Generalized Cantor set segment lengths
Problem
Let's define a generalized Cantor set by iteratively deleting some rational length segments from the middle of an unbroken interval.
Given the relative lengths of segments to delete or not, and the number of iterations to do, the problem is to wri...
Is this regular expression valid for strings that don't contain a double letter?
b(ab)*a + a(ba)*b .
In my opinion it doesn't generate all the strings such as : a , b ,bab,aba. If it is not correct,can someone give me a valid solution please?
Pangrams
The quick brown fox jumped over the lazy dog.
This is an example of a pangram - a sentence that contains every letter of the alphabet at least once.
A self-enumerating pangram is a sentence that fulfils the criteria to be a pangram by producing an analysis of its own letter count....
Construct any Sporadic Simple Group
There are 26 sporadic simple groups. Your task is to write a program which defines an operation isomorphic any of these groups.
Input: Two symbols that represent elements of the group. You can choose how these symbols will be represented (characters, numbers ...
This challenge is related to some of the MATL language's features, as part of the May 2018 Language of the Month event. Associated challenge: Function clipboard: copy.
Introduction
MATL's function clipboard stores ("copies") the inputs to the four most recent calls to normal, input-taking fun...
Challenge :
Given a string representing a mathematical expression return the result
Input :
A string representing a mathematical expression : '1 + 2 - 3 * (2/3 * 1)'.
Output :
The result after performing all operations.
Operators :
Possible operators
+ ---> plus
- ---> minus
...
Background
Boggle is a board game where the players have to find English words on a 4-by-4 board of random alphabets. Words can be constructed by selecting sequentially adjacent cells on the board. ("adjacent" means horizontally, vertically or diagonally adjacent.) Also, same cell can't be used ...
