JavaScript_Succinctly

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myObject.prop = 'test'; myArray.prop = 'test'; myFunction.prop = 'test'; myRegExp.prop = 'test'; // Logs 'test', 'test', 'test', 'test', 'test', 'test', 'test'. console.log(myString.prop, myNumber.prop, myBoolean.prop, myObject.prop, myArray.prop, myFunction.prop, myRegExp.prop); // Be aware: Instance properties do not work with primitive/literal values. var myString = 'string'; var myNumber = 1; var myBoolean = true; myString.prop = true; myNumber.prop = true; myBoolean.prop = true; // Logs undefined, undefined, undefined. console.log(myString.prop, myNumber.prop, myBoolean.prop); Adding properties to objects created from a constructor function sometimes occurs. Remember, object instances created from constructor functions are just plain old objects. Notes Keep in mind that besides their own properties, instances can have properties inherited from the prototype chain. Or, as we just saw in the previous code sample, properties added to the constructor after instantiation. This highlights the dynamic nature of objects in JavaScript. The semantics of "JavaScript objects" and "Object() objects" Do not confuse the general term "JavaScript objects," which refers to the notion of objects in JavaScript, with Object() objects. An Object() object (e.g., var myObject = new Object()) is a very specific type of value expressed in JavaScript. Just as an Array() object is a type of object called array, an Object() object is a type of object called object. The gist is that the Object() constructor function produces an empty generic object container, which is referred to as an Object() object. Similarly, the Array() constructor function produces an array object, and we refer to these objects as Array() objects. 44
In this book, the term "JavaScript objects" is used to refer to all objects in JavaScript, because most of the values in JavaScript can act like objects. This is due to the fact that the majority of JavaScript values are created from a native constructor function which produces a very specific type of object. What you need to remember is that an Object() object is a very specific kind of value. It’s a generic empty object. Do not confuse this with the term "JavaScript objects" used to refer to most of the values that can be expressed in JavaScript as an object. 45
Page 2 and 3: By Cody Lindley Foreword by Daniel
Page 4 and 5: Table of Contents About the Author
Page 6 and 7: Object() object instance properties
Page 8 and 9: The Story behind the Succinctly Ser
Page 10 and 11: About the Author Cody Lindley is a
Page 12 and 13: Advanced technical books written ab
Page 14 and 15: “Consider that the cody object cr
Page 16 and 17: Chapter 1 JavaScript Objects Creati
Page 18 and 19: Using JavaScript, the getGender met
Page 20 and 21: * The String() constructor function
Page 22 and 23: new object that is returned from th
Page 24 and 25: Notes The Math object is the oddbal
Page 26 and 27: In this snippet, we created a new s
Page 28 and 29: Verify that literals are created fr
Page 30 and 31: The primitive values null, undefine
Page 32 and 33: The concept to take away here is th
Page 34 and 35: * This will throw an error and not
Page 36 and 37: 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 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 88 and 89: Logs 'foo', being found at Object.p
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
Page 138 and 139:
while (myArrayLength--) { // If len
Page 140 and 141:
ceil() cos() exp() floor() log() ma
Page 142 and 143:
That is: a complex value is equal t
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