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Setting variable to NULL after free
...dangling pointer is accessed after it is freed, you may read or overwrite random memory. If a null pointer is accessed, you get an immediate crash on most systems, telling you right away what the error is.
For local variables, it may be a little bit pointless if it is "obvious" that the pointer isn...
List all files and directories in a directory + subdirectories
I want to list every file and directory contained in a directory and subdirectories of that directory. If I chose C:\ as the directory, the program would get every name of every file and folder on the hard drive that it had access to.
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Unix command to prepend text to a file
Is there a Unix command to prepend some string data to a text file?
16 Answers
16
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How to check that a string is a palindrome using regular expressions?
...d about finite state machines. A finite state machine is composed of nodes and edges. Each edge is annotated with a letter from a finite alphabet. One or more nodes are special "accepting" nodes and one node is the "start" node. As each letter is read from a given word we traverse the given edge in ...
What is the difference between CurrentCulture and CurrentUICulture properties of CultureInfo in .NET
...operties both returning values of the CultureInfo type: CurrentCulture and CurrentUICulture .
5 Answers
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Regular expression to match a line that doesn't contain a word
I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v ). However, is it possible to match lines that do not contain a specific word, e.g. hede , using a regular expression?
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Thread pooling in C++11
...r function with an infinite loop, constantly waiting for new tasks to grab and run.
Here is how to attach such function to the thread pool:
int Num_Threads = thread::hardware_concurrency();
vector<thread> Pool;
for(int ii = 0; ii < Num_Threads; ii++)
{ Pool.push_back(thread(Infinite_loop...
Create array of regex matches
...an the below if you can assume Java >= 9)
You need to create a matcher and use that to iteratively find matches.
import java.util.regex.Matcher;
import java.util.regex.Pattern;
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List<String> allMatches = new ArrayList<String>();
Matcher m = Pattern.compile("your regular ex...
What's the difference between window.location and document.location in JavaScript?
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+1 but also see the answers by Phil Hamer and Christoph below, they add essential background info and caveats to fully understand the issue.
– Jon z
Oct 31 '14 at 19:12
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How to define a circle shape in an Android XML drawable file?
...problems finding the documentation of the definitions of shapes in XML for Android. I would like to define a simple circle filled with a solid color in an XML File to include it into my layout files.
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