Pascal Triangle

pascal.js

function pascal(depth){
    var value = function(col,row){ return (col===1 || row===1 || col===row) ? 1 : value(col-1, row-1) + value(col, row-1); }
    return Array.apply(null, {length: depth})
        .map(function(u,row,self){ return Array.apply(null,{length:row+1}).map(function(u,col,self){ return value(col+1,row+1)}); });
}