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How to inspect the return value of a function in GDB?
..., fun () at test.c:2
2 return 42;
(gdb) finish
Run till exit from #0 fun () at test.c:2
main () at test.c:7
7 return 0;
Value returned is $1 = 42
(gdb)
The finish command can be abbreviated as fin. Do NOT use the f, which is abbreviation of frame command!
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What is the difference between join and merge in Pandas?
...ve some typing by using df1.join(df2) instead.
Some notes on these issues from the documentation at http://pandas.pydata.org/pandas-docs/stable/merging.html#database-style-dataframe-joining-merging:
merge is a function in the pandas namespace, and it is also
available as a DataFrame instance ...
How do I byte-compile everything in my .emacs.d directory?
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You can use the --batch flag to recompile from the command line.
To recompile all, do
emacs --batch --eval '(byte-recompile-directory "~/.emacs.d")'
or to recompile a single file as from a Makefile,
emacs --batch --eval '(byte-compile-file "your-elisp-file.el")'...
When to use a Content Provider
...come with implementing your own Content Provider, so you shouldn't drop it from consideration just because your app doesn't share its data.
– Alex Lockwood
Jun 27 '12 at 18:34
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How to git reset --hard a subdirectory?
...for a path, replacing both the index and the working tree with the version from the HEAD commit.
As answered by Ajedi32, both checkout forms don't remove files which were deleted in the target revision.
If you have extra files in the working tree which don't exist in HEAD, a git checkout HEAD -- &...
How do I write output in same place on the console?
...am new to python and am writing some scripts to automate downloading files from FTP servers, etc. I want to show the progress of the download, but I want it to stay in the same position, such as:
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How does an underscore in front of a variable in a cocoa objective-c class work?
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From what I understand, Apple recommends against using the underscore prefix on method names (they reserve that for themselves as a convention for private methods), but they don't have any such recommendation about instance v...
When would you use the Builder Pattern? [closed]
...d method could be modified to check parameters after they have been copied from the builder to the Pizza object and throw an IllegalStateException if an invalid parameter value has been supplied. This pattern is flexible and it is easy to add more parameters to it in the future. It is really only us...
Regexp Java for password validation
...e back end that will actually use the password.
I'll start with the regex from the accepted answer:
^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=\S+$).{8,}$
First of all, since Java supports \A and \z I prefer to use those to make sure the entire string is validated, independently of...
Practical example where Tuple can be used in .Net 4.0?
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Probably worth pointing out from MSDN: "Any public static members of this type are thread safe. Any instance members are not guaranteed to be thread safe."
– Matt Borja
Nov 17 '15 at 20:43
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