Introduction to FP

compose.js

function compose(f,g) {
  return function (a) {
    return g(f(a));
  };
}

function add1(x) {
  return x + 1;
}

function times2(x) {
  return x * 2;
}

function stringLength(s) {
  return s.length;
}

curry.js

function curry(f) {
  return function (a) {
    return function (b) {
      return f(a, b);
    };
  };
}

function add(x, y) {
  return x + y;
}

function repeat(n,s) {
  return [...Array(n).keys()].map(function (x) { return s; }).reduce(function (a, b) { return a + b; });
}

presentation.js

function foo(x, zs) {
  var a = bar(x);
  var b = bar(x);
  baz(a, b);
  var c = a + b;
  var d = zs.map(function (x) { return f(1,x); }).map(g);
  return q(c, d);
}

function main() {
  console.log("foo: " + foo(4, input));
  //console.log("foo1: " + foo1(4, input));
}

var input = [1,2,3,4,5,6];

function compose(f,g) {
  return function (a) {
    return g(f(a));
  };
}

function curry(f) {
  return function (a) {
    return function (b) {
      return f(a, b);
    };
  };
}

function bar(x) {
  return Math.sqrt(x);
}

function baz(a, b) {
  return a + b;
}

function f(n, x) {
  return n + x;
}

function g(x) {
  return x * 2;
}

function q(b, xs) {
  return xs.map(function (y) {
    return Math.pow(y, b);
  });
}