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]]
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.