Paged collections in lodash

gistfile1.js

// Use _.mixin to extend lodash
_.mixin({
    'paged': function(collection, size) {
        var pages = [];
    
        this.each(myarr, function(val, i) {
            var pos = Math.floor(i/size);
            if (!pages[pos]) pages.push([]);
            pages[pos].push(val);
        });
        
        return pages;
    }
});

// Test
var myarr = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p'];
console.log(_.paged(myarr, 4));
console.log(_(myarr).paged(6));

Test available at jsfiddle here: http://jsfiddle.net/spoike/NhSxW/