Exercises on the Pharo Track | Exercism

Hello World

The classical introductory exercise. Just say "Hello, World!"

Two Fer

Create a sentence of the form "One for X, one for me."

text formatting

Leap

Given a year, report if it is a leap year.

Reverse String

Reverse a string

Isogram

Determine if a word or phrase is an isogram.

Grains

Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.

Allergies

Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.

bitwise operations

Matrix

Given a string representing a matrix of numbers, return the rows and columns of that matrix.

Grade School

Given students' names along with the grade that they are in, create a roster for the school

object oriented programming

Forth

Implement an evaluator for a very simple subset of Forth

Acronym

Convert a long phrase to its acronym

Anagram

Given a word and a list of possible anagrams, select the correct sublist.

Armstrong Numbers

Determine if a number is an Armstrong number

Atbash Cipher

Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.

Binary

Convert a binary number, represented as a string (e.g. '101010'), to its decimal equivalent using first principles

Bowling

Score a bowling game

object oriented programming

Clock

Implement a clock that handles times without dates.

structural equality

Collatz Conjecture

Calculate the number of steps to reach 1 using the Collatz conjecture

Darts

Write a function that returns the earned points in a single toss of a Darts game

Diamond

Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.

text formatting

Die

A small DSL for dice rolling

ETL

We are going to do the `Transform` step of an Extract-Transform-Load.

Flatten Array

Take a nested list and return a single list with all values except nil/null

Hamming

Calculate the Hamming difference between two DNA strands.

exception handling

High Scores

Manage a player's High Score list

ISBN Verifier

Check if a given string is a valid ISBN-10 number.

Luhn

Given a number determine whether or not it is valid per the Luhn formula.

Matching Brackets

Make sure the brackets and braces all match.

Minesweeper

Add the numbers to a minesweeper board

Pangram

Determine if a sentence is a pangram.

Proverb

For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.

Raindrops

Convert a number to a string, the contents of which depend on the number's factors.

Resistor Color Duo

Convert color codes, as used on resistors, to a numeric value.

Robot Simulator

Write a robot simulator.

object oriented programming

Roman Numerals

Write a function to convert from normal numbers to Roman Numerals.

Secret Handshake

Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.

bitwise operations

Sieve

Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.

Space Age

Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.

Sum Of Multiples

Given a number, find the sum of all the multiples of particular numbers up to but not including that number.

Tournament

Tally the results of a small football competition.

object oriented programming

Twelve Days

Output the lyrics to 'The Twelve Days of Christmas'

text formatting

Word Count

Given a phrase, count the occurrences of each word in that phrase.

pattern recognition