Category:Quackery
From Rosetta Code
This programming language may be used to instruct a computer to perform a task.
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Your Help Needed
If you know Quackery, please write code for some of the tasks not implemented in Quackery.
If you know Quackery, please write code for some of the tasks not implemented in Quackery.
Quackery is an implementation of Quackery.
Other implementations of Quackery.
Quackery is an open source, lightweight, entry level concatenative language for educational and recreational programming.
It is coded as a Python 3 function in about 50k of Pythonscript, half of which is a string of Quackery code.
The Quackery GitHub repository, which includes the Quackery manual "The Book of Quackery" as a pdf, is at github.com/GordonCharlton/Quackery.
Pages in category "Quackery"
The following 402 pages are in this category, out of 402 total.
A
- A+B
- ABC problem
- ABC words
- Abundant odd numbers
- Abundant, deficient and perfect number classifications
- Ackermann function
- Additive primes
- Almkvist-Giullera formula for pi
- Alternade words
- Amicable pairs
- Anagrams
- Anagrams/Deranged anagrams
- Angle difference between two bearings
- Anonymous recursion
- Anti-primes
- Apply a callback to an array
- Arbitrary-precision integers (included)
- Arithmetic-geometric mean
- Arithmetic/Integer
- Arithmetic/Rational
- Array concatenation
- Array length
- Arrays
- Attractive numbers
- Averages/Arithmetic mean
- Averages/Root mean square
B
C
- Caesar cipher
- Calculating the value of e
- Call a function
- Call an object method
- Cantor set
- Cartesian product of two or more lists
- Case-sensitivity of identifiers
- Catalan numbers
- Catalan numbers/Pascal's triangle
- Catamorphism
- Change e letters to i in words
- Character codes
- Check input device is a terminal
- Check output device is a terminal
- Church numerals
- Closures/Value capture
- Combinations
- Combinations with repetitions
- Comma quibbling
- Comments
- Common list elements
- Common sorted list
- Compare a list of strings
- Compile-time calculation
- Compound data type
- Conditional structures
- Continued fraction
- Convert decimal number to rational
- Convert seconds to compound duration
- Coprimes
- Copy a string
- Count how many vowels and consonants occur in a string
- Count in factors
- Count in octal
- Count occurrences of a substring
- CRC-32
- Create a two-dimensional array at runtime
- Currying
- CUSIP
D
E
- Egyptian division
- Elementary cellular automaton
- Emirp primes
- Empty program
- Empty string
- Ethiopian multiplication
- Evaluate binomial coefficients
- Even or odd
- Exceptions
- Exceptions/Catch an exception thrown in a nested call
- Execute a system command
- Execute Brain****
- Execute HQ9+
- Exponentiation operator
- Exponentiation order
- Extend your language
- Extract file extension
F
- Factorial
- Factorial base numbers indexing permutations of a collection
- Factorions
- Factors of an integer
- Fairshare between two and more
- Farey sequence
- Fibonacci n-step number sequences
- Fibonacci sequence
- Filter
- Find limit of recursion
- Find prime n such that reversed n is also prime
- Find the last Sunday of each month
- Find the missing permutation
- Find words whose first and last three letters are equal
- Find words with alternating vowels and consonants
- Five weekends
- FizzBuzz
- Flatten a list
- Floyd's triangle
- Forward difference
- Fractal tree
- Fractran
- Function composition
- Function definition
- Function prototype
- Fusc sequence
G
H
I
- Identity matrix
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Include a file
- Increment a numerical string
- Integer comparison
- Integer overflow
- Integer sequence
- Interactive programming
- Intersecting number wheels
- ISBN13 check digit
- Isqrt (integer square root) of X
- Iterated digits squaring
L
- Lah numbers
- Largest int from concatenated ints
- Largest proper divisor of n
- Last Friday of each month
- Leap year
- Least common multiple
- Left factorials
- Leonardo numbers
- Letter frequency
- Literals/Integer
- Literals/String
- Logical operations
- Long literals, with continuations
- Long multiplication
- Long year
- Longest common prefix
- Longest common suffix
- Look-and-say sequence
- Loop over multiple arrays simultaneously
- Loops/Break
- Loops/Continue
- 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
M
N
- N'th
- Naming conventions
- Narcissist
- Narcissistic decimal number
- Nimber arithmetic
- Non-continuous subsequences
- Non-decimal radices/Convert
- Number names
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers with same digit set in base 10 and base 16
- Numeric separator syntax
O
P
- Padovan sequence
- Palindrome detection
- Palindromic primes
- Palindromic primes in base 16
- Pangram checker
- Parsing/RPN calculator algorithm
- Partial function application
- Pascal's triangle
- Peano curve
- Pentagram
- Perfect numbers
- Perfect shuffle
- Perfect totient numbers
- Permutations
- Permutations with repetitions
- Permutations/Derangements
- Pernicious numbers
- Phrase reversals
- Pi
- Pick random element
- Playing cards
- Population count
- Power set
- Price fraction
- Primality by trial division
- Primality by Wilson's theorem
- Prime decomposition
- Priority queue
- Probabilistic choice
- Product of divisors
- Proper divisors
R
- Random number generator (included)
- Rare numbers
- Recaman's sequence
- Remove duplicate elements
- Remove vowels from a string
- Rep-string
- Repeat
- Repeat a string
- Return multiple values
- Reverse a string
- Reverse words in a string
- Roman numerals/Decode
- Roman numerals/Encode
- Rot-13
- RPG attributes generator
- Run-length encoding
- Runtime evaluation
S
- Sattolo cycle
- Self-describing numbers
- Self-hosting compiler
- Semiprime
- Semordnilap
- Sequence of non-squares
- Sequence of primes by trial division
- Sequence: smallest number with exactly n divisors
- Set
- Seven-sided dice from five-sided dice
- Shell one-liner
- Shift list elements to left by 3
- Show ASCII table
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Sierpinski arrowhead curve
- Sierpinski carpet
- Sierpinski curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle
- Sierpinski triangle/Graphical
- Sieve of Eratosthenes
- Simple turtle graphics
- Sleeping Beauty problem
- Sort an integer array
- Sort numbers lexicographically
- Sort stability
- Sort three variables
- Sort using a custom comparator
- Sorting algorithms/Bogosort
- Sorting algorithms/Bubble sort
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Counting sort
- Sorting algorithms/Gnome sort
- Sorting algorithms/Heapsort
- Sorting algorithms/Insertion sort
- Sorting algorithms/Merge sort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Quicksort
- Sorting algorithms/Selection sort
- Special characters
- Special variables
- Split a character string based on change of character
- Square but not cube
- Stack
- Stack traces
- Stair-climbing puzzle
- Start from a main routine
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- String append
- String case
- String concatenation
- String matching
- String prepend
- Strip a set of characters from a string
- Strip whitespace from a string/Top and tail
- Substitution cipher
- Substring
- Substring/Top and tail
- Sum and product of an array
- Sum digits of an integer
- Sum multiples of 3 and 5
- Sum of a series
- Sum of divisors
- Sum of first n cubes
- Sum of squares
- Symmetric difference
- System time
T
- Tau function
- Tau number
- Temperature conversion
- Terminal control/Clear the screen
- Terminal control/Cursor positioning
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Ringing the terminal bell
- Ternary logic
- Test a function
- Test integerness
- The Twelve Days of Christmas
- Thue-Morse
- Tokenize a string
- Totient function
- Towers of Hanoi
- Tree from nesting levels
- Trigonometric functions
- Triplet of three numbers
- Truncatable primes
- Truth table
- Two identical strings
- Two sum
