CODEWITHSUNDEEP
javascriptecmascript-6
mqklin
mqklin

Reputation: 2048

Multiple define in for-of loop with ES6

It is possible to define multiple variables in a for-of loop like in the code below?

let arr = ['red', 'green', 'blue'];
for (let x = 0, y of arr){
  console.log(x++, y);
}

EDIT:

let arr = ['red', 'green', 'blue'];
let x = 0;
for (let y of arr){
  console.log(x++, y)
}

So i want to convert this code into the first one (or like that) and thus reduce number of code lines.

Upvotes: 1

Views: 1392

Answers (2)

Bergi
Bergi

Reputation: 664640

No, you cannot declare-and-initialise variables normally (like you can in for loops) in for … of or for … in loops.

What you can do though is destructuring, and for your use case there's the .entries() iterator that includes an index:

for (let [x, y] of ['red', 'green', 'blue'].entries())
    console.log(x, y);

Upvotes: 5

Vasyl
Vasyl

Reputation: 1423

No, it isn't possible, you can define only one variable in for...loop. Compilers such as babel or es6fiddle returns an error for such definition.

Upvotes: 1

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