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Import SQL dump into PostgreSQL database
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@Dazz:You could use -f switch (or --file) too
– Grzegorz Szpetkowski
Jul 27 '11 at 10:56
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Getting the count of unique values in a column in bash
I have tab delimited files with several columns. I want to count the frequency of occurrence of the different values in a column for all the files in a folder and sort them in decreasing order of count (highest count first). How would I accomplish this in a Linux command line environment?
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Postgresql: Scripting psql execution with password
...assword prompt. Instead of that, you can provide the password in a pgpass file or through the PGPASSWORD environment variable. See these:
https://www.postgresql.org/docs/9.0/static/libpq-pgpass.html
https://www.postgresql.org/docs/9.0/interactive/libpq-envars.html
There is no option to provide...
How to display gpg key details without importing it?
...g key and would like to view the details of the gpg key as it comes in the file. Is this possible without importing it into a key ring?
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`from … import` vs `import .` [duplicate]
...ts you use os.open without destroying the
# built in open() which returns file handles.
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node.js global variables?
...orkspace/zd/zgap/darwin-js',
LANG: 'en_US.UTF-8',
ITERM_PROFILE: 'Default',
SHLVL: '1',
COLORFGBG: '7;0',
HOME: '/Users/ddopson',
ITERM_SESSION_ID: 'w0t0p0',
LOGNAME: 'ddopson',
DISPLAY: '/tmp/launch-l9RQXI/org.x:0',
OLDPWD: '/w...
How do you share code between projects/solutions in Visual Studio?
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You can "link" a code file between two projects. Right click your project, choose Add -> Existing item, and then click the down arrow next to the Add button:
In my experience linking is simpler than creating a library. Linked code results ...
Practical usage of setjmp and longjmp in C
...eality. Your intermediate functions will allocate memory, grab locks, open files and do all kinds of different things that require cleanup. So in practice setjmp/longjmp are usually a bad idea except in very limited circumstances where you have total control over your environment (some embedded plat...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
...好的话，可能会遇到如下错误：
cannot open shared object file: No such file or directory
这是神马情况？可以用ldd命令来看看：
shell> ldd /path/to/nginx
libluajit-<VERSION>.so => not found
此类问题通常使用ldconfig命令就能解决：
shell> echo "/us...
Is embedding background image data into CSS as Base64 good or bad practice?
... you encode a large image or a significant number of images in to your css file it will take the browser longer to download the file leaving your site without any of the style information until the download completes. For small images that you don't intend on changing often if ever it is a fine sol...