pine 🍍

Utility library for deno with an FP bent.

You should be able to pull all functions straight from mod like import { take } from "https://denopkg.com/alexstory/pine/mod.ts"

I highly recommend looking at the test file for a function to see how to use it.

stability

Most of the api should be pretty stable, but for now I would pin a version as I am planning to rewrite some of the function implementations, and add things like automatic currying.

functions implemented so far:

add

add(x: number, y: number): number

Returns the numbers added together

add(2, 3) == 5

clamp

clamp(min: number, max: number, value: number): number

Returs the value within the bounds set by min and max (both inclusive)

clamp(0, 10, 20) == 10

flip

flip(fn: Function): Function

Takes a function with two parameters

Returns the function with the arguments reversed

head

head<T>(list: T[]): T

Returns the first item in a list

head([1, 2, 3]) == 1

length

length<T>(list: T[]): number

Returns the length of the list

length([1, 1, 1]) == 3

map

map<T, U>(fn: T => U, list: T[]): U

Applies a function to each item in a list, returning a new list of the results of each call

max

max(x: number, y: number): number

Returns the larger of two numbers

max(2, 4) == 4

min

min(x: number, y: number): number

Returns the smaller of two numbers

min(2, 4) == 2

reverse

reverse<T>(list: T[]): T[]

Returns the list in the reversed order

reverse([1, 2, 3]) == [3, 2, 1]

take

take<T>(n: number, list: T[]): T[]

Returns the first n items from a list

take(2, [1, 2, 3, 4, 5]) == [1, 2]

TODO:

• more tests
• automatic currying
• Option/Result types
• more tests
• redo logic for map and length
• more tests
• better way to handle type of functions

Contribute?

Want to send a pr? I’m pretty open. If you’re adding a new function, it needs to do three things:

• be in a new file
• have a matching test file
• export from mod