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What does ~~ (“double tilde”) do in Javascript?
I was checking out an online game physics library today and came across the ~~ operator. I know a single ~ is a bitwise NOT, would that make ~~ a NOT of a NOT, which would give back the same value, wouldn't it?
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How do I use a custom deleter with a std::unique_ptr member?
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Assuming that create and destroy are free functions (which seems to be the case from the OP's code snippet) with the following signatures:
Bar* create();
void destroy(Bar*);
You can write your class Foo like this
class Foo {
std::unique_ptr<Bar, void...
How to trim a file extension from a String in JavaScript?
For example, assuming that x = filename.jpg , I want to get filename , where filename could be any file name (Let's assume the file name only contains [a-zA-Z0-9-_] to simplify.).
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How to get the build/version number of your Android application?
...kept getting an empty string for BuildConfig.VERSION_NAME because I wasn't setting the versionName in my Grade build file (I migrated from ANT to Gradle). So, here are instructions for ensuring you're setting your VERSION_NAME via Gradle.
build.gradle
def versionMajor = 3
def versionMinor = 0
def ...
getViewTypeCount and getItemViewType methods of ArrayAdapter
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Can you split a stream into two streams?
I have a data set represented by a Java 8 stream:
10 Answers
10
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How to get a key in a JavaScript object by its value?
...entation, this probably takes O(n) space since keys() materializes the key set.
– David Ehrmann
Oct 19 '17 at 1:04
2
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In Matlab, when is it optimal to use bsxfun?
...eading them again just to add them. Since memory bandwidth is a valuable asset and often the bottleneck on todays architectures, you want to use it wisely and decrease the memory requirements of your code to improve the performance.
bsxfun allows you to do just that: create a matrix based on applyi...
In C++, what is a “namespace alias”?
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Generating Guids in Ruby
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As of Ruby 1.9, uuid generation is built-in. Use the SecureRandom.uuid function.
For example:
require 'securerandom'
SecureRandom.uuid # => "96b0a57c-d9ae-453f-b56f-3b154eb10cda"
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