[avanzyl]

Hi,

I would like to sum the keys of a checkgroup using javascript. As an example, lets say I have:

var Score = []

I would like to get the key of all the values in the $("#checkgroup") that are checked. i.e. If I have a checkgroup with three options, and if the keys for those options are 1,2,3 respectively, and all 3 are checked, I would like to have var Score = 6.

Any help would be great.

[amosbatto]

Try this:

Code: Select all

var score = $("#myCheckgroup").getValue().reduce(function(total, num) {return parseInt(total) + parseInt(num);}); 

[avanzyl]

Hi Amos,

I have tried to apply the code and get the following:

VM542:12 Uncaught TypeError: Reduce of empty array with no initial value
at Array.reduce (<anonymous>)
at eval (eval at <anonymous> (VM467 jquery-1.11.js:2), <anonymous>:12:35)
at eval (<anonymous>)
at VM467 jquery-1.11.js:2
at Function.globalEval (VM467 jquery-1.11.js:2)
at m.fn.init.domManip (VM467 jquery-1.11.js:3)
at m.fn.init.append (VM467 jquery-1.11.js:3)
at Script.render (VM475 PMDynaform.js:4954)
at Project.checkScript (VM475 PMDynaform.js:2547)
at Project.loadProject (VM475 PMDynaform.js:2590)

Dont understand why though.

[amosbatto]

Either the keys of your options are not numbers or you have no selected checkboxes in the checkgroup and reduce() doesn't work on an empty array.

Try it this way:

Code: Select all

var aScores = $("#selectScores").getValue();
var score = aScores.length == 0 ? 0 : aScores.reduce(function(total, num) {
      return (isNaN(parseInt(total)) ? 0 : parseInt(total)) + (isNaN(parseInt(num)) ? 0 : parseInt(num));
});

Sum scores in checkgroup.json

(1.76 KiB) Downloaded 252 times

[avanzyl]

Thanks Amos,

Just on your initial comment.

This is the first time the checkgroup will be displayed to the user so there wont be any selections made. I need the score to be tallied up at the end of the form so the they could as an example be scored on what they selected in the checkgroup.