I am trying to write a programme to move all the zeroes at the end of the array and retain and the original order of other elements.
Here is my code:-
var moveZeros = function (arr) {
// TODO: Program me
var k=0;
for (var i=0;i<=arr.length-1;i++){
var s=arr[i];
if (s===0){
arr.splice(i,1);
k++
}
}
for (var j=0;j<=k-1;j++){
arr.push(0);
}
return arr
}
But when zeros are next to each other like [1,0,0,1] it doesn't work.
I don't see why.
Can anybody tell?
And please also explain why k-1 not k I wrote k-1 by observing the output. Please don't tell the answer to the original problem I just want to fix the problem with my code. :)
The problem is that in each loop you increase the i variable by one. Meaning, you go to the next index. But if you have 2 or more zeros in the row, and you remove the first one, you shouldn't change i to i + 1, because i already points at a new value in the array(which is zero) :)
var moveZeros = function (arr) {
// TODO: Program me
var k = 0;
for (var i = 0; i <= arr.length - 1;) {
var s = arr[i];
if (s === 0) {
arr.splice(i, 1);
k++;
} else {
i++;
}
}
for (var j = 0; j <= k - 1; j++) {
arr.push(0);
}
return arr;
};
console.log(moveZeros([1,0,0,2]));