TimBlock

function withBoxUnlocked(body) {

  var closed = box.locked;
  if (!closed) return body();
  box.unlock();
  try{ 
    return body();
  } finally{
    box.lock();
  }

TimBlock

function MultiplicatorUnitFailure() {}

function primitiveMultiply(a, b) {
  if (Math.random() < 0.5)
    return a * b;
  else
    throw new MultiplicatorUnitFailure();
}

function reliableMultiply(a, b) {

TimBlock

function logFive(sequence) {
  for (var i = 0; i < 5; i++) {
    if (!sequence.next())
      break;
    console.log(sequence.current());
  }
}

function ArraySeq(array) {
  this.pos = -1;

TimBlock

// Your code here.
function StretchCell(inner, width, height){
  this.inner = inner;
  this.width = width;
  this.height = height;
};
StretchCell.prototype.minWidth = function(){
  return Math.max(this.width, this.inner.minWidth());
}
StretchCell.prototype.minHeight = function() {

TimBlock

// Your code here.
function Vector(x,y){
  this.x=x;
  this.y=y;
};
Vector.prototype.plus = function(vector){
  return new Vector(this.x+vector.x, this.y+vector.y)
}

Vector.prototype.minus = function(vector){

TimBlock

// Your code here.
function every(array,predicate){
  for(var i = 0; i<array.length; i++){
    if (!predicate(array[i]))
    return false;
	}
  return true;
}

function some(array,predicate){

TimBlock

function average(array) {
  function plus(a, b) { return a + b; }
  return array.reduce(plus) / array.length;
}
 
 var century = people(ancestry,function(person){
   return Math.ceil(person.died / 100);
 });

for(var cent in century){

TimBlock

function average(array) {
  function plus(a, b) { return a + b; }
  return array.reduce(plus) / array.length;
}

var byName = {};
ancestry.forEach(function(person) {
  byName[person.name] = person;
});

TimBlock

var arrays = [[1, 2, 3], [4, 5], [6]];
console.log(arrays.reduce(function(a,b) {
 return a.concat(b);
}));

// Your code here.
// → [1, 2, 3, 4, 5, 6]

TimBlock

// Your code here.
function deepEqual(obj1,obj2){
  if(obj1===obj2) return true;
  
 if (obj1 == null || typeof obj1 != "object" ||
      obj2 == null || typeof obj2 != "object")
    return false;
  
var propObj1 = 0, propObj2 = 0;