pass a variable to foreach function

Question

Hi I want pass the var antwoord to

opleidingArray.forEach(haalScoresOp, antwoord);

So I can use it in the function HaalScoresOp

var antwoordenPerVraag = [2,1,3];

function haalScoresOp(item, index) {
  console.log("haal score op voor");
  console.log(item.naam, item.scores);

  console.log("haal antwoord op", antwoord);
}    

function berekenEindresultaten(item, index) 
{
  var opleidingArray = VragenEnScores.vragen[index].opleidingen;
  var antwoord = "bla";
  opleidingArray.forEach(haalScoresOp, antwoord);
}

antwoordenPerVraag.forEach(berekenEindresultaten);

• I tried binding but this does not function.
• I am getting antwoord is not defined as an error.

Answer 1

The way you're referencing antwoord inside haalScoresOp is invalid/nonsense/not good. You're referencing it as if it was a variable in scope… well, it's not. The function should accept it as parameter just like its other parameters:

function haalScoresOp(antwoord, item, index) {
  ..
  console.log(antwoord);
}

Then you can pass it in on the caller's side:

opleidingArray.forEach(function (item, index) {
    haalScoresOp(antwoord, item, index)
});

or:

opleidingArray.forEach(haalScoresOp.bind(null, antwoord));