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Check existence of input argument in a Bash shell script

...e example above seems to use ${varname?message}. Is the extra : a typo, or does it change behavior? – Eki Mar 2 '17 at 16:52 6 ...
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UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to

...have to figure out yourself. Common ones are Latin-1 and UTF-8. Since 0x90 doesn't actually mean anything in Latin-1, UTF-8 (where 0x90 is a continuation byte) is more likely. You specify the encoding when you open the file: file = open(filename, encoding="utf8") ...
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Libraries do not get added to APK anymore after upgrade to ADT 22

... Is it just me, or does it sound wrong to have every Developer [that uses Eclipse and Libraries] go in to all of their library projects and mark "Android Private Libraries" as Exported? This makes me think that we have all mistaken the intentio...
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Why doesn't C# support the return of references?

I have read that .NET supports return of references, but C# doesn't. Is there a special reason? Why I can't do something like: ...
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How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]

...ur program exits: _CrtDumpMemoryLeaks(); Alternatively, if your program does not exit in the same place every time, you can call this at the start of your program: _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF ); Now when the program exits all the allocations that were not free...
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Check whether a string is not null and not empty

... Because StringUtils.isNotBlank(str) does the null-checking as well. – sdesciencelover Jan 30 '13 at 14:25 1 ...
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Angular IE Caching issue for $http

...swer should be marked as the answer, while the solution provided by Martin does work, it's more of a hack than an actual fix. – Robba May 23 '14 at 10:10 4 ...
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Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie

It looks like the launchd.conf does not load my environment variable anymore. Has anyone else noticed that? 9 Answers ...
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How do I get the path of a process in Unix / Linux

...and readlink -f /proc/<pid>/exe to get the value. On AIX, this file does not exist. You could compare cksum <actual path to binary> and cksum /proc/<pid>/object/a.out. share | im...
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Is it possible to implement a Python for range loop without an iterator variable?

... @blackkettle: it's faster because it doesn't need to return the current iteration index, which is a measurable part of the cost of xrange (and Python 3's range, which gives an iterator, not a list). @nemo, range is as optimized as it can be, but needing to build...