JavaScript_Succinctly

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Logs 'foo', being found at Object.prototype.foo via the prototype chain. console.log(myString.foo); Notes Careful! Anything added to Object.prototype will show up in a for in loop and the prototype chain. Because of this, it’s been said that changing Object.prototype is forbidden. 88
Chapter 11 Function() Conceptual overview of using Function() objects A function is a container of code statements that can be invoked using the parentheses () operator. Parameters can be passed inside of the parentheses during invocation so that the statements in the function can access certain values when the function is invoked. In the following code, we create two versions of an addNumbers function object—one using the new operator and another using the more common literal pattern. Both are expecting two parameters. In each case, we invoke the function, passing parameters in the parentheses () operator. Sample: sample76.html var addNumbersA = new Function('num1', 'num2', 'return num1 + num2'); console.log(addNumbersA(2, 2)); // Logs 4. // Could also be written the literal way, which is much more common. var addNumbersB = function (num1, num2) { return num1 + num2; }; console.log(addNumbersB(2, 2)); // Logs 4. A function can be used to return a value, construct an object, or as a mechanism to simply run code. <strong>JavaScript</strong> has several uses for functions, but in its most basic form a function is simply a unique scope of executable statements. Function() parameters The Function() constructor takes an indefinite number of parameters, but the last parameter expected by the Function() constructor is a string containing statements that comprise the body of the function. Any parameters passed to the constructor before the last will be available to the function being created. It’s also possible to send multiple parameters as a comma-separated string. In the following code, I contrast the usage of the Function() constructor with the more common patterns of instantiating a function object. 89
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By Cody Lindley Foreword by Daniel
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Table of Contents About the Author
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Object() object instance properties
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The Story behind the Succinctly Ser
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About the Author Cody Lindley is a
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Advanced technical books written ab
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“Consider that the cody object cr
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Chapter 1 JavaScript Objects Creati
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Using JavaScript, the getGender met
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* The String() constructor function
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new object that is returned from th
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Notes The Math object is the oddbal
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In this snippet, we created a new s
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Verify that literals are created fr
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The primitive values null, undefine
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The concept to take away here is th
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* This will throw an error and not
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copied, but not the actual value. T
Page 38 and 39: Sample: sample21.html // Primitive
Page 40 and 41: Notes Careful! If you mutate the na
Page 42 and 43: console.log(instanceOfCustomObject.
Page 44 and 45: myObject.prop = 'test'; myArray.pro
Page 46 and 47: Chapter 2 Working with Objects and
Page 48 and 49: Sample: sample31.html // Encapsula
Page 50 and 51: cody['getGender']() // Just slap th
Page 52 and 53: een defined. You might think that b
Page 54 and 55: console.log(myArray.toLocaleString(
Page 56 and 57: Sample: sample44.html var cody = {
Page 58 and 59: Sometimes a web browser manufacture
Page 60 and 61: I like this library because it take
Page 62 and 63: console.log(stringObject); // Logs
Page 64 and 65: Chapter 4 Number() Conceptual overv
Page 66 and 67: NEGATIVE_INFINITY POSITIVE_INFINIT
Page 68 and 69: Parameter passed to Boolean() = Mat
Page 70 and 71: console.log(Boolean(Math)); console
Page 72 and 73: var numberObject = new Number(1.100
Page 74 and 75: Chapter 7 Null Conceptual overview
Page 76 and 77: Chapter 8 Undefined Conceptual over
Page 78 and 79: Chapter 9 The Head/Global Object Co
Page 80 and 81: object. } // Logs bar, foo's value
Page 82 and 83: Make sure you understand that the h
Page 84 and 85: Object() parameters The Object() co
Page 86 and 87: Sample: sample72.html var cody = n
Page 90 and 91: Sample: sample77.html var addFunct
Page 92 and 93: Sample: sample79.html var yelp = f
Page 94 and 95: parameters when defining the functi
Page 96 and 97: Notes The arguments.length property
Page 98 and 99: Invoking a function (function, meth
Page 100 and 101: Self-invoking anonymous function st
Page 102 and 103: the bar variable. All this is to sh
Page 104 and 105: Chapter 12 The this Keyword Concept
Page 106 and 107: Clearly, the value of this is based
Page 108 and 109: Working around the nested function
Page 110 and 111: What you need to learn here is that
Page 112 and 113: var john = new Person(); // No argu
Page 114 and 115: Notes An unlimited number of functi
Page 116 and 117: } (); How is the value of sayHiTex
Page 118 and 119: var parentFunction = function () {
Page 120 and 121: Chapter 14 Function Prototype Prope
Page 122 and 123: Sample: sample119.html var myFunct
Page 124 and 125: In this example, the foo property i
Page 126 and 127: console.log(FooInstance.constructor
Page 128 and 129: Providing a new object as the proto
Page 130 and 131: var chuck = new Person(0, 0); conso
Page 132 and 133: An Array() is just a special type o
Page 134 and 135: It is more common to see an array d
Page 136 and 137: console.log(myArray.length); // Log
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while (myArrayLength--) { // If len
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ceil() cos() exp() floor() log() ma
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That is: a complex value is equal t
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JavaScript_Succinctly

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