Calling a repeated set of instructions in a function.

Report · Mar 20, 2022

I am writing a quiz for my students. There are set of question marks that I keep needing to hide.

Here are the instructions that work.

this.qmmcm.visible=false;

this.qcmm.visible=false;

this.qmkm.visible=false;

this.qcmmm.visible=false;

I have written these into a function like this:

function hidequestionmarks();{

this.qmmcm.visible=false;

this.qcmm.visible=false;

this.qmkm.visible=false;

this.qcmmm.visible=false;

}

But when I try to call these from another function, it doesn't work.

I use the instruction

hidequestionmarks();

in the other function.

Can someone given me some guidance as to what I am doing wrong.

Thank you

Rod

Report · Mar 20, 2022

Hi.

Can you give us an example of how/where you calling your function?

Regards,

JC

Report · Mar 20, 2022

//I have extracted this from the code.

//This function hides a set of 6 question marks that I use in the game.

function hidequestionmarks() {
this.qmmcm.visible = false;
this.qcmm.visible = false;
this.qmkm.visible = false;
this.qcmmm.visible = false;
this.qmcm.visible = false;
this.qkmm.visible = false;
}

//now all I want to do is to call this function when I click a button to show just one question mark behind which there will be an answer for the students.

// you will notice that I have repeated the instructions to hide all the questionmarks. I would like to understand how I can call the function hidequestionamrks() instead so that I can reuse the code in other parts of the game.

numholder = 0
function go() {
//this.addEventListener("click", hidequestionmarks.bind(this)); //this is so cool
this.qmmcm.visible = false;
this.qcmm.visible = false;
this.qmkm.visible = false;
this.qcmmm.visible = false;
this.qmcm.visible = false;
this.qkmm.visible = false;
this.cmmm.text = "";
this.mcm.text = "";
this.kmm.text = "";
this.mmcm.text = "";
this.cmm.text = "";
this.mkm.text = "";
do {
next = randomIntFromInterval(1, 6)
} while (next == numholder)

numholder = next;
switch (next) {
case 1:
this.qcmmm.visible = true;
break;
case 2:
this.qmcm.visible = true;
break;
case 3:
this.qkmm.visible = true;
break;
case 4:
this.qmmcm.visible = true;
break;
case 5:
this.qcmm.visible = true;
break;
case 6:
this.qmkm.visible = true;
break;
}

}

Report · Mar 20, 2022

Pass "this" as an argument to the function.