check if every value in array is the same code example
Example 1: check if array has same values javascript
const allEqual = arr => arr.every(v => v === arr[0]);
allEqual([1,1,1,1]); // true
Example 2: javascript every
const age= [2,7,12,17,21];
age.every(function(person){
return person>18;
}); //false
//es6
const age= [2,7,12,17,21];
age.every((person)=> person>18); //false
Example 3: check array values equal js
[1,1,1,1].every( (val, i, arr) => val === arr[0] ) // true