plusn.hs

createPlusN n x = x+n

f = createPlusN 2
g = createPlusN 5
main = putStrLn $ show (f(g 6))

plusn.java

interface Function1<P1, R>{
	R apply(P1 p1);
}

public class plusn{ // Java naming conventons ignored to allow plusn.<programming language suffix> convention.
	
	static Function1<Integer, Integer> createPlusN(final Integer n){
		return new Function1<Integer, Integer>(){
			public Integer apply(Integer x){
				return x+n;
			}
		};
	};
	
	public static void main(String...args){
		Function1<Integer, Integer> f = createPlusN(2);
		Function1<Integer, Integer> g = createPlusN(5);
		System.out.println(f.apply(g.apply(6)));
	}
	
}

plusn.js

function createPlusN(n){
	return function (x){
		return x+n;
	};
};

var f = createPlusN(2);
var g = createPlusN(5);
console.log(f(g(6)));

plusn.php

<?php
function createPlusN($n){
	return function ($x) use($n){
		return $x+$n;
	};
};

$f = createPlusN(2);
$g = createPlusN(5);
echo $f($g(6));

plusn.scala

def createPlusN(n: Int) =
	(x: Int) => x+n

val f = createPlusN(2)
val g = createPlusN(5)
println(f(g(6)))

plusn.sh

#!/bin/bash

# Rather for fun

function createPlusN {
	local n=$1
	local f="/tmp/plus-$n"
	(echo "#!/bin/bash"; echo "echo \$((\$1+$n))") > "$f"
	chmod +x "$f"
	echo "$f"
}

f=$(createPlusN 2)
g=$(createPlusN 5)

echo $($f $($g 6))