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Objective-C: Property / instance variable in category
...untime.h>
static void *MyClassResultKey;
@implementation MyClass
- (NSString *)test {
NSString *result = objc_getAssociatedObject(self, &MyClassResultKey);
if (result == nil) {
// do a lot of stuff
result = ...;
objc_setAssociatedObject(self, &MyClassResultKey, result, O...
In Python, how do I indicate I'm overriding a method?
...
This is also nice for doc strings! overrides could copy the docstring of the overridden method if the overriding method doesn't have one of its own.
– letmaik
May 29 '14 at 10:20
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View HTTP headers in Google Chrome?
...that allows you to view request-, response headers and cookies without any extra clicks right after the page is loaded.
It also handles redirects. It comes with an unobtrusive micro-mode that only shows a hand picked selection of response headers and a normal mode that shows all the information.
h...
How to use phpexcel to read data and insert into database?
... not work. i had to replace $highestColumn = PHPExcel_Cell::columnIndexFromString($sheet->getHighestColumn()); with simple $sheet->getHighestColumn(). you may have a bug in the code as you try to get the column index from the string - BUT try to access it via $highestColumn.$row in the loop (w...
Test if lists share any items in python
...'t have to supply a set or frozenset as the first argument. I tried with a string and it worked (i.e.: any iterable will do).
– Aktau
Feb 11 '15 at 14:30
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How do I see the current encoding of a file in Sublime Text?
...has no BOM (byte-order mark), (b) the file contains only single-byte ASCII chars., (c) the file has not yet been saved by Sublime Text in this session. Once saved by ST , it then reports 'UTF8' until closed (on re-opening the guessing starts over).
– mklement0
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What is the difference between re.search and re.match?
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re.match is anchored at the beginning of the string. That has nothing to do with newlines, so it is not the same as using ^ in the pattern.
As the re.match documentation says:
If zero or more characters at the
beginning of string match the regular expression patt...
Scala: Nil vs List()
...t? Example - scala> Map(1 -> "hello", 2 -> "world").foldLeft(List[String]())( (acc, el) => acc :+ el._2) res1: List[String] = List(hello, world) Using Nil as the accumulator here wouldn't work.
– Kevin Meredith
Nov 17 '13 at 4:57
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Catch an exception thrown by an async void method
...{
if( i % 2 == 0 )
throw new ArgumentException(String.Format("Even argument {0}", i));
return i++;
}
});
t.Start();
return t;
}
When you observe the traces
22:25:12.649 02172/02820 { AsyncTest.Program.Run
22:25:12.656 02172/...
Is recursion ever faster than looping?
...is expressed using tail calls. Though that is sometimes slightly offset by extra complication in the tail version like extra parameters.
– Kaz
Jan 14 at 16:09
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