Merge branch 'master' into third-edition

# Conflicts:
#	.gitignore
#	chapter01/01-HelloWorld.js
#	chapter01/04-TruthyFalsy.js
#	chapter01/05-EqualsOperators.js
#	chapter01/06-ConditionalStatements.js
#	chapter01/14-ES6ParameterHandling.js
#	chapter02/01-Introduction.js
#	chapter02/02-CreatingAndInitialingArrays.js
#	chapter02/03-AddingRemovingElements.js
#	chapter02/04-TwoDimensionalMultiDimensional.js
#	chapter02/05-ArrayMethods.js
#	chapter03/03-BalancedSymbols.html
#	chapter03/04-DecimalToBinary.html
#	chapter03/04-DecimalToBinary.js
#	chapter03/05-TowerOfHanoi.html
#	chapter04/03-PriorityQueue.html
#	chapter04/04-HotPotato.html
#	chapter06/03-Operations.html
#	chapter07/02-UsingDictionaries.html
#	chapter07/03-HashTable.js
#	chapter07/04-UsingHash.html
#	chapter07/04-UsingHash.js
#	chapter07/06-UsingHashCollisionSeparateChaining.js
#	chapter07/08-UsingHashCollisionLinearProbing.html
#	chapter08/01-BinarySearchTree.js
#	chapter09/02-UsingGraphs.html
#	chapter09/02-UsingGraphs.js
#	chapter11/01-Recursion.html
#	chapter11/01-Recursion.js
#	chapter11/02-InfiniteRecursion.html
#	chapter11/02-InfiniteRecursion.js
#	chapter11/03-MinCoinChangeDP.html
#	chapter11/04-MinCoinChangeGreedy.html

Author: loiane

chapter01/01-HelloWorld.js

@@ -0,0 +1,8 @@
+function output(t) {
+    document.write('<p>' + t + '</p>');
+    return;
+}
+
+alert('Hello, World!');
+console.log('Hello, World!');
+output('Hello, World!');

chapter01/04-TruthyFalsy.js

@@ -0,0 +1,23 @@
+function testTruthy(val){
+    return val ? console.log('truthy') : console.log('falsy');
+}
+
+testTruthy(true); //true
+testTruthy(false); //false
+testTruthy(new Boolean(false)); //true (object is always true)
+
+testTruthy(''); //false
+testTruthy('Packt'); //true
+testTruthy(new String('')); //true (object is always true)
+
+testTruthy(1); //true
+testTruthy(-1); //true
+testTruthy(NaN); //false
+testTruthy(new Number(NaN)); //true (object is always true)
+
+testTruthy({}); //true (object is always true)
+
+var obj = {name:'John'};
+testTruthy(obj); //true
+testTruthy(obj.name); //true
+testTruthy(obj.age); //age (prop does not exist)