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What does the “Just” syntax mean in Haskell?
...nalysis of values that belong to types with more than one constructor.
In order to use a Maybe a value in a pattern match, you need to provide a pattern for each constructor, like so:
case maybeVal of
Nothing -> "There is nothing!"
Just val -> "There is a value, and it is " ++ (sh...
Checking if all elements in a list are unique
What is the best way (best as in the conventional way) of checking whether all elements in a list are unique?
14 Answers
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How to disable/enable the sleep mode programmatically in iOS?
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For example, if you need it until you leave the view you can set it back by overriding the viewWillDisappear:
override func viewWillDisappear(_ animated: Bool) {
UIApplication.shared.isIdleTimerDisabled = false
}
More about UIApplication Class.
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javac error: Class names are only accepted if annotation processing is explicitly requested
...to the file name in this line:
javac -cp /home/manish.yadav/Desktop/JCuda-All-0.3.2-bin-linux-x86_64 EnumDevices
From the official faq:
Class names, 'HelloWorldApp', are only accepted if annotation processing is explicitly requested
If you receive this error, you forgot to include the .j...
Creating a BLOB from a Base64 string in JavaScript
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An explanation would be in order. E.g., why does it have higher performance?
– Peter Mortensen
Apr 13 at 14:02
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Get type of a generic parameter in Java with reflection
...our generics.
Line 6 gets the array of types mapped into our generics, in order as declared in the class code. For this example we pull out the first parameter. This comes back as a Type.
Line 2 casts the final Type returned to a Class. This is safe because we know what types our generic type p...
Why does this code using random strings print “hello world”?
...bis why? i mean Random() should return random number every time, not a fix ordered number set?
– roottraveller
Mar 7 '17 at 7:22
5
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Install Gem from Github Branch?
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You don't need to build the gem locally. In your gemfile you can specify a github source with a ref, branch or tag.
gem 'rails', :git => "git://github.com/rails/rails.git", :ref => "4aded"
gem 'rails', :git => "git://github.com/rails/rails.git", :bra...
Explicitly set Id with Doctrine when using “AUTO” strategy
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New solution works fine only when ALL entities have id before insert. When one entity has ID and another one does not - new solution is failing.
I use this function for import all my data:
function createEntity(\Doctrine\ORM\EntityManager $em, $entity, $id ...
How can I make git ignore future revisions to a file?
...s must be deterministic in that applying them multiple times, in different orders will be the equivalent of just running the last one in the sequence.
The same can be applied with passwords if you need to expose your repository but the contents may contain sensitive information.
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