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How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...irectory not in @INC?
Programming Perl - chapter 31 part 13, ch 7.2.41
How does a Perl program know where to find the file containing Perl module it uses?
There does not seem to be a comprehensive @INC FAQ-type post on Stack Overflow, so this question is intended as one.
When to use each approach...
To find whether a column exists in data frame or not
...ou could use grepl("^d$",names(dat)), to ensure that a column with name dd does not return TRUE.
– BenBarnes
Apr 23 '12 at 8:09
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How to close tag properly?
... It is not only valid HTML5, but rather valid in HTML4 as well. HTML doesn't require self-closing "void" elements as you said. +1 for the coherent answer.
– Fabrício Matté
Feb 13 '13 at 20:24
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How to git reset --hard a subdirectory?
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Note (as commented by Dan Fabulich) that:
git checkout -- <path> doesn't do a hard reset: it replaces the working tree contents with the staged contents.
git checkout HEAD -- <path> does a hard reset for a path, replacing both the index and the working tree with the version from th...
What is the best way to programmatically detect porn images? [closed]
Akismet does an amazing job at detecting spam comments. But comments are not the only form of spam these days. What if I wanted something like akismet to automatically detect porn images on a social networking site which allows users to upload their pics, avatars, etc?
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CSS selector for first element with class
...between :first-child and :first-of-type. However, as with :first-child, it does not look at any other conditions or attributes. In HTML, the element type is represented by the tag name. In the question, that type is p.
Unfortunately, there is no similar :first-of-class pseudo-class for matching the...
rbenv not changing ruby version
...ated my .bash_profile and reset PATH.
Finally, make sure your $HOME folder doesn't have a .ruby-version file that you may have created by accident if you were to have done $ rbenv local <ruby-version> in your $HOME folder. Doing $ rbenv global <ruby-version> modifies the $HOME/.rbenv/ver...
Check if an image is loaded (no errors) with jQuery
...mage thumbnails contained in a unordered list. When the image is loaded it does one thing, when an error occurs it does something else. I'm using jQuery load() and error() methods as events. After these events I check the image DOM element for the .complete to make sure the image wasn't already...
Which is faster : if (bool) or if(int)?
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Does this also apply to 64-bit processes, that __int64 is faster than int? Or CPU deals 32-bit integer with 32-bit instruction sets separately?
– Crend King
Apr 27 '11 at 21:22
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What is the difference between call and apply?
...rameters. Recommendation Use a normal function call funcname(arg1) if that does what you need, and save call and apply for those special occasions when you really need them.
– some
Jul 16 '14 at 5:04
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