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Further understanding setRetainInstance(true)
...stance(true) on a Fragment ? The documentation is virtually non-existent and this seems like a very important function. Specifically I want to know how much of this sequence (that I made up) is true:
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Replace whole line containing a string using Sed
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You can use the change command to replace the entire line, and the -i flag to make the changes in-place. For example, using GNU sed:
sed -i '/TEXT_TO_BE_REPLACED/c\This line is removed by the admin.' /tmp/foo
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Use 'class' or 'typename' for template parameters? [duplicate]
...ommittee introduced a new keyword typename to resolve syntactic ambiguity, and decided to let it also be used to specify template types to reduce confusion, but for backward compatibility, class kept its overloaded meaning.
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DateTime format to SQL format using C#
I am trying to save the current date time format from C# and convert it to an SQL Server date format like so yyyy-MM-dd HH:mm:ss so I can use it for my UPDATE query.
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How do I convert a datetime to date?
... To get in UTC which can be very helpful --> datetime.datetime.utcnow() and correspondingly datetime.datetime.utcnow().date()
– Nick Brady
Mar 7 '16 at 22:51
2
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Iterate over the lines of a string
... the main script confirms the three functions are equivalent. With timeit (and a * 100 for foo to get substantial strings for more precise measurement):
$ python -mtimeit -s'import asp' 'list(asp.f3())'
1000 loops, best of 3: 370 usec per loop
$ python -mtimeit -s'import asp' 'list(asp.f2())'
1000 ...
jQuery select2 get value of select tag?
... $("#first").val(); will return 1,2,3 (which ever is selected) and can you post the code in function select2() for more details.
– somesh
Nov 11 '13 at 14:40
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How to replace case-insensitive literal substrings in Java
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Not as elegant perhaps as other approaches but it's pretty solid and easy to follow, esp. for people newer to Java. One thing that gets me about the String class is this: It's been around for a very long time and while it supports a global replace with regexp and a global replace with Str...
PHP session lost after redirect
...nt script using exit(); (Others have also suggested session_write_close(); and session_regenerate_id(true), you can try those as well, but I'd use exit();)
Make sure cookies are enabled in the browser you are using to test it on.
Ensure register_globals is off, you can check this on the php.ini file...
Why do Objective-C files use the .m extension?
Since I started learning Objective-C and Cocoa, I've been wondering why they have chosen the extension .m for the implementation files - was it supposed to mean something, or was it just a random letter?
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