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Longino
Longino

Reputation: 180

How to embed an if statement in a "for of" loop

I have a genuine quetion. Given this simple JS code:

for (let x of array) {
   if (x != array[0]) {
       // do stuff
   }
}

Is there a way to embed the "if" statement directly into the for loop?

I tried something like this:

for (let x of array if x != array[0] {
   // do stuff    
}

And:

for (let x != array[0] of array) {
   // do stuff
}

But both of them didn't work. Let me know if you can find a solution!

Upvotes: 3

Views: 895

Answers (3)

James Black
James Black

Reputation: 205

If you specifically only want to do stuff on the 2nd - nth element, you can just use a for loop and start at 1 instead of 0.

for (let i = 1; i < arr.length; i++) {
  // do stuff
}

Upvotes: 1

Frank Yohan Rodr&#237;guez P&#233;rez
Frank Yohan Rodr&#237;guez P&#233;rez

Reputation: 121

You cant pass a boolean in a "for of" or "for in" loops , the only way of do a comparison for an iteration of a loop is doing :

let array = ["37","728"];

for (let x = 0 ; ((x < array.length) && array[x] == "37") ; x++){
  console.log(array[x]);
}

And it will break the for loop if the second condition pass to true

Upvotes: 1

Spectric
Spectric

Reputation: 31992

You can filter the array with the condition and iterate through that result:

const array = [1, 2, 3]

for(let x of array.filter(e => e != array[0])){
    console.log(x)
}

Upvotes: 5

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