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javascriptenumerate

Javascript entries() not returning anything

I want to get the array elements, with their indexes, I use entries() as below but it does not print out anything, and it does not give any errors.

var array1 = ['a', 'b', 'c'];

var iterator1 = array1.entries();

for ([k, v] in iterator1) {
  console.log(k, v)
}

Solution

  • You should use for of instead of for in

    var array1 = ['a', 'b', 'c'];
var iterator1 = array1.entries();

for ([k, v] of iterator1) {
  console.log(k, v)
}

    Another way is to use done property and next method of iterators

    var array1 = ['a', 'b', 'c'];
var iterator1 = array1.entries();
let result = iterator1.next()

while (!result.done) {
  let [k, v] = result.value
  console.log(k, v)
  result = iterator1.next()
}