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Using 'return' in a Ruby block
... * 7 }
value=42
=> nil
return always returns from method, but if you test this snippet in irb you don't have method, that's why you have LocalJumpError
break returns value from block and ends its call. If your block was called by yield or .call, then break breaks from this iterator too
next re...
What is the difference between Python's list methods append and extend?
...t thing is doing things the Right Way™.
It's conceivable that you might test timings on two comparable operations and get an ambiguous or inverse result. Just focus on doing the semantically correct thing.
Conclusion
We see that extend is semantically clearer, and that it can run much faster th...
How to force NSLocalizedString to use a specific language
...Languages"];
Works even with consecutive language hopping like:
NSLog(@"test %@", NSLocalizedStringFromTableInBundle(@"NewKey", nil, currentLanguageBundle, @""));
[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObject:@"fr"] forKey:@"AppleLanguages"];
NSLog(@"test %@", NSLocali...
How to re import an updated package while in Python Interpreter? [duplicate]
I often test my module in the Python Interpreter, and when I see an error, I quickly update the .py file. But how do I make it reflect on the Interpreter ? So, far I have been exiting and reentering the Interpreter because re importing the file again is not working for me.
...
How to check if a Unix .tar.gz file is a valid file without uncompressing?
...per comment. Thanks zrajm!
Edit as per comment. Thanks Frozen Flame! This test in no way implies integrity of the data. Because it was designed as a tape archival utility most implementations of tar will allow multiple copies of the same file!
...
Two-way encryption: I need to store passwords that can be retrieved
...se. Any idea why? $x = new Encryption(MCRYPT_BlOWFISH, MCRYPT_MODE_CBC); $test = $x->encrypt("test", "a"); echo var_dump($x->decrypt($test, "a"));
– The Wavelength
Dec 14 '12 at 21:52
...
(How) can I count the items in an enum?
...ax()
specialization (possibly constexpr if you use c++11). Then, in your test code provide any static assertions to maintain the constraints that std::numeric_limits::max() = last_item.
share
|
im...
Swift: #warning equivalent
...e to use #warning again like so:
#warning("TODO: Clean up this code after testing")
This will show up as a warning in Xcode just as expected!
This works even in combination with #if checks, for example the following will only show a warning if your target platform is iOS:
#if os(iOS)
#warni...
What techniques can be used to speed up C++ compilation times?
...ion3>;
This technique can save you time if you are compiling different tests with a common set of instantiations.
NOTE : MPICH2 ignores the explicit instantiation at this point and always compiles the instantiated classes in all compilation units.
Use unity builds
The whole idea behind unity b...
Make sure only a single instance of a program is running
...code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is available singleton.py. Please file bugs here.
...