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How to restore the permissions of files and directories within git if they have been modified?
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Git keeps track of filepermission and exposes permission changes when creating patches using git diff -p. So all we need is:
create a reverse patch
include only the permission changes
apply the patch to our working copy
As a one-liner:
git diff -p -R --n...
How can I pass a member function where a free function is expected?
...unction static in which case it doesn't require any object to be called on and you can use it with the type void (*)(int, int).
If you need to access any non-static member of your class and you need to stick with function pointers, e.g., because the function is part of a C interface, your best opt...
Android: Go back to previous activity
I want to do something simple on android app.
How is it possible to go back to a previous activity.
23 Answers
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Does Java support default parameter values?
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No, the structure you found is how Java handles it (that is, with overloading instead of default parameters).
For constructors, See Effective Java: Programming Language Guide's Item 1 tip (Consider static factory methods instead of constructors) if the overloading ...
How to check if std::map contains a key without doing insert?
The only way I have found to check for duplicates is by inserting and checking the std::pair.second for false , but the problem is that this still inserts something if the key is unused, whereas what I want is a map.contains(key); function.
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Sorting data based on second column of a file
I have a file of two columns and n number of rows.
4 Answers
4
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sql primary key and index
...x does no good, but the only harm (very small) is the additional file size and row-creation overhead.
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Compiling C++ on remote Linux machine - “clock skew detected” warning
I'm connected to my university's small Linux cluster via PuTTY and WinSCP, transferring files using the latter and compiling and running them with the former. My work so far has been performed in the university's labs, but today I have been doing some work at home that generated an interesting warn...
Date vs DateTime
...e isn't. DateTime represents some point in time that is composed of a date and a time. However, you can retrieve the date part via the Date property (which is another DateTime with the time set to 00:00:00).
And you can retrieve individual date properties via Day, Month and Year.
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Unlimited Bash History [closed]
...want my .bash_history file to be unlimited. e.g. So I can always go back and see how I built/configured something, or what that nifty command was, or how some command broke something weeks ago. How do I change this setting?
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