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What are the options for storing hierarchical data in a relational database? [closed]
... be way to expensive to reach the Nirvana of the simplicity of maintenance by the Adjacency List and the awesome performance of Nested Sets. As a result, most people end up having to settle for one or the other especially if there are more than, say, a lousy 100,000 nodes or so. Using the push sta...
Java : How to determine the correct charset encoding of a stream
...ed character set. UniversalDetector ud = new UniversalDetector(null); byte[] bytes = FileUtils.readFileToByteArray(new File(file)); ud.handleData(bytes, 0, bytes.length); ud.dataEnd(); detectedCharset = ud.getDetectedCharset();
– Rohit Verma
Sep 1...
Passing parameters to a Bash function
...:
function_name "$arg1" "$arg2"
The function refers to passed arguments by their position (not by name), that is $1, $2, and so forth. $0 is the name of the script itself.
Example:
function_name () {
echo "Parameter #1 is $1"
}
Also, you need to call your function after it is declared.
#...
Exploitable PHP functions
... access a database, and read/write to files. This code can be influenced by an attacker, and that is a vulnerability.
– rook
Sep 19 '10 at 9:59
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Best way to define private methods for a class in Objective-C
...f this approach is that it allows you to group your method implementations by functionality, not by the (sometimes arbitrary) public/private distinction.
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What are bitwise operators?
...oth enabled), you could pass them as a single value. This is accomplished by assigning each possible flag it's own bit in a bitset (byte, short, int, or long). For example:
Read: 00000001
Write: 00000010
So if you want to pass read AND write, you would pass (READ | WRITE) which then combines t...
Is there a standardized method to swap two variables in Python?
...ments is created in the memory. The two element are the objects designated by the identifiers b and a, that were existing before the instruction is encoutered during an execution of program
just after the creation of this tuple, no assignement of this tuple object have still been made, but it doesn'...
git pull keeping local changes
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If you have a file in your repo that it is supposed to be customized by most pullers, then rename the file to something like config.php.template and add config.php to your .gitignore.
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“Register” an .exe so you can run it from any command line in Windows
...e is in a folder that's on the PATH environment variable.
You can do this by either installing it into a folder that's already on the PATH or by adding your folder to the PATH.
You can have your installer do this - but you will need to restart the machine to make sure it gets picked up.
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Extracting numbers from vectors of strings
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How about
# pattern is by finding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the ...