How to check array have same values in typescript

Question

Trying to find array have same values or not in typescript but not working. So, How to findout. If anyone knows please help to find the solution.

app.component.ts:

  arr1 = ['1256','1256','1256'];
  arr2 = ['1256','8259','1256'];
  newArr=[];

 checkVal(val){
 val.forEach(x=>{ 
   this.newArr.push(x); 
 });

 if(this.newArr){
  alert("All the values are same in the array")
 }else{
  alert("No Diffent values are there in this array")
  } 
 }

 checkValApply1(){
  this.checkVal(this.arr1)
 }

 checkValApply2(){
  this.checkVal(this.arr2)
 }

Demo: https://stackblitz.com/edit/angular-ivy-9xyxxm?file=src%2Fapp%2Fapp.component.ts

Answer 1

We can use the every function, since we check that the first value of the array is equal to the following, and it can be applied as follows:

checkVal(val) {
    const firstValue = val[0];
    const isSame = val.every((x) => x === firstValue);

    if (isSame) {
      alert('All the values are same in the array');
    } else {
      alert('No Diffent values are there in this array');
    }
  }