55 lines
1.3 KiB
Plaintext
55 lines
1.3 KiB
Plaintext
== Why is this an issue?
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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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[source,javascript]
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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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[source,javascript]
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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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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::message.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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