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Why is @autoreleasepool still needed with ARC?
...ample of using an auto release pool:
- (void)useALoadOfNumbers {
for (int j = 0; j < 10000; ++j) {
@autoreleasepool {
for (int i = 0; i < 10000; ++i) {
NSNumber *number = [NSNumber numberWithInt:(i+j)];
NSLog(@"number = %p", number);
...
When should we implement Serializable interface?
...
Implement the Serializable interface when you want to be able to convert an instance of a class into a series of bytes or when you think that a Serializable object might reference an instance of your class.
Serializable classes are useful when you want to persist instances of them or send ...
What's the difference between and
...bject.)
Source: http://download.oracle.com/javase/tutorial/extra/generics/convert.html; it explains why the JDK's java.util.Collections class has a method with this signature:
public static <T extends Object & Comparable<? super T>> T max(
Collection<? extends T> coll
)
...
Class with single method — best approach?
...not pose any risk to bloat are excellent cases for static methods - System.Convert as an example. If your project is a one-off with no requirements for future maintenance, the overall architecture really isn't very important - static or non static, doesn't really matter - development speed does, how...
What does 'wb' mean in this code, using Python?
...ode the text based on the default text encoding. Additionally, Python will convert line endings (\n) to whatever the platform-specific line ending is, which would corrupt a binary file like an exe or png file.
Text mode should therefore be used when writing text files (whether using plain text or a...
How to get a time zone from a location using latitude and longitude coordinates?
...st of the methods listed will return an IANA time zone id. If you need to convert to a Windows time zone for use with the TimeZoneInfo class in .NET, use the TimeZoneConverter library.
Don't use zone.tab
The tz database includes a file called zone.tab. This file is primarily used to present a list...
Using a custom typeface in Android
...
@CommonsWare: I don't necessarily agree. Typeface is a integral part of UI Styling like you do with backgrounds images etc. And size is not necessarily big always. For instance, the font in my case is just 19.6KB :)
– Codevalley
Jun 6 '10 at...
When to encode space to plus (+) or %20?
...ions, URLs are covered entirely by RFC3986, which means spaces ought to be converted to '%20'. And definitely that should be the case if you are requesting anything other than an HTML document.
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How to create local notifications?
...Key:UIApplicationLaunchOptionsLocalNotificationKey];
// Override point for customization after application launch.
return YES;
}
// This code block is invoked when application is in foreground (active-mode)
-(void)application:(UIApplication *)application didReceiveLocalNot...
Printf width specifier to maintain precision of floating-point value
Is there a printf width specifier which can be applied to a floating point specifier that would automatically format the output to the necessary number of significant digits such that when scanning the string back in, the original floating point value is acquired?
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