Perl 5 (-p), 15, 16 bytes
s/[b-z]\K.*?a//g
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or using options trick
Perl 5 (-nF/(?<![\x20a])(?!^)[b-z]*a/), 7 bytes
print@F
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Make the list Fibonacci-like
Challenge
A list of integer \$a\$1, \$a\$2, \$a\$3, ..., \$a\$n (\$ n ≥ 1 \$) is Fibonacci-like if \$a\$i \$=\$ \$a\$i - 1 \$+\$ \$a\$i - 2 for every \$i ≥ 2\$. Note that every list that contains only 1 or 2 integers are Fibonacci-like.
For example, \$[1]\$, \$[6, 9...
Roman Numerals... But With A Twist
I'm assuming you have some knowledge of roman numerals but let's just keep things clear by giving an example:
10 is X, 5 is V, 1 is I, 6 is VI, 4 is IV, 2 can be IIIV, 19 is XIX, 4 can also be expressed as IVX. Note the last three.
To make things even clearer th...
Roman Numerals... But With A Twist
I'm assuming you have some knowledge of roman numerals but let's just keep things clear by giving an example:
10 is X, 5 is V, 1 is I, 6 is VI, 4 is IV, 2 can be IIIV, 19 is XIX, 4 can also be expressed as IVX. Note the last three.
To make things even clearer th...
Count /[^a-z]/gi with /[a-z]/gi
Write a program or function which takes a single line of text as input and outputs the number of non-alphabetical characters in it (standard I/O rules apply). A non-alphabetical character is any character not appearing in this string:
abcdefghijklmnopqrstuvwxyzABCD...
Python 2, 88 bytes
p=lambda n:all(n%x for x in range(2,n))
s=lambda n:0if p((10223*2**n)+1)else s(n+1)
s(0)
This code will terminate if 10223 is a Sierpiński number. 10223 is currently the smallest candidate that may or may not be a Sierpiński number, as of December 2013.
A Sierpiński number is ...
Sort my Cups
I have a set of colored plastic cups. They come in four colors: green, yellow, pink, and blue. When I put them on my shelf, I like to stack them in a certain pattern. Your job is, given a list of any number of four distinct values (to represent the four cup colors), output a visual r...
Someone should just post "Replicate CodeGolf" as a challenge and we'll end up with the most efficiently coded online community in the history of the internet.
The Mongolian language has "vowel harmony". In short the vowel harmony means that certain vowels are not allowed to be placed next to each other in a word. This means that suffixes of words have to care about the vowels present in the words they attach to and need to resolve to a vowel that mat...
