试，即可确定其真实性。

const isAnyTruthy = array.some(Boolean)

Answer 2

Array.some(Boolean) . Check out this fiddle .

Answer 3

Another way of doing it is use !! to check the truthy of the value.

const haveTruthyValue = arr.some(x => !!x)