W-Mills

const foo = {
  bar: 10,
  multiplyByBar: function(...args) {
    args.forEach(arg => console.log(arg * this.bar)); // arrow function does not change the context
  }
};

const qux = foo.multiplyByBar.bind(foo);

qux(5);           // logs 50

W-Mills

const foo = {
  bar: 10,
  multiplyByBar: function(...args) {
    args.forEach(function(arg) {
      console.log(arg * this.bar);
    }, this);
  }
};

const qux = foo.multiplyByBar.bind(foo);

W-Mills

const foo = {
  bar: 10,
  multiplyByBar: function(...args) {
    args.forEach(arg => console.log(arg * this.bar));
  },
};

foo.multiplyByBar(5);        // logs 50
foo.multiplyByBar(5, 10, 15) // logs 50, then 100, then 150

W-Mills

const foo = {
  bar: 'baz',
  getBar: function() {      
    console.log(this.bar);  
  },
};              

let qux = foo.getBar;     

qux.call(foo);             // logs 'baz'

W-Mills

const foo = {
  bar: 'baz',
  getBar: function() {     // assigned as a property on an object, getBar is a method
    console.log(this.bar); // the value of this here: foo
  },
};

foo.getBar()               // logs 'baz'

let qux = foo.getBar;      // assigning the function getBar to the variable qux

W-Mills

const foo = {
  bar: 'baz',
  getBar: function() {      // assigned as a property on an object, getBar is a method
    console.log(this.bar);  // the value of this here is the direct-parent foo object context
  },
};

foo.getBar()                // logs 'baz'

const qux = foo.getBar;     // assigning the function stored as the method getBar to the variable qux in the global scope

W-Mills

{
	"PEDAC": {
		"scope": "javascript",
		"prefix": "PEDAC",
		"body": [
			"/*",
			"Input: $1",
			"Output: $2",

			"\nProblem: \n\t- $3",

W-Mills

{
	"PEDAC": {
		"scope": "ruby",
		"prefix": "PEDAC",
		"body": [
			"=begin",
			"Input: $1",
			"Output: $2",
			"\nProblem: \n\t- $3",
			"\nClarifying Questions: \n\t- $4",

W-Mills

# recreation_centre_last_example.rb

module Swimmable
  def swim
    "Can swim here!"
  end
end

class GreenSpace
  attr_accessor :name, :num_trees

W-Mills

# recreation_centre_expanded.rb

module Swimmable
  def swim
    "Can swim here!"
  end
end

class GreenSpace
  attr_accessor :name, :num_trees