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Check if an apt-get package is installed and then install it if it's not on Linux
... is available
The documentations are also very unclear, e.g.:
sudo apt dselect-upgrade
did not remove certbot when it was marked as deinstall, even though man apt-get seems to indicate that:
dselect-upgrade is used in conjunction with the traditional Debian packaging front-end, dselect(1). ...
How to fix corrupted git repository?
...reset --keep
You can also do the same manually by opening the Git GUI and selecting each "Staged changes" and click on "Unstage the change". When everything is unstaged, you should now be able to compress your database, check your database and commit.
I also tried the following commands but they d...
Parse string to DateTime in C#
...w[] { "dd-MM-yyyy", "dd.MM.yyyy" };
(new[] { "15-01-2019", "15.01.2019" }).Select(s => s.ToDate(patterns)).Dump();
which will convert the dates in the array on the fly by using the patterns and dump them to the console.
Some background about TryParseExact
Finally, Here are some comments ab...
Threading in a PyQt application: Use Qt threads or Python threads?
...have you considered non-blocking I/O using Twisted or non-blocking sockets/select?
EDIT: more on threads
Python threads
Python's threads are system threads. However, Python uses a global interpreter lock (GIL) to ensure that the interpreter is only ever executing a certain size block of byte-code...
When should I use git pull --rebase?
...ttered with hundreds of merges all over the place, or do you want only the select few merges that represent real merges of intentional divergent development efforts?
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Reintegrate can only be used if revisions X through Y were previously merged from to reintegra
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In TortoiseSVN, you can right click the file, select "TortoiseSVN" --> "Properties" and Delete the svn:mergeinfo property.
– StarCub
May 24 '13 at 4:18
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iOS Tests/Specs TDD/BDD and Integration & Acceptance Testing
...discount code; it may differ if the specified item can't be shipped by the selected shipping method; etc. As these possible conditions intersect with one another you end up with a geometrically increasing number of possible contexts; in xUnit-style testing this often leads to a lot of methods with ...
How to write a CSS hack for IE 11? [duplicate]
...this work because of the following:
When a user agent cannot parse the selector (i.e., it is not valid CSS 2.1), it must ignore the selector and the following declaration block (if any) as well.
<!doctype html>
<html>
<head>
<title>IE10/11 Media Query Test<...
Explaining Apache ZooKeeper
... simple: The server team with 3 servers has the majority and is allowed to select the new leader.
Even if you just have 3 servers and one of them fails the other 2 still form the majority and can agree that one of them will become the new leader.
I realize once you think about it some time and un...
What is a lambda (function)?
...tual SQL to execute using expression trees.
The statement above becomes:
select ... from [tablename]
where [FieldName] > 15 --this line was 'read' from the lambda function
This is different from normal methods or anonymous delegates (which are just compiler magic really) because they ca...