大约有 4,570 项符合查询结果（耗时：0.0251秒） [XML]
PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
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A PostgreSQL "schema" is roughly the same as a MySQL "database". Having many databases on a PostgreSQL installation can get problematic; having many schemas will work with no trouble. So you definitely want to go with one databa...
How to set current working directory to the directory of the script in bash?
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Also returns '.' in Mac OSX
– Ben Clayton
Jul 11 '13 at 18:16
4
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Is it safe to remove selected keys from map within a range loop?
...stom type that implements the func (a T) expired() bool interface. For purposes of this example, you could try: m := make(map[int]int) /* populate m here somehow */ for key := range (m) { if key % 2 == 0 { /* this is just some condition, such as calling expired */ delete(m, key); } }
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How to output a multiline string in Bash?
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Here documents are often used for this purpose.
cat << EOF
usage: up [--level <n>| -n <levels>][--help][--version]
Report bugs to:
up home page:
EOF
They are supported in all Bourne-derived shells including all versions of Bash.
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Remove the last line from a file in Bash
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Of course, in that case you could also use head -n -1 instead of sed.
MacOS:
On Mac OS X (as of 10.7.4), the equivalent of the sed -i command above is
sed -i '' -e '$ d' foo.txt
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Is PowerShell ready to replace my Cygwin shell on Windows? [closed]
...y help or they don't.
You need help or you don't.
If you know Unix and those tools do what you need them to do on Windows - then you are a happy guy and there is no need to learn PowerShell (unless you want to explore).
My original intent was to include a set of Unix tools in Windows and be done ...
How to update Ruby to 1.9.x on Mac?
...y Version Manager) is the Standard for upgrading your Ruby installation on OSX: https://rvm.io
To get started, open a Terminal Window and issue the following command:
\curl -L https://get.rvm.io | bash -s stable --ruby
( you will need to trust the RVM Dev Team that the command is not malicious ...
How to increase heap size of an android application?
... work on Gingerbread and above.
The only way to have as large a limit as possible is to do memory intensive tasks via the NDK, as the NDK does not impose memory limits like the SDK.
Alternatively, you could only load the part of the model that is currently in view, and load the rest as you need it...
How to send email attachments?
...ase explain how to send an attachment in an email. I know there are other posts online but as a Python beginner I find them hard to understand.
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How do I handle the window close event in Tkinter?
How do I handle the window close event (user clicking the 'X' button) in a Python Tkinter program?
6 Answers
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