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What is a 'thunk'?
...n it used in programming (specifically in the C++ domain) and have no idea what it is. Presumably it is a design pattern, but I could be wrong. Can anyone give a good example of a thunk?
...
Check if element exists in jQuery [duplicate]
...ntuitive. The length property tells you how many elements match the query. What is not intuitive or straight-forward about that?
– Alice Wonder
Nov 7 '16 at 21:01
1
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How can I replace a newline (\n) using sed?
...
sed is intended to be used on line-based input. Although it can do what you need.
A better option here is to use the tr command as follows:
tr '\n' ' ' < input_filename
or remove the newline characters entirely:
tr -d '\n' < input.txt > output.txt
or if you have the GNU ver...
How to make good reproducible pandas examples
...ly to above)
In [3]: iwantthis
Out[3]:
A B
0 1 5
1 4 6
Explain what the numbers come from: the 5 is sum of the B column for the rows where A is 1.
do show the code you've tried:
In [4]: df.groupby('A').sum()
Out[4]:
B
A
1 5
4 6
But say what's incorrect: the A column is in the...
Error to run Android Studio
...4)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Check what compiler is used
javac -version
It should show something like this
javac 1.8.0_91
Finally, add JAVA_HOME to the environment variable
Edit /etc/environment and add JAVA_HOME=/usr/lib/jvm/java-8-oracle to the end of...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
...implementations if we are talking about only a dozen threads (this is also what Raymond Chen suggests on the MSDN blog post Does Windows have a limit of 2000 threads per process?).
On Windows using unbuffered file I/O means that writes must be of a size which is a multiple of the page size. I have ...
Skip List vs. Binary Search Tree
...hey scale incredibly well with the number of concurrent accesses. This is what makes skip lists special, other lock based data structures tend to croak under pressure.
Lock-free skip lists are consistently faster than locking skip lists but only barely.
transactional skip lists are consistently 2-3...
How do I check out a remote Git branch?
...else's branch, you need to create your own "copy" of that branch, which is what the above command does (well, it creates your branch and checks it out, too).
– Dan Moulding
Nov 23 '09 at 15:24
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How to temporarily exit Vim and go back
...
What if I want to continue running my server while editing my file. For example, let's say I do nodemon app.js (nodemon refreshes the server on file edits for you) and then I want to return to my vim editing. Can I do that wi...
How to create strings containing double quotes in Excel formulas?
...ld be:
="Maurice "&Quote("Rocket")&" Richard"
This is similar to what Dave DuPlantis posted.
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