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Regular expression that matches valid IPv6 addresses
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I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote one that works with POSIX regular expressions and PERL regular expressions.
It should match:
IPv6 addresses
zero compressed IPv6 addr...
How to pass arguments and redirect stdin from a file to program run in gdb?
...t args:
% gdb ./a.out
(gdb) set args arg1 arg2 <file
(gdb) run
I was unable to achieve the same behaviour with --args parameter, gdb fiercely escapes the redirections, i.e.
% gdb --args echo 1 2 "<file"
(gdb) show args
Argument list to give program being debugged when it is started is "1 2...
django admin - add custom form fields that are not part of the model
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If for some reason, you get an AttributeError: Unable to lookup "extra_field"..., try adding a label to the extra_field definition. It seems that django tries to "guess" the label for it, by looking at the Model and the ModelAdmin for such an attribute definition.
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Why should hash functions use a prime number modulus?
... can certainly see how a larger number of buckets would be better, but I'm unable to make a mathematical argument of this.
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How to get existing fragments when using FragmentPagerAdapter
...decide to change the tag structure which would break your code leaving you unable to find a reference to the existing Fragments.
Alternate solution without relying on internal tag
Here's a simple example of how to get a reference to the Fragments returned by FragmentPagerAdapter that doesn't rely ...
How to configure slf4j-simple
...lugin.
Maven uses a (hacked) version of the slf4j SimpleLogger, and I was unable to get my plugin code to reroute its logging to something like log4j, which I could control.
And I can't change the maven logging config.
So, to quiet down some noisy info messages, I found I could use reflection lik...
What is a “callback” in C and how are they implemented?
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I have no idea what this does, and it's unable to be compiled successfully. Can anyone explain it in detailed way or fill the rest of the code up in order for compile successfully?
– Andy Lin
Jun 9 at 10:14
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Should 'using' directives be inside or outside the namespace?
...space. Both of these types provide a matching constructor. The compiler is unable to make a decision, so it flags the compiler error.
Placing the using-alias directive outside of the namespace is a bad practice because it can lead to confusion in situations such as this, where it is not obvious whi...
How to change the style of the title attribute inside an anchor tag?
...bute, as there is some chance that the content will be accessible to users unable to benefit from CSS.
update again I'm not changing the code because the "title" attribute has basically come to mean the "tooltip" attribute, and it's probably not a good idea to hide important text inside a field onl...
Why call git branch --unset-upstream to fixup?
...t exist, which is suspicious at best—it means a different Git feature is unable to do anything for you—and Git is warning you about it. You have been getting along just fine without having the "upstream tracking" feature work as intended, so it's up to you whether to change anything.
For anoth...