ReferenceError: self is not defined in nodejs module

Asked Aug 20 '19 at 12:45

Active Aug 20 '19 at 12:45

Viewed 27 times

I want to reuse same function defined within the same class but I am getting error self is not defined. Can anyone suggest what is the correct approach to call a function in nodejs module.

Here is my code,

class addresses{
 constructor() {
    super();
    this.plural = 'addresses';
    this.singular = 'address';
}

parseCoordinates(arr) {
   arr.forEach(function (value, index) {
    if (Array.isArray(value)) {
        self.parseCoordinates(value); // Error at this line
    } else if (!isNaN(parseFloat(value))) {
        arr[index] = (+value);
    }
  });
 }
}
module.exports = new addresses();

asked Aug 20 '19 at 12:45

sridharnetha

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1

did you tried using `this` ? – Code Maniac Aug 20 '19 at 12:46
Why do you expect it to be defined? – Quentin Aug 20 '19 at 12:46
@CodeManiac — `this` won't work in a callback like that – Quentin Aug 20 '19 at 12:46
Confusing with Python habits maybe? – trincot Aug 20 '19 at 12:46
tried `this` got the error like not defined. – sridharnetha Aug 20 '19 at 12:47
1

Several solutions: (1) add `var self = this` as statement before `arr.forEach`. Or (2) make callback an arrow function, replacing `function (value, index)` with `(value, index) =>` and replace `self` with `this`. Or some solution with `bind`, ... – trincot Aug 20 '19 at 12:50

ReferenceError: self is not defined in nodejs module

0 Answers0