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Search and replace a line in a file in Python
... I would be wary of using it in real code because admittedly it's not very readable or familiar. In real (production) code it's worthwhile to spend just a few more lines of code to make the process explicit and thus make the code readable.
There are two options:
The file is not overly large, and ...
When to use volatile with multi threading?
If there are two threads accessing a global variable then many tutorials say make the variable volatile to prevent the compiler caching the variable in a register and it thus not getting updated correctly.
However two threads both accessing a shared variable is something which calls for protection v...
How to check if a file is empty in Bash?
...efaults set for ls that use the long format (like me) and the shell will already expand *.txt on its own. Just do for file in *.txt instead.
– Lilith
Jun 26 '18 at 17:19
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Learning Python from Ruby; Differences and Similarities
...you can define a function inside another function. The inner function has read access to variables from the outer function, but not write access. In Ruby, you define closures using blocks. The closures have full read and write access to variables from the outer scope.
Python has list comprehensio...
Can I mask an input text in a bat file?
... do set passwd=%%i
The Powershell script is equally simple:
$password = Read-Host "Enter password" -AsSecureString
$password = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($password)
$password = [Runtime.InteropServices.Marshal]::PtrToStringAuto($password)
echo $password
although with ...
ipython reads wrong python version
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This is an old thread, but I've also come accross virtualenvs and like them nice for developing products. For the purpose of "everyday" analysis however, I'd rather just have a straight up usable version of python/ipython in my system.
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What is the difference between properties and attributes in HTML?
...roperty is a reflected property for the id attribute: Getting the property reads the attribute value, and setting the property writes the attribute value. id is a pure reflected property, it doesn't modify or limit the value.
The type property is a reflected property for the type attribute: Getting ...
Best XML parser for Java [closed]
I need to read smallish (few MB at the most, UTF-8 encoded) XML files, rummage around looking at various elements and attributes, perhaps modify a few and write the XML back out again to disk (preferably with nice, indented formatting).
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How can I read and parse CSV files in C++?
.....)
then its only about three lines of code (OK 14 ->But its only 15 to read the whole file).
std::vector<std::string> getNextLineAndSplitIntoTokens(std::istream& str)
{
std::vector<std::string> result;
std::string line;
std::getline(str,line);
st...
A beginner's guide to SQL database design [closed]
...tware/database-design-tutorial/intro.html
It's pretty concise compared to reading an entire book and it explains the basics of database design (normalization, types of relationships) very well.
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