every Array Method | JavaScript Tutorial

In this tutorial we're going to learn about the #every #JavaScript #Array Method and how it can be used to check if all of the values from an array return a truthy value when they are passed through a callback function.

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[sirbacharach]

Sir, you are a saint, I was stuck on a question related to using every with an object within an array, this helped me understand how to do it immenseley.

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[nandinigupta]

Can you please explain how [2, 3].every((i, j)=>i==j+2) evaluates to true?

[MundoYeko]

Usefull tip : this function stops when finds a false value. So for large arrays is better an every than a foreach

[ToddsDiscGolf]

why does this work as an arrow function but not a regular function?
DOESN'T WORK (returns undefined):

function isTheDinnerVegan(objectArray) {
objectArray.every(food => food.source === 'plant')
}

DOES WORK (returns correct boolean):

const isTheDinnerVegan = objectArray => objectArray.every(food => food.source === 'plant')

[memesalldayjack]

i thought this was every array method, not a method called "every",
i didn't even know there was a method called "every"