Implement range function without using numbers in code
Javascript (49)(45)
As feersum said, I do not know why anyone would have to use numbers here.
f=(a,b)=&gt;{for(c=[];a&lt;b;c.push(a++));return c}

Old:
f=(a,b)=&gt;{c=[];for(;a&lt;b;a++){c.push(a);}return c}

I am sure it can be golfed down further=)