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What does the “-U” option stand for in pip install -U

Despite a ton of Googling, I can't find any docs for pip's command line options/arguments. What does pip install -U mean? Does anyone have a link to a list of pip's options and arguments? ...
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How do I use vim registers?

... Registers in Vim let you run actions or commands on text stored within them. To access a register, you type "a before a command, where a is the name of a register. If you want to copy the current line into register k, you can type "kyy Or you can append to a regis...
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Objective-C Split()?

...entsSeparatedByString:@":"]; where yourString contains @"one:two:three" and arrayOfComponents will contain @[@"one", @"two", @"three"] and you can access each with NSString *comp1 = arrayOfComponents[0]; (https://developer.apple.com/documentation/foundation/nsstring/1413214-componentsseparated...
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Running a cron every 30 seconds

...e offset by 30 seconds: # Need these to run on 30-sec boundaries, keep commands in sync. * * * * * /path/to/executable param1 param2 * * * * * ( sleep 30 ; /path/to/executable param1 param2 ) You'll see I've added comments and formatted to ensure it's easy to keep them synchronised. Bo...
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Using ping in c#

...s; } catch (PingException) { // Discard PingExceptions and return false; } finally { if (pinger != null) { pinger.Dispose(); } } return pingable; } ...
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Hide files with certain extension in Sublime Text Editor?

...e you talking about the sidebar? For example, if you select File → Open and select a folder, then the folder and its contents are displayed along the left side, allowing you to navigate amongst its contents and sub-directories. If that is the case, then the answer is yes, files can be excluded. ...
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Git merge without auto commit

... FYI: If you want to merge the changes and then commit as if you had manually typed all of the changes you merged in (as opposed to a traditional merge) you need to run rm .git/MERGE_HEAD afterward, which will force git to forget that the merge happened. ...
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What is the HEAD in git?

There seems to be a difference between the last commit, the HEAD and the state of the file I can see in my directory. 5 Ans...
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How to format all Java files in an Eclipse project at one time?

I have an old Eclipse project and the code is not well formatted. I'd like to format all the .java files according to the settings in Eclipse. I don't want to edit every individual file with Ctrl + Shift + F . Is there a way to format all my files? Perhaps an Eclipse plugin? ...
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new Date() works differently in Chrome and Firefox

...x epoch, or use a regular expression to break the string down in its parts and then feed those into Date.UTC. share | improve this answer | follow | ...