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Weak and strong property setter attributes in Objective-C
What is the difference between weak and strong property setter attributes in Objective-C?
5 Answers
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How can I generate a diff for a single file between two branches in github
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You can also use this Chrome extension github.com/danielribeiro/github-diff-highlight-extension to get syntax highlight when comparing branches.
– Daniel Ribeiro
Oct 24 '13 at 0:11
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Manually raising (throwing) an exception in Python
... raise error.with_traceback(sys.exc_info()[2])
Again: avoid manually manipulating tracebacks. It's less efficient and more error prone. And if you're using threading and sys.exc_info you may even get the wrong traceback (especially if you're using exception handling for control flow - which I'd...
How to specify maven's distributionManagement organisation wide?
I'm trying to figure out how to organize many (around 50+) maven2 projects, so that they can deploy into a central nexus repository. When using the mvn deploy goal, one does need to specify the target in the distributionManagement tag like this:
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Difference between this and self in JavaScript
...et to the global object (rule 2 above).
"self" has no special syntactic meaning, it is just an identifier. Browsers tend to define window.self (just a property of the global window object) = window. This results in unqualified references to "self" being the same as "window" UNLESS "self" has been r...
Is unsigned integer subtraction defined behavior?
...n is correct. Unsigned arithmetic follow the rules of modulo arithmetic, meaning that 0x0000 - 0x0001 evaluates to 0xFFFF for 32-bit unsigned types.
However, the second interpretation (the one based on "signed semantics") is also required to produce the same result. I.e. even if you evaluate 0 - 1 ...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
John Carmack has a special function in the Quake III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why t...
Using build types in Gradle to run same app that uses ContentProvider on one device
...es {
debug {
applicationIdSuffix ".debug"
}
}
In AndroidManifest.xml file set android:authorities property of your ContentProvider:
<provider
android:name="com.example.app.YourProvider"
android:authorities="${applicationId}.provider"
android:enabled="true"
androi...
Improving bulk insert performance in Entity framework [duplicate]
I want to insert 20000 records in a table by entity framework and it takes about 2 min. Is there any way other than using SP to improve its performance. This is my code:
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Is it bad practice to have a constructor function return a Promise?
I'm trying to create a constructor for a blogging platform and it has many async operations going on inside. These range from grabbing the posts from directories, parsing them, sending them through template engines, etc.
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