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What is a race condition?
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A race condition occurs when two or more threads can access shared data and they try to change it at the same time. Because the thread scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to ac...
Programmatically find the number of cores on a machine
Is there a way to determine how many cores a machine has from C/C++ in a platform-independent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)?
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C++ Object Instantiation
I'm a C programmer trying to understand C++. Many tutorials demonstrate object instantiation using a snippet such as:
9 An...
Proper URL forming with Query String and Anchor Hashtag
When both a query string and anchor tag (hash tag) are visible in a URL, what is the proper order for them to appear?
4 Ans...
Getting current unixtimestamp using Moment.js
...et the unix timestamp by using the following JavaScript function: Math.floor(new Date().getTime()/1000) .
4 Answers
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How to find all occurrences of a substring?
...There is no simple built-in string function that does what you're looking for, but you could use the more powerful regular expressions:
import re
[m.start() for m in re.finditer('test', 'test test test test')]
#[0, 5, 10, 15]
If you want to find overlapping matches, lookahead will do that:
[m.st...
console.writeline and System.out.println
...ou can handle this in your application)
System.console() provides methods for reading password without echoing characters
System.out and System.err use the default platform encoding, while the Console class output methods use the console encoding
This latter behaviour may not be immediately obviou...
How to “comment-out” (add comment) in a batch/cmd?
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The rem command is indeed for comments. It doesn't inherently update anyone after running the script. Some script authors might use it that way instead of echo, though, because by default the batch interpreter will print out each command before it's pr...
add a string prefix to each value in a string column using Pandas
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thank you. if of interest, dataframe indexes also support such string manipulations.
– tagoma
Jul 10 '17 at 21:30
2
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Diff two tabs in Vim
...rent view vertically so you can open the second file there. The :diffthis (or short: :difft) command is then applied to each view.
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