Question

79

Check if all values in array are true, then return a true boolean statement (javascript)

rated 0 times [ 80] [ 1] / answers: 1 / hits: 123885 / 6 Years ago, sat, december 22, 2018, 12:00:00

I have an array of booleans, which begins as false, because at least one of the values is false:
var validation = [false, true, true]
In certain moment, it'll have all the options(index) as true, like:
validation = [true, true, true]
How can I set this array as true when all the options are true?

Sorry for the silly question.

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jackie

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answered 6 Years ago helenat · Accepted Answer

You can use .every() method:

let arr1 = [false, true, true],

    arr2 = [true, true, true];



let checker = arr => arr.every(v => v === true);



console.log(checker(arr1));

console.log(checker(arr2));

As mentioned by @Pointy, you can simply pass Boolean as callback to every():

let arr1 = [false, true, true],

    arr2 = [true, true, true];



let checker = arr => arr.every(Boolean);



console.log(checker(arr1));

console.log(checker(arr2));