2d array to associative array using underscore's _.map

问题

I'm trying to map 2d array:

var fkOptionList2d = [[3, 'Orange'],[5, 'Banana'],[6, 'Coconut']]

to an associative array:

var fkOptionList1d = [{id: 1, label: 'Orange'},{id: 2, label: 'Banana'},{id: 3, label: 'Coconut'}]

but I'm new to underscore.js and don't quite get it yet. Should it be something like:

fkTableArr1d = _.object(_.map(fkTableArr2d, function(item, id) {
   return [{"id: " + id,"label: " + item}]
}));

?

回答1:

As per my understanding you need to use

return [{
    "id " : id, "label " : item
}]

instead of

return [{"id: " + id,"label: " + item}]

You are returning invalid JSON from the function

Additionally you don't need _.object method

fkTableArr1d = _.map(fkTableArr2d, function(item, id) {
      return [{
        "id " : id, "label " : item
        }];
    });

DEMO

来源：https://stackoverflow.com/questions/19655991/2d-array-to-associative-array-using-underscores-map