# Category:Wren-fmt

**Library**

This is an example of a library. You may see a list of other libraries used on Rosetta Code at Category:Solutions by Library.

**Wren-fmt** is a module which adds basic formatting capabilities to the Wren programming language. It consists of static methods organized into 2 classes: Conv and Fmt. As it is expected they will be mostly used within interpolated strings, most methods in the Fmt class have very short names reminiscent of the *printf* verb names in C-family languages.

It is the first in a series of modules (listed on the language's [main page]) designed to assist with writing Rosetta Code tasks so the same code does not have to be written or copy/pasted time and time again thereby bloating a task's script code unnecessarily.

To use it all you need to do is to copy the source code (in the [talk page]) to a text file called *fmt.wren* and place this in the same directory as the importing script so the command line interpreter can find it.

## Pages in category "Wren-fmt"

The following 325 pages are in this category, out of 325 total.

### A

- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- ABC problem
- ABC words
- Abelian sandpile model
- Abelian sandpile model/Identity
- Abundant odd numbers
- Align columns
- Aliquot sequence classifications
- Almkvist-Giullera formula for pi
- Alternade words
- Amicable pairs
- Angles (geometric), normalization and conversion
- Arbitrary-precision integers (included)
- Attractive numbers
- Average loop length
- Averages/Mean angle
- Averages/Mean time of day
- Averages/Simple moving average

### B

### C

- Calkin-Wilf sequence
- Canonicalize CIDR
- Carmichael 3 strong pseudoprimes
- Catalan numbers
- Changeable words
- Chebyshev coefficients
- Chemical calculator
- Chernick's Carmichael numbers
- Chinese zodiac
- Cholesky decomposition
- Chowla numbers
- Cistercian numerals
- Combinations and permutations
- Conjugate transpose
- Continued fraction/Arithmetic/Construct from rational number
- Convert decimal number to rational
- Count in octal
- Count occurrences of a substring
- Count the coins
- CRC-32
- Create an HTML table
- Cuban primes
- Cumulative standard deviation
- Cut a rectangle

### D

- Damm algorithm
- De Bruijn sequences
- Decimal floating point number to binary
- Deming's Funnel
- Determinant and permanent
- Determine if a string has all the same characters
- Determine if a string has all unique characters
- Determine if a string is collapsible
- Determine if a string is numeric
- Determine if a string is squeezable
- Digital root
- Digital root/Multiplicative digital root
- Discordian date
- Display a linear combination
- Doubly-linked list/Traversal
- Draw a cuboid

### E

- EKG sequence convergence
- Element-wise operations
- Elementary cellular automaton
- Elementary cellular automaton/Infinite length
- Elliptic curve arithmetic
- Equilibrium index
- Esthetic numbers
- Euler method
- Evaluate binomial coefficients
- Even or odd
- Exponentiation order
- Exponentiation with infix operators in (or operating on) the base
- Extra primes
- Extract file extension

### F

- Faces from a mesh
- Factorial
- Factors of a Mersenne number
- Factors of an integer
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fibonacci n-step number sequences
- Fibonacci word
- File extension is in extensions list
- Find first and last set bit of a long integer
- Find palindromic numbers in both binary and ternary bases
- Find words with alternating vowels and consonants
- First class environments
- First power of 2 that has leading decimal digits of 12
- First-class functions/Use numbers analogously
- Floyd's triangle
- Formatted numeric output
- Forward difference
- Functional coverage tree
- Fusc sequence

### G

### H

### I

### K

### L

- Lah numbers
- Latin Squares in reduced form
- Left factorials
- Letter frequency
- Linear congruential generator
- Long multiplication
- Long primes
- Longest common prefix
- Longest palindromic substrings
- Loops/Increment loop index within loop body
- Loops/Nested
- Loops/Wrong ranges
- LU decomposition
- Ludic numbers
- Luhn test of credit card numbers

### M

- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Magnanimous numbers
- Main step of GOST 28147-89
- Map range
- Matrix multiplication
- Matrix transposition
- Matrix-exponentiation operator
- Mayan calendar
- Mayan numerals
- MD4
- MD5
- MD5/Implementation
- Memory layout of a data structure
- Merge and aggregate datasets
- Mertens function
- Metallic ratios
- Middle three digits
- Mind boggling card trick
- Minimal steps down to 1
- Minimum positive multiple in base 10 using only 0 and 1
- Minkowski question-mark function
- Monads/Maybe monad
- Monads/Writer monad
- Monte Carlo methods
- Move-to-front algorithm
- Multidimensional Newton-Raphson method
- Multifactorial
- Multiplication tables
- Multisplit
- Möbius function

### N

- N'th
- Names to numbers
- Negative base numbers
- Nimber arithmetic
- Non-continuous subsequences
- Non-decimal radices/Convert
- Non-decimal radices/Input
- Non-decimal radices/Output
- Numbers with equal rises and falls
- Numeric separator syntax
- Numerical integration
- Numerical integration/Adaptive Simpson's method
- Numerical integration/Gauss-Legendre Quadrature
- NYSIIS

### P

- Palindrome dates
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Partition an integer x into n primes
- Pascal matrix generation
- Pascal's triangle
- Pascal's triangle/Puzzle
- Pathological floating point problems
- Pell's equation
- Permutation test
- Permutations/Derangements
- Permutations/Rank of a permutation
- Pierpont primes
- Pisano period
- Population count
- Powerful numbers
- Price fraction
- Price list behind API
- Primality by trial division
- Primality by Wilson's theorem
- Prime conspiracy
- Prime decomposition
- Primorial numbers
- Print debugging statement
- Probabilistic choice
- Product of divisors
- Proof
- Proper divisors

### R

### S

- SEDOLs
- Separate the house number from the street name
- Sequence of non-squares
- Sequence of primes by trial division
- Sexy primes
- SHA-1
- SHA-256
- SHA-256 Merkle tree
- Show ASCII table
- Singly-linked list/Traversal
- Smith numbers
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve triangle solitare puzzle
- Sort a list of object identifiers
- Sort an outline at every level
- Sort three variables
- Sorting algorithms/Cocktail sort with shifting bounds
- Soundex
- Spiral matrix
- Square-free integers
- Stair-climbing puzzle
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Strassen's algorithm
- Strong and weak primes
- Sum digits of an integer
- Sum of divisors
- Super-d numbers
- Superpermutation minimisation

### T

- Tau function
- Tau number
- Taxicab numbers
- Temperature conversion
- Test integerness
- Text between
- Text completion
- Text processing/1
- Text processing/2
- Textonyms
- Thiele's interpolation formula
- Three word location
- Topswops
- Totient function
- Trabb Pardo–Knuth algorithm
- Trigonometric functions
- Truncatable primes
- Twin primes
- Two bullet roulette
- Type detection