nickdesaulniers

var urls = ['google.com', 'youtube.com', 'cracked.com'];

var fs = require('fs'),
    http = require('http'),
    url = require('url'),
    path = require('path');

var count = 0;
urls.map(url.parse).forEach(function (url) {
  http.get(url, function (res) {

nickdesaulniers

var x = 5;

function myClosure (y) {
  return x + 1;
};

console.log(myClosure(10)); // 6

nickdesaulniers

var x = 5;

function myClosure (x) {
  return x + 1;
};

console.log(myClosure(10)); // 11

nickdesaulniers

x = 5

def my_closure y
  x + 1
end

puts my_closure 10 # NameError: undefined local variable or method `x' for main:Object

nickdesaulniers

x = 5

my_closure = -> x do
  x + 1
end

puts my_closure.call 10 # 6

nickdesaulniers

fn main () {
  let x: int = 5;

  fn my_closure (y: int) {
    x + 1;
  }

  io::println(my_closure(10)); // error: attempted dynamic environment-capture, unresolved name: x
}

nickdesaulniers

fn main () {
  let x: int = 5;

  let my_closure = |_: int| -> int {
    x + 1
  };

  io::println(fmt!("%d",my_closure(10))); // 6
}

nickdesaulniers

fn main () {
  //let x: int = 5;
  let x = 5;

  //let my_closure = |_: int| -> int {
  let my_closure = |_| {
    x + 1
  };

  io::println(fmt!("%?",my_closure(10))); // 6

nickdesaulniers

// compiled with:
// clang -Wall -Wextra function_pointers.c -o function_pointers
#include "stdio.h"

void usual_syntax (void (*fn) (int x)) {
  puts("usual syntax start");
  fn(1);
  puts("usual syntax end");
}

nickdesaulniers

hello world
usual syntax start
hello 1
usual syntax end
other syntax start
hello 2
other syntax end