UNIX Shell

Tasks

• 100 doors
• 24 game
• A* search algorithm
• A+B
• ABC Problem
• Accumulator factory
• Ackermann function
• Active Directory/Search for a user
• Align columns
• Anagrams
• Anagrams/Deranged anagrams
• Anonymous recursion
• Append a record to the end of a text file
• Apply a callback to an array
• Arithmetic-geometric mean
• Arithmetic/Complex
• Arithmetic/Integer
• Array concatenation
• Array concatenation
• Array length
• Arrays
• Assertions
• Associative array/Creation
• Associative array/Iteration
• Averages/Arithmetic mean
• Averages/Mode
• Babbage problem
• Balanced brackets
• Binary digits
• Binary search
• Bitcoin/address validation
• Bitmap/Read a PPM file
• Bitmap/Write a PPM file
• Boolean values
• Box the compass
• Bulls and cows
• CSV data manipulation
• CSV to HTML translation
• Caesar cipher
• Calendar
• Call a function
• Case-sensitivity of identifiers
• Check input device is a terminal
• Check output device is a terminal
• Check that file exists
• Classes
• Collections
• Comma quibbling
• Command-line arguments
• Comments
• Compound data type
• Conditional structures
• Copy a string
• Count in octal
• Count occurrences of a substring
• Count the coins
• Create a file
• Create a file on magnetic tape
• Create an HTML table
• Date format
• Date manipulation
• Day of the week
• Define a primitive data type
• Delete a file
• Determine if a string is numeric
• Determine if only one instance is running
• Digital root
• Dinesman's multiple-dwelling problem
• Dutch national flag problem
• Dynamic variable names
• Empty directory
• Empty program
• Empty string
• Enforced immutability
• Environment variables
• Ethiopian multiplication
• Evaluate binomial coefficients
• Even or odd
• Execute a system command
• Extend your language
• Factorial
• Factors of an integer
• Fibonacci sequence
• Filter
• Find common directory path
• Find limit of recursion
• Five weekends
• FizzBuzz
• Fork
• Function composition
• Function definition
• Generate lower case ASCII alphabet
• Generic swap
• Globally replace text in several files
• Greatest element of a list
• Guess the number
• Guess the number/With feedback
• Guess the number/With feedback (player)
• HTTP
• HTTPS
• Hamming numbers
• Handle a signal
• Happy numbers
• Hash from two arrays
• Hello world!
• Hello world/Graphical
• Hello world/Line printer
• Hello world/Newline omission
• Hello world/Standard error
• Hello world/Text
• Hello world/Web server
• Here document
• Hostname
• I before E except after C
• IBAN
• Include a file
• Increment a numerical string
• Input loop
• Input/Output for Pairs of Numbers
• Integer comparison
• Integer sequence
• Interactive programming
• Introspection
• Inverted index
• Keyboard input/Obtain a Y or N response
• Knuth shuffle
• Last Friday of each month
• Leap year
• Least common multiple
• Linear congruential generator
• Linux CPU utilization
• Literals/Integer
• Literals/String
• Long multiplication
• Look-and-say sequence
• Loop over multiple arrays simultaneously
• Loops/Break
• Loops/Do-while
• Loops/Downward for
• Loops/For
• Loops/For with a specified step
• Loops/Foreach
• Loops/Infinite
• Loops/N plus one half
• Loops/Nested
• Loops/While
• Luhn test of credit card numbers
• MD5
• Make directory path
• Matrix multiplication
• McNuggets Problem
• Menu
• Middle three digits
• Modulinos
• Monty Hall problem
• Multisplit
• Mutual recursion
• N-queens problem
• Narcissist
• Narcissistic decimal number
• Native shebang
• Number reversal game
• Old lady swallowed a fly
• Optional parameters
• Palindrome detection
• Pangram checker
• Parsing/RPN calculator algorithm
• Parsing/Shunting-yard algorithm
• Pascal's triangle
• Penney's game
• Phrase reversals
• Play recorded sounds
• Population count
• Power set
• Pragmatic directives
• Primality by trial division
• Program name
• Program termination
• Queue/Definition
• Queue/Usage
• Quine
• Random number generator (device)
• Random number generator (included)
• Range expansion
• Range extraction
• Rate counter
• Read a configuration file
• Read a file line by line
• Read a specific line from a file
• Real constants and functions
• Regular expressions
• Remove lines from a file
• Rename a file
• Rep-string
• Repeat a string
• Respond to an unknown method call
• Return multiple values
• Reverse a string
• Reverse words in a string
• Rock-paper-scissors
• Roman numerals/Decode
• Roman numerals/Encode
• Rosetta Code/Run examples
• Rot-13
• Runtime evaluation
• Runtime evaluation/In an environment
• SHA-1
• Scope/Function names and labels
• Search a list
• Secure temporary file
• Self-describing numbers
• Shell one-liner
• Short-circuit evaluation
• Show the epoch
• Sierpinski carpet
• Sieve of Eratosthenes
• Simple database
• Sleep
• Sockets
• Sort an array of composite structures
• Sort an integer array
• Sorting algorithms/Sleep sort
• Soundex
• Special characters
• Speech synthesis
• Stable marriage problem
• String case
• String comparison
• String concatenation
• String interpolation (included)
• String length
• Strip a set of characters from a string
• Strip comments from a string
• Substring
• Substring/Top and tail
• Sum and product of an array
• Symmetric difference
• System time
• Take notes on the command line
• Temperature conversion
• Terminal control/Clear the screen
• Terminal control/Cursor movement
• Terminal control/Cursor positioning
• Terminal control/Dimensions
• Terminal control/Hiding the cursor
• Terminal control/Inverse video
• Terminal control/Preserve screen
• Terminal control/Ringing the terminal bell
• Terminal control/Unicode output
• Test a function
• Text between
• The Twelve Days of Christmas
• Time a function
• Tokenize a string
• Topic variable
• Topological sort
• Tree traversal
• Truncate a file
• URL decoding
• URL encoding
• Undefined values
• Unicode strings
• Universal Turing machine
• Untrusted environment
• Variable size/Get
• Variables
• Video display modes
• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Web scraping
• Word frequency