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Select 50 items from list at random to write to file
...use xrange as an argument.
This is especially fast and space efficient for sampling from a
large population: sample(xrange(10000000), 60)
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How to use range-based for() loop with std::map?
The common example for C++11 range-based for() loops is always something simple like this:
5 Answers
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How different is Objective-C from C++? [closed]
...l crash if you try to call a member function of nullptr
Objective-C allows for dynamic dispatch, allowing the class responding to a message to be determined at runtime, unlike C++ where the object a method is invoked upon must be known at compile time (see wilhelmtell's comment below). This is relat...
How can Bash execute a command in a different directory context?
...in very specific directories. There is only one executable sitting in /bin for this program, and the current working directory is very important for running it correctly. The script affects the files that live inside the directory it is run within.
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Difference between fmt.Println() and println() in Go
... in the standard library, which will persist. See the spec on that topic.
For language developers it is handy to have a println without dependencies, but the way to go is to use the fmt package or something similar (log for example).
As you can see in the implementation the print(ln) functions are...
recursively add file extension to all files
...o all the files contained within these directories. I've seen bash scripts for changing the file extension but not for just adding one. It also needs to be recursive, can someone help please?
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How can I extract the folder path from file path in Python?
...nction to do this, you just need to pass the string, and it'll do the work for you. Since, you seem to be on windows, consider using the abspath function too. An example:
>>> import os
>>> os.path.dirname(os.path.abspath(existGDBPath))
'T:\\Data\\DBDesign'
If you want both the f...
URLWithString: returns nil
...Encoding:NSUTF8StringEncoding];
NSString* stringURL = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@,Montréal,Communauté-Urbaine-de-Montréal,Québec,Canadae&output=csv&oe=utf8&sensor=false", webName];
NSString* webStringURL = [stringURL stringByAddingPercentEscapes...
How to format a number 0..9 to display with 2 digits (it's NOT a date)
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You can use:
String.format("%02d", myNumber)
See also the javadocs
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Singleton by Jon Skeet clarification
...vate members, including the private constructor here.
Read my article on beforefieldinit. You may or may not want the no-op static constructor - it depends on what laziness guarantees you need. You should be aware that .NET 4 changes the actual type initialization semantics somewhat (still within th...