Copy-constructor test in Javascript
After posting about assigning objects in Python only copies the reference and does not clone the object, I wanted to verify if the behavior happened in Javascript. Here is the code:
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var myClass = function() {
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this.text = '';
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this.say = function() {
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console.log(this.text);
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}
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}
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var A = new myClass();
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var B = new myClass();
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A.text = 'testing A';
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B.text = 'texting B';
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A.say();
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B.say();
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A = B;
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A.say();
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B.say();
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A.text = 'testing A2';
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A.say();
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B.say();
Here is the output:
testing A texting B texting B texting B testing A2 testing A2
Both A and B end up pointing to the same instance in memory, while the old A instance is inaccessible.
Demo: http://code.enekoalonso.com/js/tests/copy-constructor-test.html