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UITextField text change event
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From proper way to do uitextfield text change call back:
I catch the characters sent to a UITextField control something like this:
// Add a "textFieldDidChange" notification method to the text field control.
In Objective-C:
[textField addTarget:self
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What is content-type and datatype in an AJAX request?
... That's what I like about SO...get rep for stating the obvious... >_<
– Christoph
Sep 9 '13 at 15:40
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Multiple line code example in Javadoc comment
I have a small code example I want to include in the Javadoc comment for a method.
15 Answers
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How to use regex in String.contains() method in Java
... you don't get a match for restores store products. Note that stores 3store_product is also rejected, since digit and _ are considered part of a word, but I doubt this case appear in natural text.
Since word boundary is checked for both sides, the regex above will search for exact words. In other w...
Breaking up long strings on multiple lines in Ruby without stripping newlines
...lution in Ruby 2.3: The squiggly heredoc.
class Subscription
def warning_message
<<~HEREDOC
Subscription expiring soon!
Your free trial will expire in #{days_until_expiration} days.
Please update your billing information.
HEREDOC
end
end
Blog post link: https:/...
Setting action for back button in navigation controller
...; Bool
}
extension UINavigationController {
public func navigationBar(_ navigationBar: UINavigationBar, shouldPop item: UINavigationItem) -> Bool {
// Prevents from a synchronization issue of popping too many navigation items
// and not enough view controllers or viceversa fr...
warning: [options] bootstrap class path not set in conjunction with -source 1.5
...va
On UNIX systems, locate rt.jar using:
locate -r '/rt.jar$'
Set JAVA_HOME so that rt.jar is located at $JAVA_HOME/jre/lib/rt.jar, then:
javac -source 1.7 -bootclasspath "$JAVA_HOME/jre/lib/rt.jar" Main.java
Tested on Ubuntu 14.04 for Oracle Java 7 and 8.
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postgresql COUNT(DISTINCT …) very slow
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You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_name FROM table_name) AS temp;
This is much faster than:
COUNT(DISTINCT column_name)
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Applications are expected to have a root view controller at the end of application launch
... make sure self.window is initialized like self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
– Raptor
Feb 13 '12 at 12:07
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Types in Objective-C on iOS
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This is a good overview:
http://reference.jumpingmonkey.org/programming_languages/objective-c/types.html
or run this code:
32 bit process:
NSLog(@"Primitive sizes:");
NSLog(@"The size of a char is: %d.", sizeof(char));
NSLog(@"The size of short is: %d.", sizeof(short));
NSLog(@"The si...