Demonstrate CPS for array processing

demo-cps.js

// ==ClosureCompiler==
// @compilation_level ADVANCED_OPTIMIZATIONS
// @output_file_name cps-demo.js
// @formatting pretty_print
// ==/ClosureCompiler==

function forEach(coll, f) { 
  for(var i = 0; i < coll.length; ++i) { 
    f(coll[i]);
  } 
} 

function cps_filter(f, x, next) { if(f(x)) next(x); } 
function cps_map(f, x, next) { next(f(x)); } 

function m1(x) { return x / 2; } 
function f2(x) { return x % 2 == 0; } 
function m3(x) { return x * 10; } 

var input = [2, 4, 6, 8]
var a = []; 
forEach(input, function(x1) {
  cps_map(m1, x1, function(x2) { 
    cps_filter(f2, x2, function(x2) { 
      cps_map(m3, x2, function(x3) { 
        a.push(x3); })})})});

Example code for blog entry: http://blog.n01se.net/?p=362