find even numbers in an array javascript
arr.filter(num => num % 2)
find even numbers in an array javascript
arr.filter(num => num % 2)
check every value in array javascript
["foo", "foo", "foo"].every((item, index) => item === "foo") // returns true since every item matches our condition
["foo", "bar", "foo"].every((item, index) => item === "foo") // return false because not all items match our condtion
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