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How does one write code that best utilizes the CPU cache to improve performance?
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@javapowered The compiler may be able to do that depending on the language, though I'm not sure if any of them do. The reason you can't do it in C is that it's perfectly valid to address members by base address+offset rather t...
How to overload functions in javascript?
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There are multiple aspects to argument overloading in Javascript:
Variable arguments - You can pass different sets of arguments (in both type and quantity) and the function will behave in a way that matches the arguments passed to it.
Default arguments - You can define a defau...
Why is it bad style to `rescue Exception => e` in Ruby?
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so it's like catching Throwable in java
– ratchet freak
Apr 7 '12 at 0:15
53
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What is recursion and when should I use it?
...mentations (i.e. every major implementation of C, C++, Basic, Python, Ruby,Java, and C#) iteration is vastly preferable to recursion.
To see why, walk through the steps that the above languages use to call a function:
space is carved out on the stack for the function's arguments and local variabl...
How to check whether a pandas DataFrame is empty?
... In Python, try/except is cheap and if is expensive. Python is neither Java nor C; here it's Easier to Ask Forgiveness than Permission
– Nick Marinakis
Apr 14 at 1:26
add ...
What is the most appropriate way to store user settings in Android application
... API level 8 (2.2) and later. You can use iharder.sourceforge.net/current/java/base64 or something else for earlier OSs.
– emmby
Jun 20 '11 at 22:19
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Is JavaScript guaranteed to be single-threaded?
JavaScript is known to be single-threaded in all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded?
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Python Infinity - Any caveats?
...te 4: be careful to rely on any of the above, as Python relies on the C or Java library it was compiled for and not all underlying systems implement all this behavior correctly. If you want to be sure, test for infinity prior to doing your calculations.
¹) Recently means since version 3.2.
²) Flo...
Arrays, heap and stack and value types
...about reference and value types. This is something probably every .NET and Java developer struggled with.
An array is just a list of values. If it's an array of a reference type (say a string[]) then the array is a list of references to various string objects on the heap, as a reference is the val...
REST API 404: Bad URI, or Missing Resource?
...CTED ERRORS, BETTER IF YOU DO NOT SEE IT IN THE LOG");
}
BUT, because my Java or JavaScript client can receive two kind of HTTP 404 somehow I need to check the body of the response in case of HTTP 404. If I can parse the response body then I am sure I got back a response where there was no data to...