Shortest Chunk implementation

chunk.js

//chunk
function chunk(arr, n) {
    var result = [];
    while(arr.length) {
        result.push(arr.splice(0,n))
    }
    return result;
}

//chunk - obfuscated (72 chars)
function chunk(n,u,r){for(r=[];n.length;)r.push(n.splice(0,u))
return r}