completed up to about_arrays.js

Orphiex · Orphiex · commit 7fa4bd47c37b · 2016-01-19T09:02:38.000+08:00
diff --git a/topics/about_arrays.js b/topics/about_arrays.js
@@ -2,34 +2,34 @@ module("About Arrays (topics/about_arrays.js)");
 
 test("array literal syntax and indexing", function() {
     var favouriteThings = ["cellar door", 42, true]; // note that array elements do not have to be of the same type
-    equal(__, favouriteThings[0], 'what is in the first position of the array?');
-    equal(__, favouriteThings[1], 'what is in the second position of the array?');
-    equal(__, favouriteThings[2], 'what is in the third position of the array?');
+    equal("cellar door", favouriteThings[0], 'what is in the first position of the array?');
+    equal(42, favouriteThings[1], 'what is in the second position of the array?');
+    equal(true, favouriteThings[2], 'what is in the third position of the array?');
 });
 
 test("array type", function() {
-    equal(__, typeof([]), 'what is the type of an array?');
+    equal("object", typeof([]), 'what is the type of an array?');
 });
 
 test("length", function() {
     var collection = ['a','b','c'];
-    equal(__, collection.length, 'what is the length of the collection array?');
+    equal(3, collection.length, 'what is the length of the collection array?');
 });
 
 test("splice", function() {
     var daysOfWeek = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];
-    var workingWeek = daysOfWeek.splice(__, __);
-    ok(workingWeek.equalTo([__]), 'what is the value of workingWeek?');
-    ok(daysOfWeek.equalTo([__]), 'what is the value of daysOfWeek?');
+    var workingWeek = daysOfWeek.splice(0, 5);
+    ok(workingWeek.equalTo(['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']), 'what is the value of workingWeek?');
+    ok(daysOfWeek.equalTo(['Saturday', 'Sunday']), 'what is the value of daysOfWeek?');
 });
 
 test("stack methods", function() {
     var stack = [];
     stack.push("first");
     stack.push("second");
 
-    equal(__, stack.pop(), 'what will be the first value popped off the stack?');
-    equal(__, stack.pop(), 'what will be the second value popped off the stack?');
+    equal("second", stack.pop(), 'what will be the first value popped off the stack?');
+    equal("first", stack.pop(), 'what will be the second value popped off the stack?');
 });
 
 test("queue methods", function() {
@@ -38,6 +38,6 @@ test("queue methods", function() {
     queue.push("second");
     queue.unshift("third");
 
-    equal(__, queue.shift(), 'what will be shifted out first?');
-    equal(__, queue.shift(), 'what will be shifted out second?');
+    equal("third", queue.shift(), 'what will be shifted out first?');
+    equal("first", queue.shift(), 'what will be shifted out second?');
 });
diff --git a/topics/about_asserts.js b/topics/about_asserts.js
@@ -2,13 +2,13 @@
 module("About Asserts (topics/about_asserts.js)");
 
 test("ok", function() {
-    ok(__ === true, 'what will satisfy the ok assertion?');
+    ok(true === true, 'what will satisfy the ok assertion?');
 });
 
 test("not ok", function() {
-    ok(__ === false, 'what is a false value?');
+    ok(false === false, 'what is a false value?');
 });
 
 test("equal", function() {
-    equal(__, 1 + 1, 'what will satisfy the equal assertion?');
+    equal(2, 1 + 1, 'what will satisfy the equal assertion?');
 });
diff --git a/topics/about_assignment.js b/topics/about_assignment.js
@@ -2,11 +2,11 @@
 module("About Assignment (topics/about_assignment.js)");
 
 test("local variables", function() {
-    var temp = __;
+    var temp = 1;
     equal(temp, 1, "Assign a value to the variable temp");
 });
 
 test("global variables", function() {
     temp = 1; // Not using var is an example. Always use var in practise.
-    equal(window.__, temp, 'global variables are assigned to the window object');
+    equal(window.temp, temp, 'global variables are assigned to the window object');
 });
diff --git a/topics/about_control_structures.js b/topics/about_control_structures.js
@@ -5,15 +5,15 @@ test("if", function() {
 	if (2 > 0) {
 		isPositive = true;
 	}
-	equal(__, isPositive,  'what is the value of isPositive?');
+	equal(true, isPositive,  'what is the value of isPositive?');
 });
 
 test("for", function() {
 	var counter = 10;
 	for (var i = 1; i <= 3; i++) {
 		counter = counter + i;
 	}
-	equal(__, counter, 'what is the value of counter?');
+	equal(16, counter, 'what is the value of counter?');
 });
 
 test("for in", function() {
@@ -27,15 +27,15 @@ test("for in", function() {
 	for (var property_name in person) {
   		result = result + property_name;
 	}
-	equal(__, result, 'what is the value of result?');
+	equal("nameage", result, 'what is the value of result?');
 });
 
