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https://github.com/aNNiMON/Own-Programming-Language-Tutorial.git
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158 lines
3.3 KiB
Markdown
158 lines
3.3 KiB
Markdown
# OwnLang
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[![Build Status](https://travis-ci.org/aNNiMON/Own-Programming-Language-Tutorial.svg?branch=latest)](https://travis-ci.org/aNNiMON/Own-Programming-Language-Tutorial)
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OwnLang - dynamic functional programming language inspired by Scala and Python. Available for PC, Android and Java ME devices.
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## Installing
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| Free | Pro | Desktop |
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| :--: | :-: | :-----: |
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| [![Free](https://developer.android.com/images/brand/en_generic_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.annimon.ownlang.free) | [![Pro](https://developer.android.com/images/brand/en_generic_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.annimon.ownlang) | [v1.4.0](https://github.com/aNNiMON/Own-Programming-Language-Tutorial/releases/tag/v1.4.0)
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Also available as AUR package:
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```
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yay -S ownlang
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```
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## Key features
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#### Higher-order functions
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Functions are values, so we can store them to variables for operating.
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```scala
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operations = {
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"+" : def(a,b) = a+b,
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"-" : def(a,b) = a-b,
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"*" : def(a,b) = a*b,
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"/" : ::division
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}
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def division(v1, v2) {
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if (v2 == 0) return "error"
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return v1 / v2
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}
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for operation : operations {
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println operation(2, 3)
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}
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```
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#### Pattern Matching
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Pattern matching with value pattern, tuple pattern, list pattern and optional condition.
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```scala
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def factorial(n) = match n {
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case 0: 1
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case n if n < 0: 0
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case _: n * factorial(n - 1)
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}
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def fizzbuzz(limit = 100) {
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for i = 1, i <= limit, i++ {
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println match [i % 3 == 0, i % 5 == 0] {
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case (true, false): "Fizz"
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case (false, true): "Buzz"
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case (true, true): "FizzBuzz"
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case _: i
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}
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}
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}
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```
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#### Functional data operations
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Operate data in functional style.
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```scala
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use ["std", "functional"]
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nums = [1,2,3,4,5,6,7,8,9,10]
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nums = filter(nums, def(x) = x % 2 == 0)
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// Squares of even numbers
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squares = map(nums, def(x) = x * x)
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foreach(squares, ::echo)
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// Sum of squares
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sum = reduce(squares, 0, def(x, y) = x + y)
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println "Sum: " + sum
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// Same using stream
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println "Sum: " + stream(range(1, 11))
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.filter(def(x) = x % 2 == 0)
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.map(def(x) = x * x)
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.reduce(0, def(x, y) = x + y)
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```
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#### Operator overloading
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Why not?
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```scala
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use ["std", "types", "math"]
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def `..`(a, b) = range(a, b)
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def `**`(a, b) = int(pow(a, b))
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for y : 1 .. 10 {
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println sprintf("2 ^ %d = %d", y, 2 ** y)
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}
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```
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#### Network module
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Easy async HTTP requests with `http` module.
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```scala
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use "std"
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use "http"
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use "functional"
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// GET request
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http("https://api.github.com/events", def(r) {
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use "json"
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events = jsondecode(r)
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})
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// POST request
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http("http://jsonplaceholder.typicode.com/users", "POST", {
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"name": "OwnLang",
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"versionCode": 10
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}, ::echo)
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// PATCH request
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http("http://jsonplaceholder.typicode.com/users/2", "PATCH", {"name": "Patched Name"}, ::patch_callback)
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def patch_callback(v) {
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println v
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}
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```
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## Language specification
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[English](https://annimon.com/docs/ownlang/en/) and [Russian](https://annimon.com/docs/ownlang/ru/)
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[Examples](examples/)
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## Build
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Build using Gradle `./gradlew dist`
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or take a look to [latest release](https://github.com/aNNiMON/Own-Programming-Language-Tutorial/releases/latest) for binaries.
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## Run
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To run script use command
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`java -jar OwnLang.jar -f input.own`
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or
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`java -jar OwnLang.jar < input.own`
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## License
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MIT - see [MIT licence information](LICENSE)
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