Do I need to manually free allocated memory, or does JavaScript have a garbage collector?
Is it acceptable to use this code snippet in JavaScript?
function fillArray()
{
var c = new Array;
c.push(3);
c.push(2);
return c;
}
var arr = fillArray();
var d = arr.pop()
Thank you for your help.
As stated in the Apple JavaScript Coding Guidelines:
The guideline emphasizes the importance of using delete statements when creating objects with new statements. By pairing them together, it ensures that all memory associated with the object, including its properties, is readily available for garbage collection. Further information on the use of delete statements can be found in the section titled "Freeing Objects."
It is recommended to utilize a delete command to allow the garbage collector to release the memory allocated for your Array once you have finished using it. Keep in mind that unlike C/C++, where delete immediately frees up memory, the behavior differs as the delete statement only removes a reference.
JavaScript handles memory management automatically through a garbage collector (GC).
You can't manually delete the variables x and y, but you can clear their values by assigning them to null to allow the GC to free up memory.
y = null;
x = null;
Keep in mind that the delete keyword is only used for deleting object properties, not variables.
The variables arr and d will remain in existence as global variables until they are picked up by the Garbage Collector.
These variables will be stored as properties on the global object, specifically window, when working in a browser environment. However, being declared with var, they cannot be removed from the global object.
In your specific scenario, it may be beneficial to set these variables to null once you no longer need them. Another approach could involve restricting their scope within a function and performing necessary actions within that function.
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