Javascript: iterate through array and add % after each element except last

Question

I want to add a % after each element in the array except the last. So far I have come up with this:

var array = [a, b, c];
for(var i=0; i<array.length; i++) {
      var outcome += array[i] + '%';
}

Outcome:

a%b%c%

How can I fix this so the % does not appear at the end of the outcome?

`var outcome = array.join('%');` – Jhecht Mar 18 '20 at 22:48 — Jhecht, Mar 18 '20 at 22:48
you can also remove last item of a string by using `slice` – Noob Mar 18 '20 at 22:50 — Noob, Mar 18 '20 at 22:50

score 2 · Accepted Answer · edited Mar 18 '20 at 22:58

2

You can use the Array.prototype.join method in order to get what you're after:

console.info(['a', 'b', 'c'].join('%'))

edited Mar 18 '20 at 22:58

Phil

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answered Mar 18 '20 at 22:50

Jim McGaw

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Thanks @Phil, updated. – Jim McGaw Mar 18 '20 at 22:57

score -2 · Answer 2 · answered Mar 18 '20 at 22:50

-2

Check if the current element (value of i) is not the last element. If it's the last element don't concatenate a %, for all others concatenate with the %.

for(var i = 0; i < arr.length; i++) {
    if(arr[i] < arr.length -1) {
       var outcome += arr[i] + '%';
    }
}

answered Mar 18 '20 at 22:50

Nick Kinlen

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1

this will full skip the last element, instead of just not adding the `%` – Jhecht Mar 18 '20 at 22:52

Javascript: iterate through array and add % after each element except last

2 Answers2