Question

I want to replace a collection inside a view. I use the reset command like this:

var maColl=mContent.get(ici).get("svgParameterList");  
msvgParameterListView.collection.reset(maColl);

A JSON.stringify gives this :

maColl

    [{"id":"x","name":"x"},....{"id":"style","name":"style"}]  

msvgParameterListView.collection

    [[{"id":"x","name":"x"},....{"id":"style","name":"style"}]]  

Now, i have my collection in an array, so when i render it return null value.

How to change array of collection into collection ?
In short, how to make msvgParameterListView.collection equal to maColl ?

Note the [[ ]] for the new collection.
Note maColl is a collection inside another collection.

Answer 1

If I understand correctly, you are trying to reset a collection with the models of another collection? collection.toJSON is your friend:

toJSON collection.toJSON()
Return an array containing the attributes hash of each model in the collection. This can be used to
serialize and persist the collection as a whole. The name of this
method is a bit confusing, because it conforms to JavaScript’s JSON
API.

which could be applied like this

msvgParameterListView.collection.reset(maColl.toJSON());

Or if you want to keep a reference to the original models, pass maColl.models

msvgParameterListView.collection.reset(maColl.models);

Passing directly a collection to reset will only confuse Backbone.