大约有 40,000 项符合查询结果（耗时：0.0376秒） [XML]
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...5 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a good reason (whether or not it applies today)?
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How do you create a remote Git branch?
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First, you create your branch locally:
git checkout -b <branch-name> # Create a new branch and check it out
The remote branch is automatically created when you push it to the remote server. So when you feel ready for it, you can just do:
git push <remote-name&g...
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
...n as root any more on my mysql install. I was attempting to run mysql without passwords turned on... but whenever I ran the command
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How to permanently set $PATH on Linux/Unix? [closed]
...nk the best answer is suggested /etc/environment. But can I refresh it without logging out and in? Sometimes I don't use bash or sh so source /etc/environment doesn't work.
– banan3'14
Apr 8 '18 at 20:22
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Rails mapping array of hashes onto single hash
... case they are equivalent. The unary ampersand as used here builds a block out of the symbol. However, reduce has a special case that accepts a symbol. I wanted to avoid the unary ampersand operator to simplify the example, but redgetan is correct that the initial value is optional in this case.
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Why do indexes in XPath start with 1 and not 0?
...nd I were comparing past languages we had programmed in and were talking about our experience with VBScript with its odd features such as 1-based index instead of 0-based indexes like almost every other language has, the reasoning being that it was a language for users (e.g. Excel VBA) inste...
Orchestration vs. Choreography
... right. However, these technologies do not give a rich behavioral detail about the role of the service in more complex collaboration. This collaboration includes a sequence of activities and relationships between activities, which build the business process. There are two ways to build this process:...
Is it Linq or Lambda?
... both of which can be used by themselves.
Update: As svick rightly points out, LINQ with query syntax is also implemented using lambda expressions (as mentioned earlier, the compiler allows you to write in query syntax but effectively transforms it to method syntax behind your back). This is just p...
Will Emacs make me a better programmer? [closed]
...he features one needs. Sure you may want to configure the shortcuts and layout, but you shouldn't need to write a bunch of scripts to handle everything.
– Kibbee
Jan 29 '09 at 16:49
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Difference between CR LF, LF and CR line break types?
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It's really just about which bytes are stored in a file. CR is a bytecode for carriage return (from the days of typewriters) and LF similarly, for line feed. It just refers to the bytes that are placed as end-of-line markers.
Way more informat...