Question

How to check if all values in array are equal in TypeScript

Answer 1

function allInArrayAreEqual(arr : any) : boolean {
  	const result = arr.every(element => {
    		if (element === arr[0]) {
      			return true;
    		}
  	});

  	return result;
}
const arr1 = ['typescript', 'typescript', 'typescript'];
console.log(allInArrayAreEqual(arr1));

const arr2 = ['c', 'typescript', 'c++'];
console.log(allInArrayAreEqual(arr2));

  
  
  
  
/*
run:
  
true
false
  
*/

 

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