 test("ternary operator", function() {
 	var fruit = true ? "apple" : "orange";
-	equal(__, fruit, 'what is the value of fruit?');
+	equal("apple", fruit, 'what is the value of fruit?');
 
 	fruit = false ? "apple" : "orange";
-	equal(__, fruit, 'now what is the value of fruit?');
+	equal("orange", fruit, 'now what is the value of fruit?');
 });
 
 test("switch", function() {
@@ -48,7 +48,7 @@ test("switch", function() {
 			result = 2;
 			break;
 	}
-	equal(__, result, 'what is the value of result?');
+	equal(2, result, 'what is the value of result?');
 });
 
 test("switch default case", function() {
@@ -64,10 +64,10 @@ test("switch default case", function() {
             result = "Merry";
             break;
     }
-    equal(__, result, 'what is the value of result?');
+    equal("Merry", result, 'what is the value of result?');
 });
 
 test("null coalescing", function() {
     var result = null || "a value";
-    equal(__, result, 'what is the value of result?');
+    equal("a value", result, 'what is the value of result?');
 });
diff --git a/topics/about_equality.js b/topics/about_equality.js
@@ -2,22 +2,22 @@
 module("About Equality (topics/about_equality.js)");
 
 test("numeric equality", function() {
-    equal(3 + __,  7, "");
+    equal(3 + 4,  7, "");
 });
 
 test("string equality", function() {
-    equal("3" + __, "37", "concatenate the strings");
+    equal("3" + "7", "37", "concatenate the strings");
 });
 
 test("equality without type coercion", function() {
-    ok(3 === __, 'what is exactly equal to 3?');
+    ok(3 === 3, 'what is exactly equal to 3?');
 });
 
 test("equality with type coercion", function() {
-    ok(3 == "__", 'what string is equal to 3, with type coercion?');
+    ok(3 == "3", 'what string is equal to 3, with type coercion?');
 });
 
 test("string literals", function() {
-    equal(__, "frankenstein", "quote types are interchangable, but must match.");
-    equal(__, 'frankenstein', "quote types can use both single and double quotes.");
+    equal("frankenstein", "frankenstein", "quote types are interchangable, but must match.");
+    equal("frankenstein", 'frankenstein', "quote types can use both single and double quotes.");
 });
diff --git a/topics/about_functions_and_closure.js b/topics/about_functions_and_closure.js
@@ -7,14 +7,14 @@ test("defining functions directly", function() {
         result = "b";
     };
     changeResult();
-    equal(__, result, 'what is the value of result?');
+    equal(b, result, 'what is the value of result?');
 });
 
 test("assigning functions to variables", function() {
     var triple = function(input) {
         return input * 3;
     };
-    equal(__, triple(4), 'what is triple 4?');
+    equal(12, triple(4), 'what is triple 4?');
 });
 
 test("self invoking functions", function() {
@@ -23,23 +23,23 @@ test("self invoking functions", function() {
     // self invoking functions are used to provide scoping and to alias variables
     (function(pv) {
         var secretValue = "password";
-        equal(__, pv, 'what is the value of pv?');
-        equal("__", typeof(secretValue), "is secretValue available in this context?");
-        equal("__", typeof(publicValue), "is publicValue available in this context?");
+        equal("shared", pv, 'what is the value of pv?');
+        equal("yes", typeof(secretValue), "is secretValue available in this context?");
+        equal("yes", typeof(publicValue), "is publicValue available in this context?");
     })(publicValue);
 
-    equal("__", typeof(secretValue), "is secretValue available in this context?");
-    equal("__", typeof(publicValue), "is publicValue available in this context?");
+    equal("no", typeof(secretValue), "is secretValue available in this context?");
+    equal("yes", typeof(publicValue), "is publicValue available in this context?");
 });
 
 test("arguments array", function() {
-    var add = function() {
+    var add = function(x) {
         var total = 0;
         for(var i = 0; i < arguments.length; i++) {
             // complete the implementation of this method so that it returns the sum of its arguments
-            // __
+            total += x[i];
         }
-        // __
+        return total;
     };
 
     equal(15, add(1,2,3,4,5), "add 1,2,3,4,5");
@@ -48,28 +48,28 @@ test("arguments array", function() {
 
 test("using call to invoke function",function(){
     var invokee = function( message ){
-        return this + message;    
+        return this + message;
     };
-    
-    //another way to invoke a function is to use the call function which allows 
-    //you to set the callers "this" context.  Call can take any number of arguments: 
+
+    //another way to invoke a function is to use the call function which allows
+    //you to set the callers "this" context.  Call can take any number of arguments:
     //the first one is always the context that this should be set to in the called
     //function, and the arguments to be sent to the function,multiple arguments are separated by commas.
     var result = invokee.call("I am this!", "Where did it come from?");
-        
+
     equal(__, result, "what will the value of invokee's this be?");
 });
 
