References in JavaScript (consistent with C)

References in JavaScript (consistent with C)

 

Javascript can be used as an object-orientedProgramming LanguageAnd has the characteristics of object-oriented language.

Here we will talk about the referenced features

 

References can be used in JS to demonstrate the same performance as the C # language.

Instance 1:

VaR obj1 = new object ()

VaR obj2 = obj1;

Obj1.name = "Hello World ";

Alert (obj2.name = obj1.name) // The value is true.

 

Instance 2:

VaR Item1 = new array ('A', 'B', 'C ');

VaR item2 = Item1;

Item1.push ('D ');

Alert (item2.length) // you will find that = 4 is consistent with Item1

 

Instance 3: String instance

VaR str1 = 'hello ';

VaR str2 = str1;

Str1 + = 'World ';

Alert (str2); // It is still hello.

 

The performance in this region is the same as that in C #. Each concatenation or modification of a string object will generate a new object. The original object will be invalid or has no reference.

 

 

 

 

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