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val-mutable versus var-immutable in Scala
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You should strive for referential transparency. What that means is that, if I have an expression "e", I could make a val x = e, and replace e with x. This is the property that mutability break. Whenever you need to make a design decision, maximize for referential transparency.
As a practical matt...
Best practice? - Array/Dictionary as a Core Data Entity Attribute [closed]
...into the array or dictionary (it's stored as a BLOB in the data store) and if the collections are large, you may have to move a lot of data to/from the data store (if it's an SQLite data store) just to read or modify a small part of the collection.
The alternative is to use Core Data to-many relati...
Why does ContentResolver.requestSync not trigger a sync?
...mber of steps to tell Android that you are capable of synchronizing a specific kind of content using a specific kind of account. It does this in the AndroidManifest.
1. Notify Android that your application package provides syncing
First off, in AndroidManifest.xml, you have to declare that you h...
Getting the parent of a directory in Bash
If I have a file path such as...
11 Answers
11
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How do you rename a Git tag?
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The colon in the push command removes the tag from the remote repository. If you don't do this, Git will create the old tag on your machine when you pull.
Finally, make sure that the other users remove the deleted tag. Please tell them (co-workers) to run the following command:
git pull --prune -...
Clear Application's Data Programmatically
...highly recommend using it in new applications:
import android.os.Build.*;
if (VERSION_CODES.KITKAT <= VERSION.SDK_INT) {
((ActivityManager)context.getSystemService(ACTIVITY_SERVICE))
.clearApplicationUserData(); // note: it has a return value!
} else {
// use old hacky way, w...
How to send a “multipart/form-data” with requests in python?
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Basically, if you specify a files parameter (a dictionary), then requests will send a multipart/form-data POST instead of a application/x-www-form-urlencoded POST. You are not limited to using actual files in that dictionary, however:
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Check if a string contains an element from a list (of strings)
...ut arguably less clear):
bool b = listOfStrings.Any(myString.Contains);
If you were testing equality, it would be worth looking at HashSet etc, but this won't help with partial matches unless you split it into fragments and add an order of complexity.
update: if you really mean "StartsWith", t...
Is there a builtin confirmation dialog in Windows Forms?
...to create a simple confirm dialog saying "Please check the information and if you're sure it's correct, click OK."
3 Answer...
How to create a custom exception type in Java? [duplicate]
... message)
{
super(message);
}
}
Usage:
try
{
if(word.contains(" "))
{
throw new WordContainsException();
}
}
catch(WordContainsException ex)
{
// Process message however you would like
}
...