jremmen

function opop(obj,k) {
	for(o in obj) {
		if(o == k) {
			result = obj[o];
			delete obj[o];
			return result;
		}
		else if(typeof obj[o] == 'object' && obj[o].constructor == Object) {
			if(a = opop(obj[o], k)) return a;
		}

jremmen

function mergesort(list) {
	if(list.length <= 1) return list;
	var l = mergesort(list.slice(0, list.length / 2));
	var r = mergesort(list.slice(list.length / 2));
	return merge(l, r);
}

function merge(l, r) {
	var result = [];
	while(l.length > 0 || r.length > 0) {

jremmen

var Point = function(x, y) {
	this.x = x;
	this.y = y;
};

function getDistance(a, b) {
	return Math.sqrt(Math.pow((a.x - b.x), 2) + Math.pow((a.y - b.y), 2));
};

jremmen

function quick_sort(a) {

	var m = a.length;

	if(m <= 1) return a;

	var v = a.shift();
	var l = [];
	var r = [];

jremmen

var max = reduce(function(a, b) { return a > b; });
var min = reduce(function(a, b) { return a < b; });

function reduce(p) {
  return function(a) {
    function iter(a, c) {
      if(a.length === 0) return c;
      else return iter(a.slice(1), p(a[0], c) ? a[0] : c);
    }
    return iter(a.slice(1), a[0]);

jremmen

calculate = function(a, f) { return a.reduce(function(x,y) { return f(x, y) }); }

sum = function(a, b) { return a + b; }
sub = function(a, b) { return a - b; }

sumAll = function(a) { return calculate(a, sum); }
subAll = function(a) { return calculate(a, sub); }

jremmen

function text2bin(msg) { return msg.split('').map(function(x) { var b = x.charCodeAt(0).toString(2); return Array(9 - b.length).join(0) + b; }).join(''); }

function bin2text(bin) { return bin.match(/(.{1,8})/g).map(function(x) { return String.fromCharCode(parseInt(x, 2)) }).join(''); }

jremmen

function im(n) { var a = Array.apply(null, new Array(n)); return a.map(function(x, i) { return a.map(function(y, k) { return i === k ? 1 : 0; }) }) }

jremmen

mmultiply = function(a,b) {
	return a.map(function(x,i) {
		return transpose(b).map(function(y,k) {
			return dotproduct(x, y)
		});
	});
}

dotproduct = function(a,b) {
	return a.map(function(x,i) {

jremmen

zipw = function(a,b,f) {
	var c = a.length < b.length ? {a:a, b:b} : {a:b, b:a};
	return c.a.map(function(x,i) {
		return f(x,c.b[i]);
	});
}
zipw([1,2,3],[10,11,12], function(x,y) { return x + y; }); // [11,13,15]
zipw([1,2,3],[10,11,12], function(x,y) { return x * y; }); // [10,22,36]