Add key/value to an object inside an array

Question

How can i add a key+value to each object in my array. Do i have to make a loop or is there a simple method to do that?

What i have :

var tab = [];

tab.push({name: 'Volvo', firstname: 'Doto'}, {name: 'Velve', firstname: 'Dete'});

What i need is to add a property image for each object inside the tab array.

Like this :

var tab = [];

tab.push({name: 'Volvo', firstname: 'Doto', image: 'Volvoimg'}, {name: 'Velve', firstname: 'Dete', image: 'Velveimg'});

iterate the array and add the property to each of the objects. — thefourtheye
– thefourtheye, Commented Mar 10, 2016 at 14:18
Something like this : $.each(tab, function(i, field){ field.img = myimage; } ? Is there a better way? — teddym
– teddym, Commented Mar 10, 2016 at 14:22

gurvinder372 · Accepted Answer · 2016-03-10 14:19:33Z

5

try

tab = tab.map( function(value){value.image  = value.name + "img"; return value;} )

answered Mar 10, 2016 at 14:19

gurvinder372

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3 Comments

teddym Over a year ago

Well i think it was a bad example, i'm not trying to add the word "img" to the value, just to add a loop of image to my tab array for each obj

gurvinder372 Over a year ago

@teddym can you share the example of what you are looking for? Since my answer seems to be in synch with your question.

teddym Over a year ago

Well i never used map before, i'm reading the doc, i found the solution but thanks man, we learn everyday

Community · Accepted Answer · 2017-05-23 12:23:45Z

2

Map is one way if you wish to return an new array. gurvinder372 has an answer that shows how to use map.

An alternative is to use a forEach, this however has whats called 'side effects' and probably isn't the best approach. I think the map example is best, but I've included this as a matter of completeness.

tab.forEach((obj) => obj.image = "whatever goes here");

edited May 23, 2017 at 12:23

CommunityBot

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answered Mar 10, 2016 at 14:25

NMunro

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2 Comments

teddym Over a year ago

I never used map() before i'll look for it, thanks for your answer this is what i needed even if i knew it was something like this

NMunro Over a year ago

I'd encourage you to research map, even if you don't use it in this example it's still a very powerful function and does solve many problems. Also If you're done with this question please do mark it as answered. Thanks.

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