delegation by composition #01

// Simple compose example (extract from Scott Sauyet)

// Simplest compose
var compose = function(f, g) {   
    return function(x) {
        return f(g(x));
    };
};
var trim = function(str) {return str.replace(/^\s*|\s*$/g, '');};
var capitalize = function(str) {return str.toUpperCase();};

var convert = compose(trim, capitalize);

console.log('"' + convert('   abc def ghi  ') + '"');

Drawbacks:

It loses track of the this context used to call it.
It ignores all but the first argument passed to the initial function.