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What are the differences between -std=c++11 and -std=gnu++11?
What are the differences between -std=c++11 and -std=gnu++11 as compilation parameter for gcc and clang? Same question with c99 and gnu99 ? I know about C++ and C standards, it's the differences in the parameters that interest me.
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Is it valid to have a tag inside another tag?
...generated by having multiple headings in one element of sectioning content and nested <section>'s are allowed.
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How to drop multiple columns in postgresql
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You can even leave out 'COLUMN' and use ALTER TABLE table DROP col1, DROP col2;
– Ondrej Burkert
Sep 11 '15 at 10:45
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emacs create new file with ido enabled
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For other commands/in general (e.g. C-x C-w), C-x C-f will go to the "normal" version of the command.
– Janus
May 19 '11 at 5:58
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How to break out of a loop in Bash?
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if [ "$done" -ne 0 ]; then
break
fi
done
: is the no-op command; its exit status is always 0, so the loop runs until done is given a non-zero value.
There are many ways you could set and test the value of done in order to exit the loop; the one I show above should work in any POSIX...
How to Replace dot (.) in a string in Java
...wo backslashes before the dot, one to escape the slash so it gets through, and the other to escape the dot so it becomes literal. Forward slashes and asterisk are treated literal.
str=xpath.replaceAll("\\.", "/*/"); //replaces a literal . with /*/
http://docs.oracle.com/javase/7/docs/ap...
mysql create user if not exists
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In 5.7.6 and above, you should be able to use CREATE USER
CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a version wh...
Add a method breakpoint to all methods of a class in EclipseIDE
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The fastest way is to go to the "Outline" view and select all of the methods you want, right-click and click "Toggle Method Breakpoint"
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Transmitting newline character “\n”
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%0A for newline \n <LF>` ; and %0D for carriage return \r <CR>
– sergiol
Oct 11 '17 at 16:55
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Compress files while reading data from STDIN
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Yes, use gzip for this. The best way is to read data as input and redirect the compressed to output file i.e.
cat test.csv | gzip > test.csv.gz
cat test.csv will send the data as stdout and using pipe-sign gzip will read that data as stdin. Make sure to redirect the gzip output to...