You might at this point throw at me the concat() method in Lodash however, if you look at the docco it reveals the following:
Creates a new array concatenating array with any additional arrays and/or values.
So it would be nice to have
_.pushAll(destArray, srcArray). All this would do is :
Array.prototype.concat.apply( destArray, srcArray );
and as such modify the destination array and not create a new one. Simple, no?