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How to tell if a string is not defined in a Bash shell script
...${VAR+xxx}" = "xxx" ]; then echo VAR is set but empty; fi
However, if you read the documentation for Autoconf, you'll find that they do not recommend combining terms with '-a' and do recommend using separate simple tests combined with &&. I've not encountered a system where there is a prob...
How to create an installer for a .net Windows Service using Visual Studio
... in Microsoft and came up with a inferior solution to a problem that had already been solved. See blog.iswix.com/2006/07/msi-vs-net.html for more information.
– Christopher Painter
Jan 27 '12 at 11:51
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What is recursion and when should I use it?
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There are a number of good explanations of recursion in this thread, this answer is about why you shouldn't use it in most languages.* In the majority of major imperative language implementations (i.e. every major implementation of C, C++, Basic, Python, Ruby,Java, and C#) iteration is ...
Twitter API returns error 215, Bad Authentication Data
...y)
// http_build_query automatically encodes, but our parameters
// are already encoded, and must be by this point, so we undo
// the encoding step
$querystring = urldecode(http_build_query($arr, '', '&'));
$url = "https://$host$path";
// mash everything together for the text to hash
$base_st...
static const vs #define
... #define. In fact, I've seen compilers where using #define caused massive (read-only) memory consumption, and static const used no un-needed memory.
– Gilad Naor
Jul 27 '10 at 8:10
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How can I get nth element from a list?
...ge. If you want to know more about the theory a good place to start is the readme file at the github repo.
Accessing lists and other datatypes
Getting access to the lens package
At the command line:
$ cabal install lens
$ ghci
GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help
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Best TCP port number range for internal applications [closed]
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Thanks. After reading your answer and giving it a bit of more thought I decided to go with the option of using a port within the second range. We picked 46xxx as IANA currently has very few ports assigned in this subrange link. We didn't p...
How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silver
... for C# and VB.NET applications)
I hope this gives you a clearer picture. Read the full article in A bad picture is worth a thousand long discussions..
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Difference between JSONObject and JSONArray
...I had too like you this confusion just one minute before finding this SO thread. After reading some of the answers, here is what I get: A JSONObject is a JSON-like object that can be represented as an element in the array, the JSONArray. In other words, a JSONArray can contain a (or many) JSONObject...
Access properties file programmatically with Spring?
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CREDIT: Programmatic access to properties in Spring without re-reading the properties file
I've found a nice implementation of accessing the properties programmatically in spring without reloading the same properties that spring has already loaded. [Also, It is not required to hardcode ...