Small snippet to check if an array is fully uniform. All elements inside array must be same to produce true result. If they are different then the array is not uniform and false.

arrayUniform.js

var falseTracker = 0;
isUniform(["2","2","2","2"]);

function isUniform(array) {

  var firstElement = array[0];
  array.shift();
  array.forEach(function(element,index) {
      if (firstElement !== element)          
        falseTracker = 1;
    });
  
  if(falseTracker === 1) {
    console.log("false");
    falseTracker = 0; //reset switch to re-use function. 
  }
  else
    console.log("true");
}

Thank you, this helped.