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Struct Constructor in C++?
...fference between a class and a struct is that members and base classes are private by default in classes, whereas they are public by default in structs.
So structs can have constructors, and the syntax is the same as for classes.
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How do I implement basic “Long Polling”?
I can find lots of information on how Long Polling works (For example, this , and this ), but no simple examples of how to implement this in code.
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Using CMake, how do I get verbose output from CTest?
I'm using CMake to build my project. I have added a unit test binary which is using the Boost unit testing framework. This one binary contains all of the unit tests. I've added that binary to be run by CTest:
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What is a Context Free Grammar?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
bash: Bad Substitution
This bash script gives me Bad substitution error on Ubuntu. Any help will be highly appreciated.
11 Answers
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git: Your branch is ahead by X commits
...irs
Step 3 : git reset --hard origin/<branch_name>
More details : https://stackoverflow.com/a/39698570/2439715
Enjoy.
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Convert xlsx to csv in Linux with command line
...ndencies that you also need to install.
I found this Python alternative:
https://github.com/dilshod/xlsx2csv
$ easy_install xlsx2csv
$ xlsx2csv file.xlsx > newfile.csv
Took 2 seconds to install and works like a charm.
If you have multiple sheets you can export all at once, or one at a time...
How to sort the letters in a string alphabetically in Python
Is there an easy way to sort the letters in a string alphabetically in Python?
7 Answers
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How to merge every two lines into one from the command line?
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awk:
awk 'NR%2{printf "%s ",$0;next;}1' yourFile
note, there is an empty line at the end of output.
sed:
sed 'N;s/\n/ /' yourFile
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Error in plot.new() : figure margins too large, Scatter plot
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Every time you are creating plots you might get this error - "Error in plot.new() : figure margins too large". To avoid such errors you can first check par("mar") output. You should be getting:
[1] 5.1 4.1 4.1 2.1
To change that write:
par(mar=c(1...