Add all values in an array JavaScript/jquery

Question

<div id="timeCalac">Click me to calculate your average time</div>

myData = [34, 67, 78];
var arrayTotalValue = 0;

$("#timeCalac").click(function () {
    // arrayTotalValue = add value of myData array function
    arrayTotalValue = arrayTotalValue/myData.length;
    $("#timeCalac").html(arrayTotalValue);    
});

I am making a function that records how long it took for the user to click on a element I then use the .push() command to add this number to the myData array. Is there a JavaScript or jQuery function that can add the value of the myData array and then store it in the arrayTotalValue variable.

Rory McCrossan · Accepted Answer · 2015-01-15 11:46:30Z

1

There is no specific function to sum the values of an array, however you can use reduce() to achieve it:

myData = [34, 67, 78];
var arrayTotalValue = 0;

$("#timeCalac").click(function () {
    arrayTotalValue = myData.reduce(function(a, b) {
        return a + b;
    });
    $(this).html(arrayTotalValue);    
});

answered Jan 15, 2015 at 11:46

Rory McCrossan

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5 Comments

John Smith Over a year ago

How can I get the return value of this function then store it in my arrayTotalValue variable?

Rory McCrossan Over a year ago

@JohnSmith that's what this is doing...?

John Smith Over a year ago

How do I put it in a variable tho? I am new to all this

Rory McCrossan Over a year ago

It is in a variable - the arrayTotalValue variable.

Rory McCrossan Over a year ago

Here's a working example to hopefully make it more clear: jsfiddle.net/sd6Lwuny

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