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What does the `forall` keyword in Haskell/GHC do?
...here
val :: b
val = maybe onNothin onJust mval
This code doesn't compile (syntax error) in plain Haskell 98. It requires an extension to support the forall keyword.
Basically, there are 3 different common uses for the forall keyword (or at least so it seems), and each has its own ...
cancelling a handler.postdelayed process
...
I do this to post a delayed runnable:
myHandler.postDelayed(myRunnable, SPLASH_DISPLAY_LENGTH);
And this to remove it: myHandler.removeCallbacks(myRunnable);
...
Test if a string contains any of the strings from an array
How do I test a string to see if it contains any of the strings from an array?
14 Answers
...
.gitignore all the .DS_Store files in every folder and subfolder
...uld only need the following line in your root .gitignore file: .DS_Store. Don't forget the period!
git rm --cached .DS_Store
removes only .DS_Store from the current directory. You can use
find . -name .DS_Store -print0 | xargs -0 git rm --ignore-unmatch
to remove all .DS_Stores from the repo...
Backup/Restore a dockerized PostgreSQL database
I'm trying to backup/restore a PostgreSQL database as is explained on the Docker website, but the data is not restored.
10 ...
Inserting a PDF file in LaTeX
I am trying to insert a PDF or doc file as an appendix in my LaTeX file. Do you know how I can do this?
6 Answers
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Printing a variable memory address in swift
...afePointer to the storage used for `object`. There's
/// not much you can do with this other than use it to identify the
/// object
Swift 3
For Swift 3, use withUnsafePointer:
var str = "A String"
withUnsafePointer(to: &str) {
print(" str value \(str) has address: \($0)")
}
...
How to save/restore serializable object to/from file?
...ializableObject == null) { return; }
try
{
XmlDocument xmlDocument = new XmlDocument();
XmlSerializer serializer = new XmlSerializer(serializableObject.GetType());
using (MemoryStream stream = new MemoryStream())
{
seri...
Hidden features of Windows batch files
What are some of the lesser know, but important and useful features of Windows batch files?
91 Answers
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Should we pass a shared_ptr by reference or by value?
...
Here's Herb Sutter's take
Guideline: Don’t pass a smart pointer as a function parameter unless
you want to use or manipulate the smart pointer itself, such as to
share or transfer ownership.
Guideline: Express that a function will store and share owne...