Adding to elements to an array after a certain character javascript

Question

I am writing a program for a bowling game and want to add 0 after every 10 in my array. eg

arr=[1,2,4,10,9,2,10,1,1];

this is what I want:

newarr=[1,2,4,10,0,9,2,10,0,1,1];

I have been trying:

for (i=0; i<arr.length; i++){
    if (arr[i]=10){
        newarr=arr.splice(i,0,0);
    }
}
console.log(newarr);

Answer 1

By the way, you should use == for comparison.

 var arr = [1, 2, 4, 10, 9, 2, 10, 1, 1]; var newArr = new Array(); for (i = 0; i < arr.length; i++) { newArr.push(arr[i]); if (arr[i] == 10) newArr.push(0); } alert(newArr); 

Answer 2

There are a few problems with your code.

• You are accidentally using = instead of == . The former is for assignment and the latter for comparison.
• Array.splice modifies the original array, so there is no need for a new array.
• You should be inserting the 0 at position i+1 instead of i to add it after the 10 instead of before.

 arr=[1,2,4,10,9,2,10,1,1]; for (i=0; i<arr.length; i++){ if (arr[i]==10){ arr.splice(i+1,0,0); } } console.log(arr);