Hello, Mini
Write one line of text.
Samples
Browse examples by topic. Open browser-ready samples in the playground; CLI-only samples need local host access.
Basics
Bindings
Bind text and number values.
Booleans
Combine comparisons with &&.
If
Run a block when a condition holds.
If and else
Choose one of two branches.
While
Repeat while a condition holds.
Functions
Return a value from a named function.
Binding assignment
Initialize and update bindings; inspect the generated code.
Expressions
Combine arithmetic and boolean expressions; inspect the generated code.
Comments
Document declarations and implementation details.
Read defaults
See default values for missing text, list, and map entries.
Shebang
Run a source file with a shebang.
Numbers
Arithmetic
Multiply and subtract numbers.
Number to text
Print canonical decimal numbers.
Text
Text concatenation
Join text with +.
Text length
Count characters.
Characters
Read the first and last character.
Slices
Slice with positive and negative bounds.
Find
Locate a word inside text.
Split
Split text on a literal separator.
Reverse text
Walk backwards and build a new string.
Count vowels
Combine a loop with character comparisons.
UTF-8 bytes
Turn text into its byte values.
Character codes
Round-trip a character through its code point and print values directly.
Text and stdin
Normalize tabs and line endings from standard input.
Find in input
Find sample words in input text.
Slice input
Explore positive and negative slice bounds.
Split input
Print comma-separated fields.
Lists
Program arguments
Print the command-line arguments one per line.
Create a list
Set two items and read the length.
Read items
Use a negative index for the last item.
Join a list
Build a word list and format it with a separator.
Sum a list
Accumulate numbers in a loop.
Largest item
Scan a list and keep the best value.
Reverse a list
Walk a list backwards and join the items.
Stack
Push and pop from the back.
Queue
Push at the back and pop from the front.
Copy a list
Changing the copy leaves the original intact.
Lines
Split text into lines and join them again.
List mutation
Grow and update a list with mixed values.
List copy isolation
Show that a copied list can be changed independently.
Maps
Create a map
Set and read text-keyed values.
Presence
Test for a key before reading it.
Count keys
Take a key snapshot and count it.
Replace a value
Setting an existing key keeps the key count.
Copy a map
Changing the copy leaves the original intact.
Nested maps
Store a map inside another map.
Word counts
Count repeated words with a map.
Map operations
Create and update a map and inspect its keys.
Map copy isolation
Show that a copied map can be changed independently.
JSON
Maps and JSON
Build a map and print compact JSON.
Parse JSON
Parse an object and read a field.
JSON arrays
Parse an array and read an item.
Read JSON input
Parse JSON input and print its name field.
Input and output
Echo input
Copy standard input to output.
Diagnostic and exit
Write a diagnostic and exit with a status.
Files and directories
Copy a file
Read and write local files.
Temporary files
Create, read, and remove a temporary file.
Processes
Exit status
Exit when a required argument is missing.
Run a process
Capture output from a child process.
Programs and algorithms
FizzBuzz
Classic division and branching.
Factorial
A recursive function.
Fibonacci
Print an iterative sequence without manual number formatting.
Primes
Trial division up to a limit.
Palindrome
Reverse text and compare.
Caesar shift
Shift character codes by one.
Binary search
Find a value in a sorted list.
Bubble sort
Sort a small list in place.
Tokenizer
Split source text into words and symbols.
CSV sum
Parse numbers from CSV text and add them.
Games
Breakout board
Starts with Space; arrows or A/D steer; P pauses. Short tones mark wall, brick, paddle, miss, and win events.
Frogger board
Move Frogger through traffic that advances at a configurable 3 steps per second.
Pong
Move the left paddle with W/S and the right paddle with the arrow keys. The ball moves at three steps per second.
Pac-Man
Collect corridor dots with arrows or WASD and avoid the ghost as it patrols at one step per second.
Freeway
Cross the road with arrows or WASD. Three traffic lanes move at two, three, and four steps per second.
Seaquest
Steer the submarine with arrows or WASD, touch all three divers, and avoid the enemy before oxygen runs out.
Asterix runner
Press Space, W, or Up to jump incoming obstacles. Clear them at three steps per second.
Snake
Steer with arrows or WASD, eat the red food, and avoid walls and your tail. Moves at three steps per second.
Space Invaders
Move with arrows or A/D, fire with Space, and clear the formation before it reaches you. Invaders move twice per second; shots move four times per second.
Tetris
Move with arrows or A/D, rotate with Up/W, soft-drop with Down/S, hard-drop with Space, and clear rows. Pieces fall twice per second.
Lunar Lander
Use Up or Space to spend fuel and slow down, steer toward the green pad, and land at two positions per second with speed two or less.
Q*bert
Hop with diagonal arrow moves (Up/Left go up; Right/Down go down) and change every tile's color.
Pixel art
One pixel
Render a single white pixel once on a black ten-by-ten board.
Pixel heart
Build and render a red heart once from a ten-by-ten text pattern.
Lines and shapes
Render a horizontal line, outline box, and diagonal once on a ten-by-ten board.
Tiny house and arrow icons
Render a small house and a right arrow once on a ten-by-ten board.
Checkerboard
Render a two-color checkerboard once on a ten-by-ten board.
Color stripes
Render alternating vertical colors once on a ten-by-ten board.
Color gradient
Render a horizontal blue-to-lavender color gradient once on a ten-by-ten board.
Animation
Soft color pulse
Ease a centered pixel between soft blue shades at four color steps per second.
Wrap-around pixel
Move a pixel across the board at three steps per second and wrap at the edge.
Friendly blink
A warm smiling face blinks about once every three seconds on a soft blue background.
Moving pixel
Move and bounce a pixel at a configurable 5 steps per second.
Dynamic canvas size
Draw new frames on the same canvas while its square size changes from five to nine pixels, three times per second.
Beating heart
Pulse a pixel heart about once per second between two sizes and shades of red.
Falling rain
Move three drops at three steps per second and wrap them to the top.
Tiny walk cycle
Switch between small character poses to suggest walking.
Bouncing mini
Bounce a colorful mini wordmark around a large blue screen at 3 steps per second.
Interaction
Arrow keys
Move the yellow pixel around the green goal with arrows or WASD.
Draw with the pointer
Move the pointer across the canvas to paint a lasting trail of pixels.
Light switch
Press Space or Enter to switch a small lamp on and off.
Mini maze
Use arrows or WASD to reach the green goal without crossing walls.
Audio
Tone keys
Play four short tones with the arrow keys or WASD; the canvas stays responsive without an update loop.
Chord pad
Play C, F, or G major chords using keys 1–3 or the arrow keys.
Pointer soundboard
Move over and click one of four colored pads to play its note.
Slow arpeggio
Press Space to start or pause a four-note melody paced at two notes per second.