A Handlebar.js helper that returns a given number of items in an array starting from a given index

handlbars-limit-helper.js

Handlebars.registerHelper('limit', function(collection, limit, start) {
    var out   = [],
        i, c;

    start = start || 0;

    for (i = c = 0; i < collection.length; i++) {
        if (i >= start && c < limit+1) {
            out.push(collection[i]);
            c++;
        }
    }

    return out;
});

Eh... is there any reason why you didn't just do this:

Handlebars.registerHelper('limit', function(collection, limit, start) {
    return collection.slice(start, start + limit);
});

Also there is a bug in current implementation, line 8: If you are starting count (c) from 0 you don't need to have c < limit + 1 : remove the +1

In this case I think that we need to do this.

Handlebars.registerHelper('limit', function( collection, limit, start ) {
  return collection.slice( start, limit + 1 );
});