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LICENSE

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README.md

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+# lua-lambda
+Takes a string, returns a function for quick function definition.
+
+## Usage
+The lambda format is as follows:
+```Lua
+l"(args) expr"
+```
+
+Example:
+```Lua
+local l = require("lambda") -- Omit this in Minetest mods
+
+local add_one = l"(x) x+1"
+print(add_one(5)) --> 6
+```
+
+## Installation
+### Luarocks
+```Bash
+luarocks install lambda
+```
+
+### Minetest
+This module is availible on Minetest's [ContentDB](https://content.minetest.net/), simple add `lambda` as a dependancy to your `mod.conf` and Minetest will automatically install the module for end-users. If you wish to manually install this, then you can either clone the repositiory and add it to your `mods/` folder or download it [here](https://content.minetest.net/packages/benrob0329/lambda/).
+
+## Why?
+Because Lua needs more atomic modules which add functionality without creating a huge library. This module is supposed to be dead-simple to grab and start using in your project without adding anything extra. One of Lua's strengths is minimalism, and I think that it's ecosystem would do well to mirror that.

init.lua

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+local PATH = minetest.get_modpath(minetest.get_current_modname()) .. "/"
+
+l = dofile(PATH .. "lambda.lua")

lambda-1.0-1.rockspec

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+package = "lambda"
+version = "1.0-1"
+source = {
+	url = "https://gitlab.com/benrob0329/lua-lambda",
+	tag = "v1.0",
+}
+
+description = {
+	summary = "Atomic lambda string-parser",
+	detailed = [[
+		Compact lambda function which takes a string and returns a load()ed function.
+		Syntax: l"(args) expr"
+		Example: l"(x,y) x+y"
+	]]
+}
+
+dependencies = {
+	"lua >= 5.1"
+}
+
+build = {
+	type = "builtin",
+	modules = {
+		lambda = "lambda.lua"
+	}
+}

lambda.lua

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+local load = loadstring or load
+
+local lambda_template = "return function %s return %s end"
+local cache = {}
+
+-- Lambda Format: l"(args) exp"
+local function l(s, env)
+	if not cache[s] then
+		cache[s] = load(lambda_template:format(s:match("(%b()) (.+)$")))()
+	end
+	return cache[s]
+end
+
+-- Tests --
+do
+	local x = "Test"
+	local f = l"(x) x"
+	assert(f(x) == x, "Lambda Test Failed!")
+end
+do
+	local t = {1,2,3,4,5,6,7,8,9}
+	table.sort(t, l"(a,b) a > b")
+	assert(t[1] == 9, "Lamba Test Failed!")
+end
+
+return l

mod.conf

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+name = lambda