How do you make a function change the variable put into it in javascript?

Question

I have been doing sheet.stopTC(aVal)

and it seems to go fine, however here:

key: "stopTC",
value: function stopTC(z) {

  if (z == true) {
    z = false;
    console.log("cache started");
  } else {
    z = true;
    console.log("cache stopped");
  }
  return z;
}

//globals
aVal = false

the variable is globally set to false but when it comes back the aVal stays false instead of changing to true`.

Sorry I'm new to programming and can't get my head around it.

If you pass in a variable in a function and *reassign it*, you are not changing the variable outside the function. JavaScript is a pass by value language, so you cannot manipulate what the variable outside the function is, unless you address it directly, e.g., if you do `aVal = true` inside the function, and `aVal` is visible, then it will be changed. — VLAZ, Oct 02 '19 at 11:20

score 0 · Answer 1 · answered Oct 02 '19 at 11:25

0

You should do aVal = sheet.stopTC(aVal) then it will became true

answered Oct 02 '19 at 11:25

Ricardo Araújo

155
4

How do you make a function change the variable put into it in javascript?

1 Answers1