33 lines
1010 B
Plaintext
33 lines
1010 B
Plaintext
Defining a object's methods inside the object itself means that a new instance of the function is created for each instantiation of the object, bloating the instances.
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Instead, it is more efficient to define the functions outside the object using the ``++prototype++`` keyword. This yields a single instance of each function, to which all the objects of that type refer.
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== Noncompliant Code Example
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----
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function Person(firstName, middleInitial, lastName) {
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this.firstName = firstName;
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this.middleInitial = middleInitial;
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this.lastName = lastName;
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this.nameReversed = function() { // Noncompliant
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return this.lastName + ", " + this.firstName + " " + this.middleInitial;
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}
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}
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----
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== Compliant Solution
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----
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function Person(firstName, middleInitial, lastName) {
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this.firstName = firstName;
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this.middleInitial = middleInitial;
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this.lastName = lastName;
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}
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Person.prototype.nameReversed = function() {
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return this.lastName + ", " + this.firstName + " " + this.middleInitial;
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}
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----
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