add class to object stored in array

Question

I have an Array- myArray which is filled with objects obtained while looping using ".each"

Now I want to add a class .active

the array object can be printed using alert and shows correct innerhtml.

but how do i add class to the object?

Code:-

var myArray=new Array();

I tried this:-

$(myArray[1]).addClass('active');

Please share the .each loop as well

Niklas
– Niklas

2011-06-23 09:35:44 +00:00
Commented Jun 23, 2011 at 9:35 — Niklas
– Niklas, Commented Jun 23, 2011 at 9:35

aorcsik · Accepted Answer · 2011-06-23 10:17:18Z

3

Try mapping through your array:

$.map(myArray, function(elem) {
    $(elem).addClass('active');
});

Edit: A not so misleading way (thx @Sébastien RoccaSerra):

$.each(myArray, function(i,elem) {
    $(elem).addClass('active');
});

edited Jun 23, 2011 at 10:17

answered Jun 23, 2011 at 9:40

aorcsik

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6 Comments

Sébastien RoccaSerra Over a year ago

Your exemple works, but can be misleading. The 'map' function is more often used to produce a new array than to exert side effects on items. The 'each' function is more appropriate to iterate a function across an array. Just replacing 'map' with 'each' in your example looks more intention revealing to me. Cheers!

aorcsik Over a year ago

@Sébastien RoccaSerra I agree.

Raynos Over a year ago

@inti of course it does. Use ES5 shim to support legacy browsers. Array.prototype.map is part of the standard.

Raynos Over a year ago

@SebastienRoccaSerra apart from that $.each supplies the key as the first parameter and the value as the second

aorcsik Over a year ago

@Raynos $(myArray.map(function(v) { return v; })) equals $(myArray) so why use map here, or am I missing something?

|

Alex · Accepted Answer · 2016-09-05 15:44:43Z

1

try:

myArray[1].addClass('active');

or

myArray.eq(1).addClass('active');

edited Sep 5, 2016 at 15:44

Alex

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answered Sep 5, 2016 at 15:25

Elvis Farias

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Comments

kapa · Accepted Answer · 2011-06-23 09:45:13Z

0

$(myArray)[1].addClass('active');

edited Jun 23, 2011 at 9:45

kapa

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answered Jun 23, 2011 at 9:39

Jose Faeti

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3 Comments

DanielB Over a year ago

$(myArray)[1] is a DOM element and has no function addClass or am I wrong?

Jose Faeti Over a year ago

Correct me if I'm wrong, but if 'myArray' contains DOM elements, '$(myArray)' would be a collection of jQuery objects, which you can iterate with '.each()' and referencing to with '$(myArray)[x]', from what I know.

DanielB Over a year ago

You are right. Not my day today. $(myArray)[1][0] would be the DOM element of the 2nd entry in $(myArray).

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