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Append values to a set in Python
...orevalue = ...whatever...
keep.add(onemorevalue)
But, of course, doing it in bulk with a single .update call is faster and handier, when otherwise feasible.
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Running Command Line in Java [duplicate]
Is there a way to run this command line within a Java application?
8 Answers
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Tools for analyzing performance of a Haskell program
...t of Real World Haskell.
GC Statistics
Firstly, ensure you're compiling with ghc -O2. And you might make sure it is a modern GHC (e.g. GHC 6.12.x)
The first thing we can do is check that garbage collection isn't the problem.
Run your program with +RTS -s
$ time ./A +RTS -s
./A +RTS -s
749700
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throw new std::exception vs throw std::exception
...to throw and catch exceptions is to throw an exception object and to catch it by reference (usually const reference). The C++ language requires the compiler to generate the appropriate code to construct the exception object and to properly clean it up at the appropriate time.
Throwing a pointer to ...
Using a custom image for a UITableViewCell's accessoryView and having it respond to UITableViewDeleg
I'm using a custom drawn UITableViewCell, including the same for the cell's accessoryView . My setup for the accessoryView happens by the way of something like this:
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C library function to perform sort
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qsort() is the function you're looking for. You call it with a pointer to your array of data, the number of elements in that array, the size of each element and a comparison function.
It does its magic and your array is sorted in-place. An example follows:
#include <stdio....
F# development and unit testing?
I just got started with F#, which is my first functional language. I have been working quasi-exclusively with C#, and enjoy a lot how F# leads me to re-think how I write code. One aspect I find a bit disorienting is the change in the process of writing code. I have been using TDD for years in C# now...
Razor HtmlHelper Extensions (or other namespaces for views) Not Found
...ng in the PR or Beta, but if I create an extension method on HtmlHelper , it is not recognized in a Razor powered page:
8 ...
Resetting generator object in Python
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Another option is to use the itertools.tee() function to create a second version of your generator:
y = FunctionWithYield()
y, y_backup = tee(y)
for x in y:
print(x)
for x in y_backup:
print(x)
This could be beneficial from memory usage point ...
NSAttributedString add text alignment
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As NSAttributedString is primarily used with Core Text on iOS, you have to use CTParagraphStyle instead of NSParagraphStyle. There is no mutable variant.
For example:
CTTextAlignment alignment = kCTCenterTextAlignment;
CTParagraphStyleSetting alignmentSetting;
al...