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Getting unique items from a list [duplicate]
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A HashSet won't maintain any ordering, which may or may not be an issue for the OP.
– LukeH
Sep 7 '09 at 9:13
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How to sort the result from string_agg()
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With postgres 9.0+ you can write:
select string_agg(product,' | ' order by product) from "tblproducts"
Details here.
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How can I reverse the order of lines in a file?
I'd like to reverse the order of lines in a text file (or stdin), preserving the contents of each line.
25 Answers
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Visual Studio: Relative Assembly References Paths
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As mentioned before, you can manually edit your project's .csproj file in order to apply it manually.
I also noticed that Visual Studio 2013 attempts to apply a relative path to the reference hintpath, probably because of an attempt to make the project file more portable.
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What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Apache2: 'AH01630: client denied by server configuration'
...other
characteristics of client requests was done using the directives
Order, Allow, Deny, and Satisfy.
In 2.4, such access control is done in the same way as other
authorization checks, using the new module mod_authz_host.
The new directive is Require:
2.2 configuration:
Order allow,...
git replacing LF with CRLF
...Files(x86)%\git\etc\gitconfig). Also there're (cascading in the following order):
– "global" (per-user) gitconfig located at ~/.gitconfig, yet another
– "global" (per-user) gitconfig at $XDG_CONFIG_HOME/git/config or $HOME/.config/git/config and
– "local" (per-repo) gitconfi...
What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...eed to wrap up a map with some other characteristics, perhaps some sort of ordered map, like a TreeMap.
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How to search and replace globally, starting from the cursor position and wrapping around the end of
...pattern or flags
are altered in the first one.
2. To save some typing, in order to bring up the skeleton of
the above substitution command in the command line, one can define
a Normal-mode mapping, like so:
:noremap <leader>cs :,$s///gc\|1,''-&&<c-b><right><right><...
What's the point of g++ -Wreorder?
The g++ -Wall option includes -Wreorder. What this option does is described below. It is not obvious to me why somebody would care (especially enough to turn this on by default in -Wall).
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