[TypeScript] Counting Sort

countingSort.ts

private countSort(
  rangeMin: number, rangeMax: number, arr: number[]) {
    
       let mappingArr: boolean[] = [];

    
       //Initial
    
       for (let i = rangeMin; i <= rangeMax; i++) {   
            mappingArr[i] = false;
       }
       //Use the mapping array to map the target array

    
       for (let i = 0; i < arr.length; i++) {
            mappingArr[arr[i]] = true;
       }

      //Use the mapping array to generate the sorted array   
       let index=0;
    
       for (let i = rangeMin; i <= rangeMax; i++){
      
           if (mappingArr[i]==true)
        
               arr[index++] = i;
    
       }
}


//Demo
//let arr: number[] = [5, 3, 2, 8, 10, 4, 7, 6, 1, 9];
//this.countSort(1, 10, arr);
// > 1,2,3,4,5,6,7,8,9,10