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Find unique elements based on given key
Input
Take a list of values xi each paired with a key yi. There may be duplicate values and keys, and they will all be integers.
[(x1, y1), (x2, y2), ...]
Output
Return a list of values from {xi} such that for each unique key k in {yi} there exists ex...
ASCII art uncompression from a base-n number
This is inspired by an 05AB1E answer.
Given two arguments, an integer and a string/list of characters:
Translate the number to base-n, where n is the length of the string.
For each character, replace every appearance of the index of that character ...
I am not concerned about the language, I want logic. Preferred language is java.
Q : I have Boolean variable called "contains"
contains = false; // true means you are inside the perimeter else outside
the value of Boolean variable contains keeps on changing randomly. In interval of few second...
Ternary-if Converter
code-golfstring
In Java/.NET/C/JavaScript/etc. you can use ternary-ifs to shorten if-statements.
For example (in Java):
// there is some String `s` and some integer `i`
if(i<0)s="Neg";else if(i>0)s="Pos";else s="Neut";
Can be shortened with a ternary-if to:
s=i<0?"Neg":i>
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I want to send a python package to a friend, but I don't want him to see the code, he should be able to just execute it. What should I do?
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You may have seen Jacob's Ladder in children's science museums. If you're not familiar with what they look like, there are several images and video examples on the Wikimedia Commons. The challenge today is to create an animated ASCII version of the electrical gadget. In the end, it should look so...
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Define f(a,b) := a if b=1; a^f(a,b-1) if b>1 (Tetration) for positive integers a and b, given four positive integers a,b,c,d, compare f(a,b) and f(c,d).
Your program should output three constant values to mean "greater", "less" and "equal".
Samples:
a b c d f(a,b) output f(c,d)
3 2 2 3 27 >...
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