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Which equals operator (== vs ===) should be used in JavaScript comparisons?
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var1 == var2
When using == for JavaScript equality testing, some
funky conversions take place.
Moral of the story:
Use === unless you fully understand the
conversions that take place with ==.
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What issues should be considered when overriding equals and hashCode in Java?
...flow when the implementation class doesn't override the equals method. not fun.
– Ran Biron
Dec 6 '10 at 19:16
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How can I measure the speed of code written in PHP? [closed]
...you want to benchmark a couple of instructions ; like compare two types of functions, for instance -- it's better if done thousands of times, to make sure any "perturbating element" is averaged.
Something like this, so, if you want to know how long it take to serialize an array :
$before = microti...
Swift equivalent for MIN and MAX macros
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min and max are already defined in Swift:
func max<T : Comparable>(x: T, y: T, rest: T...) -> T
func min<T : Comparable>(x: T, y: T, rest: T...) -> T
See this great writeup on documented & undocumented built-in functions in Swift.
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What is the exact problem with multiple inheritance?
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The most obvious problem is with function overriding.
Let's say have two classes A and B, both of which define a method doSomething. Now you define a third class C, which inherits from both A and B, but you don't override the doSomething method.
When the c...
Why can't the tag contain a tag inside it?
... authoritative documents we have for things like this, because they aren't fun to read. +1 for actually reading them, understanding them, and using them to answer questions.
– Stoutie
Oct 2 '12 at 17:18
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Generating random integer from a range
I need a function which would generate a random integer in given range (including border values). I don't unreasonable quality/randomness requirements, I have four requirements:
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Position: absolute and parent height?
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How can I create directory tree in C++/Linux?
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With C++17 or later, there's the standard header <filesystem> with
function
std::filesystem::create_directories
which should be used in modern C++ programs.
The C++ standard functions do not have the POSIX-specific explicit
permissions (mode) argument, though.
However, here's a C function t...
Why 0 is true but false is 1 in the shell?
... if you want to. A lot of APIs and frameworks have a similar convention - functions that succeed return 0 and and those that fail give back an error code describing the particular failure case.
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