 test("using apply to invoke function",function(){
     var invokee = function( message1, message2 ){
-        return this + message1 + message2;    
+        return this + message1 + message2;
     };
-    
+
     //similar to the call function is the apply function.  Apply only has two
     //arguments:  the first is the context that this should be set to in the called
     //function and the second is the array of arguments to be passed into the called function.
     var result = invokee.apply("I am this!", ["I am arg1","I am arg2"]);
-        
+
     equal(__, result, "what will the value of invokee's this be?");
 });
 
diff --git a/topics/about_numbers.js b/topics/about_numbers.js
@@ -4,13 +4,13 @@ module("About Numbers (topics/about_numbers.js)");
 test("types", function() {
     var typeOfIntegers = typeof(6);
     var typeOfFloats = typeof(3.14159);
-    equal(__, typeOfIntegers === typeOfFloats, 'are ints and floats the same type?');
-    equal(__, typeOfIntegers, 'what is the javascript numeric type?');
-    equal(__, 1.0, 'what is a integer number equivalent to 1.0?');
+    equal(true, typeOfIntegers === typeOfFloats, 'are ints and floats the same type?');
+    equal("number", typeOfIntegers, 'what is the javascript numeric type?');
+    equal(1, 1.0, 'what is a integer number equivalent to 1.0?');
 });
 
 test("NaN", function() {
     var resultOfFailedOperations = 7/'apple';
-    equal(__, isNaN(resultOfFailedOperations), 'what will satisfy the equals assertion?');
-    equal(__, resultOfFailedOperations == NaN, 'is NaN == NaN?');
+    equal(true, isNaN(resultOfFailedOperations), 'what will satisfy the equals assertion?');
+    equal(false, resultOfFailedOperations == NaN, 'is NaN == NaN?');
 });
diff --git a/topics/about_objects.js b/topics/about_objects.js
@@ -3,30 +3,30 @@ module("About Objects (topics/about_objects.js)");
 
 test("object type", function() {
     var empty_object = {};
-    equal(__, typeof(empty_object), 'what is the type of an object?');
+    equal("object", typeof(empty_object), 'what is the type of an object?');
 });
 
 test("object literal notation", function() {
     var person = {
-        __:__,
-        __:__
+        name: "Amory Blaine",
+        age: 102
     };
     equal("Amory Blaine", person.name, "what is the person's name?");
     equal(102, person.age, "what is the person's age?");
 });
 
 test("dynamically adding properties", function() {
     var person = {};
-    person.__ = "Amory Blaine";
-    person.__ = 102;
+    person.name = "Amory Blaine";
+    person.age = 102;
     equal("Amory Blaine", person.name, "what is the person's name?");
     equal(102, person.age, "what is the person's age?");
-}); 
+});
 
 test("adding properties from strings", function() {
     var person = {};
-    person["__"] = "Amory Blaine";
-    person["__"] = 102;
+    person["name"] = "Amory Blaine";
+    person["age"] = 102;
     equal("Amory Blaine", person.name, "what is the person's name?");
     equal(102, person.age, "what is the person's age?");
 });
@@ -36,7 +36,7 @@ test("adding functions", function() {
         name: "Amory Blaine",
         age: 102,
         toString: function() {
-            return __;  // HINT: use the 'this' keyword to refer to the person object.
+            return "I " + this.name + " am " + this.age + " years old.";  // HINT: use the 'this' keyword to refer to the person object.
         }
     };
     equal("I Amory Blaine am 102 years old.", person.toString(), "what should the toString function be?");
diff --git a/topics/about_operators.js b/topics/about_operators.js
@@ -7,7 +7,7 @@ test("addition", function() {
   for (var i = 0; i <= 5; i++) {
     result = result + i;
   }
-  equal(__, result, "What is the value of result?");
+  equal(15, result, "What is the value of result?");
 });
 
 test("assignment addition", function() {
@@ -16,23 +16,23 @@ test("assignment addition", function() {
     //the code below is just like saying result = result + i; but is more concise
     result += i;
   }
-  equal(__, result, "What is the value of result?");
+  equal(15, result, "What is the value of result?");
 });
 
 test("subtraction", function() {
   var result = 5;
   for (var i = 0; i <= 2; i++) {
     result = result - i;
   }
-  equal(__, result, "What is the value of result?");
+  equal(2, result, "What is the value of result?");
 });
 
 test("assignment subtraction", function() {
   var result = 5;
   for (var i = 0; i <= 2; i++) {
     result -= i;
   }
-  equal(__, result, "What is the value of result?");
+  equal(2, result, "What is the value of result?");
 });
 
 //Assignment operators are available for multiplication and division as well
@@ -43,5 +43,5 @@ test("modulus", function() {
   var x = 5;
   //again this is exactly the same as result = result % x
   result %= x;
-  equal(__, result, "What is the value of result?");
+  equal(0, result, "What is the value of result?");
 });
diff --git a/topics/about_strings.js b/topics/about_strings.js
diff --git a/topics/about_this.js b/topics/about_this.js
diff --git a/topics/about_truthyness.js b/topics/about_truthyness.js
