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Exercises on the D track

Join the D Track
18 exercises to help you master D
easy

Hello World

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

Leap

Given a year, report if it is a leap year.
language basics
easy

Gigasecond

Given a moment, determine the moment that would be after a gigasecond has passed.
language basics
time
easy

RNA Transcription

Given a DNA strand, return its RNA Complement Transcription.
control flow foreach
error handling
string manipulation
easy

Raindrops

Convert a number to a string, the contents of which depend on the number's factors.
control flow if statements
language basics
easy

Bob

Bob is a lackadaisical teenager. In conversation, his responses are very limited.
control flow if statements
string manipulation
easy

ETL

We are going to do the `Transform` step of an Extract-Transform-Load.
associative arrays
control flow foreach
string manipulation
easy

Hamming

Calculate the Hamming difference between two DNA strands.
control flow foreach
error handling
easy

Nucleotide Count

Given a DNA string, compute how many times each nucleotide occurs in the string.
associative arrays
classes
parsing
easy

Robot Name

Manage robot factory settings.
classes
random numbers
easy

Difference Of Squares

Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
algorithms
control flow foreach
functional
template metaprogramming
math
easy

Roman Numerals

Write a function to convert from normal numbers to Roman Numerals.
conversions
functional
string manipulation
easy

Series

Given a string of digits, output all the contiguous substrings of length `n` in that string.
arrays
string manipulation
easy

Triangle

Determine if a triangle is equilateral, isosceles, or scalene.
control flow if statements
language basics
easy

Crypto Square

Implement the classic method for composing secret messages called a square code.
algorithms
classes
string manipulation
medium

Circular Buffer

A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
class templates
data structures
easy

Pangram

Determine if a sentence is a pangram.
control flow
language basics
string manipulation
hard

React

Implement a basic reactive system.
delegates
generics
higher order functions
nested classes
reactive programming