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what is the difference between ?:, ?! and ?= in regex?
...look behind
?<! is for negative look behind
Please check here: http://www.regular-expressions.info/lookaround.html for very good tutorial and examples on lookahead in regular expressions.
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How can I tell PyCharm what type a parameter is expected to be?
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replicant.knock_over() # Shows a warning.
See: https://www.jetbrains.com/help/pycharm/2016.1/type-hinting-in-pycharm.html#legacy
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Remove non-ascii character in string
...200F &#8207; right-to-left-mark
Some references on those:
http://www.fileformat.info/info/unicode/char/200B/index.htm
https://en.wikipedia.org/wiki/Left-to-right_mark
Note that although the encoding of the embedded character is UTF-8, the encoding in the regular expression is not. Alth...
What is a tracking branch?
...ches. This often referenced link web.archive.org/web/20130419172453/http://www.gitguys.com/… distinguishes between "tracking branches" & "remote tracking branches". They call origin/master a "remote tracking branch" - I agree - but then they call "master" a "tracking branch" too. What is maste...
How do you make lettered lists using markdown?
...imal;}
ol ol ol ol ol ol { list-style-type: upper-roman;}
/* https://www.w3schools.com/cssref/pr_list-style-type.asp */
/* https://stackoverflow.com/questions/11445453/css-set-li-indent */
/* https://stackoverflow.com/questions/13366820/how-do-you-make-lettered-lists-using-markdown */
&l...
What does Class mean in Java?
...flection (the feature of Java language used to introspect itself): https://www.oracle.com/technetwork/articles/java/javareflection-1536171.html
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What are Makefile.am and Makefile.in?
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Simple example
Shamelessly adapted from: http://www.gnu.org/software/automake/manual/html_node/Creating-amhello.html and tested on Ubuntu 14.04 Automake 1.14.1.
Makefile.am
SUBDIRS = src
dist_doc_DATA = README.md
README.md
Some doc.
configure.ac
AC_INIT([automake_...
Why define an anonymous function and pass it jQuery as the argument?
...m/resources/essentialjsdesignpatterns/book/#modulepatternjavascript
http://www.adequatelygood.com/2010/3/JavaScript-Module-Pattern-In-Depth
The purpose of this code is to provide "modularity", privacy and encapsulation for your code.
The implementation of this is a function that is immediately i...
How to remove last n characters from every element in the R vector
...ter notation.
See here for more information on regex quantifiers:
https://www.regular-expressions.info/refrepeat.html
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Why is Scala's immutable Set not covariant in its type?
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at http://www.scala-lang.org/node/9764 Martin Odersky writes:
"On the issue of sets, I believe the non-variance stems also from the implementations. Common sets are implemented as hashtables, which are non-variant arrays of the key...