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Objective-C: Property / instance variable in category
... you'd only have a single storage slot. So if you wanted to use this on multiple instances and have each instance compute a distinct value, it wouldn't work.
Fortunately, the Objective-C runtime has this thing called Associated Objects that can do exactly what you're wanting:
#import <objc/run...
Why does the C++ map type argument require an empty constructor when using []?
...p does not already
contain such an object, operator[]
inserts the default object
data_type().
If you don't have default constructor you can use insert/find functions.
Following example works fine:
myMap.insert( std::map< int, MyClass >::value_type ( 1, MyClass(1) ) );
myMap.find( 1 )-...
What is a regular expression for a MAC Address?
...port for character range collation varies among implementation, so the result may vary.
– nhahtdh
May 6 '15 at 3:14
...
Can a Byte[] Array be written to a file in C#?
...
Try BinaryReader:
/// <summary>
/// Convert the Binary AnyFile to Byte[] format
/// </summary>
/// <param name="image"></param>
/// <returns></returns>
public static byte[] ConvertANYFileToBytes(HttpPostedFileBas...
Convert hex string to int in Python
...
>>> int(string_2, 0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 0: 'ffff'
literals:
If you're typing into source code or an interpreter, Python will make the conversion for you:
>>> integer ...
Indexes of all occurrences of character in a string
... actually my first day with Java so I'm a little confused by the final result, this seems to output -1 at the end an I don't quite understand why! thanks!!
– Trufa
Feb 17 '11 at 20:55
...
Null vs. False vs. 0 in PHP
...ything, but 0 if it has found something at the beginning of the string !
<?php
// pitfall :
if (strrpos("Hello World", "Hello")) {
// never exectuted
}
// smart move :
if (strrpos("Hello World", "Hello") !== False) {
// that works !
}
?>
And of course, if you deal with states:
Yo...
Where are shared preferences stored?
...data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PREFS_NAME.xml
or the default preferences at:
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PACKAGE_NAME_preferences.xml
SharedPreferences added during runtime are not stored in the Eclipse project.
Note: Accessing /data/data/<package_name> ...
Regex for splitting a string using space when not surrounded by single or double quotes
... if the capturing group didn't match (an unquoted word was matched).
List<String> matchList = new ArrayList<String>();
Pattern regex = Pattern.compile("[^\\s\"']+|\"([^\"]*)\"|'([^']*)'");
Matcher regexMatcher = regex.matcher(subjectString);
while (regexMatcher.find()) {
if (regexMa...
Check OS version in Swift?
...ndationVersionNumber_iOS_7_1)
let iOS7 = floor(NSFoundationVersionNumber) <= floor(NSFoundationVersionNumber_iOS_7_1)
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