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Why it's not possible to use regex to parse HTML/XML: a formal explanation in layman's terms
... fact that a test of whether a string matches the pattern can be performed by a finite automaton (one different automaton for each pattern). A finite automaton has no memory - no stack, no heap, no infinite tape to scribble on. All it has is a finite number of internal states, each of which can read...
What's the difference between disabled=“disabled” and readonly=“readonly” for HTML form input fields
...ments can't.
Read more about this in this great article or the definition by w3c. To quote the important part:
Key Differences
The Disabled attribute
Values for disabled form elements are not passed to the processor method. The W3C calls this a successful element.(This works simila...
C# equivalent to Java's charAt()?
... use the charAt() method in Java get an individual character in a string by specifying its position. Is there an equivalent method in C#?
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how to get first three characters of an NSString?
...dCharacterSequenceAtIndex:2])];
substringToIndex of NSString is indexing by code unit, emoji takes two code units.
make sure check the index yourself.
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Switching between GCC and Clang/LLVM using CMake
...er identification is Clang
The compiler specific flags can be overridden by putting them into a system wide CMake file and pointing the CMAKE_USER_MAKE_RULES_OVERRIDE variable to it. Create a file ~/ClangOverrides.txt with the following contents:
SET (CMAKE_C_FLAGS_INIT "-Wall -std...
How do I reflect over the members of dynamic object?
...ynamicMetaObjectProvider implementations), you can use the answer provided by itowlson. ExpandoObject stores its properties in a dictionary and you can simply cast your dynamic object to a dictionary.
If it's DynamicObject (another IDynamicMetaObjectProvider implementation), then you need to use w...
How to efficiently count the number of keys/properties of an object in JavaScript?
...is method would be removed or overridden you might get unexpected results. By calling it from Object.prototype it makes it little more robust. The reason for using call is because you want to invoke the method on obj instead of on the prototype.
– Renaat De Muynck
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How to use UTF-8 in resource properties with ResourceBundle
...ertyResourceBundle when a .properties file is specified. This in turn uses by default Properties#load(InputStream) to load those properties files. As per the javadoc, they are by default read as ISO-8859-1.
public void load(InputStream inStream) throws IOException
Reads a property list (ke...
bash: mkvirtualenv: command not found
...d virtualenvwrapper.sh and outputs the path to it. The script is then read by the shell via 'source'.
If you want this to happen every time you restart your shell, it's probably better to grab the output from the "which" command first, and then put the "source" line in your shell, something like th...
Get Mouse Position
... simulate a natural mouse movement in Java (going from here to there pixel by pixel). To do that I need to know the starting coordinates.
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