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Undo git pull, how to bring repos to old state
Is there any way to revert or undo git pull so that my source/repos will come to old state that was before doing git pull ?
I want to do this because it merged some files which I didn't want to do so, but only merge other remaining files. So, I want to get those files back, is that possible?
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What's the difference between VARCHAR and CHAR?
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VARCHAR is variable-length.
CHAR is fixed length.
If your content is a fixed size, you'll get better performance with CHAR.
See the MySQL page on CHAR and VARCHAR Types for a detailed explanation (be sure to also read the comments...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
... to get lines in one string, and found that ''.split() returns an empty list, [] , while ''.split('\n') returns [''] . Is there any specific reason for such a difference?
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Why should the “PIMPL” idiom be used? [duplicate]
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edited Sep 12 '13 at 9:49
Oleksiy
28.1k1919 gold b...
Kill child process when parent process is killed
... using System.Diagnostics.Process class from my application. I want this processes to be killed when/if my application has crashed. But if I kill my application from Task Manager, child processes are not killed. Is there any way to make child processes dependent on parent process?
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In C#, what happens when you call an extension method on a null object?
...al calls (i.e. it uses the "call" il instruction, not "callvirt") so there is no null check unless you write it yourself in the extension method. This is actually useful in a few cases:
public static bool IsNullOrEmpty(this string value)
{
return string.IsNullOrEmpty(value);
}
public static voi...
Fastest way to tell if two files have the same contents in Unix/Linux?
...ich I need to check whether two files contain the same data or not. I do this a for a lot of files, and in my script the diff command seems to be the performance bottleneck.
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How can I see normal print output created during pytest run?
...ome print statements in my code, and see what gets printed out when I exercise it. My usual way to "exercise" it is with existing pytest tests. But when I run these, I don't seem able to see any standard output (at least from within PyCharm, my IDE).
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When should a class be Comparable and/or Comparator?
...n classes which implement both Comparable and Comparator . What does this mean? Why would I use one over the other?
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LINQ equivalent of foreach for IEnumerable
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There is no ForEach extension for IEnumerable; only for List<T>. So you could do
items.ToList().ForEach(i => i.DoStuff());
Alternatively, write your own ForEach extension method:
public static void ForEach<T>(thi...