javascript - Encapsulate the repeated parts of these two functions into one function?

Question

//给数组中的每一项增加3

function addThreeForEachItem(array){

      for(var i = 0; i < array.length; i++){

        array[i] = array[i] + 3;

    }

    return array;

}

//将数组中的每一项编码

function encodeEachItem(array){

    for(var i = 0; i < array.length; i++){

        array[i] = encodeURIComponent(array[i]);

    }

    return array;

}

The two functions are very similar (duplicate). How to encapsulate the repeated parts of these two functions into one function?

Answer 1

There is a native method without encapsulation

array.map(item=>item+3)
array.map(item=>encodeURIComponent(item))

Answer 2

The map method that comes with JS has encapsulated your needs

Answer 3

可以考虑给第二个参数来区分
function repeatControl(array,param){
 for(var i = 0; i < array.length; i++){
    if(param=='addThree'){
       array[i] + = 3;
    }else{
       array[i] = encodeURIComponent(array[i]);
    }
 }
  return array;
}