Question

177

How to use jQuery.map() on array of objects to return array of arrays

rated 0 times [ 181] [ 4] / answers: 1 / hits: 48908 / 14 Years ago, wed, february 2, 2011, 12:00:00

I would like to use jQuery to convert an array of objects to array of arrays using map.

For example if I have this:

var ObjArr = [{ a:1,b:2 },{ a:2,b:3 },{ a:3,b:4 }];

var ArrArr = $.map(ObjArr, function(n,i){

   return [ n.a, n.b ];

});

So that the result would be:

ArrArr = [[1,2],[2,3],[3,4]]

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frederickmohamedw

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answered 14 Years ago braidenv · Accepted Answer

With the jQuery.map()^(docs) and map()^(docs) methods you need to double wrap the return value:

var ArrArr = $.map(ObjArr, function(n,i){

   return [[ n.a, n.b ]];

});

...otherwise for some reason it concats the Array being returned. This way it concats the outer Array, and placing the content (the inner Array) at the next index.