lo-dash and sparse arrays converting previously set indexes as holes

[mohitmayank]

with lo-dash setting arrays with object notations or objects with numeric indexes or sparse arrays makes holes in array

if i am setting following keys

set('base.child.2.test', 100); or set('base.child[2].test', 100); //sparce array

where child already have a 0 index. it gets converted to undefined.

starting - base = { child : [ { test : 50 } ] }; model.set('base', base);

model.set('base.child.2.test', 100);

the result is

base = { child : [ undefined, undefined, { test : 100 } ] };

This problem appears when using lo-dash instead of underscore.

[gkatsev]

I'm not sure that's a problem. In js, when you set a high index on an array, you get holes.