Web Development · Notes

Fri, 08 May 2026 11:42:49 GMT

JavaScript closure

function outside(x) {
    function inside(y) {
        return x + y;
    };
    return inside;
}

fn_inside = outside(5);
result = fn_inside(3); // 8
result = fn_inside(5); // 10
result = fn_inside(8); // 13

function makeCounter() {
  let count = 0;
  return function() {
    return count++;
  };
}

let counter1 = makeCounter();
let counter2 = makeCounter();

alert(counter1()); // 0
alert(counter1()); // 1

alert(counter2()); // 0 (independent)

Fri, 08 May 2026 11:40:29 GMT

Git repository

Create a new repository on the command line

echo "# test-repo" >> README.md
git init
git add README.md
git commit -m "first commit"
git branch -M main
git remote add origin https://github.com/brettkromkamp/test-repo.git
git push -u origin main

…or push an existing repository from the command line

git remote add origin https://github.com/brettkromkamp/test-repo.git
git branch -M main
git push -u origin main