All implementations assume `console.log` is a static function with side-effect. All implementations assume `Hello world!!!` is a constant and does not need to be abstracted, and thus can be inlined.
## Declarative ##
```jsx
const HelloWorld = (
Hello world!!!
);
// usage
React.render(HelloWorld, doment.body)
```
## Imperative ##
### Procedural ###
#### Direct invocation ####
```
console.log('Hello world!!!');
// usage
// none - procedural code
```
#### Subroutine ####
```
function printHelloWorld() {
console.log('Hello world!!!');
}
// usage
printHelloWorld();
```
### Static-typed object-oriented ###
#### Static ####
##### Static method #####
```
class HelloWorld {
static print() {
console.log('Hello world!!!');
}
}
// usage
HelloWorld.print();
```
##### Static invocation from method #####
```
class HelloWorld {
print() {
console.log('Hello world!!!');
}
}
// usage
new HelloWorld().print()
```
#### Injection-based ####
##### constructor injection #####
```
class HelloWorld {
constructor(console) {
this.console = console;
}
print() {
this.console.log('Hello world!!!');
}
}
// usage
new HelloWorld(console).print();
```
##### Parameter Injection #####
```
class HelloWorld {
print(console) {
console.log('Hello world!!!');
}
}
// usage
new HelloWorld().print(console);
```
##### Autowired Injection #####
```
class HelloWorld {
$console;
print(console) {
this.$console.log('Hello world!!!');
}
}
// usage
Singleton.get(HelloWorld).print(console);
```
### Inheritance ###
#### Classical Inheritance ####
```
// following code would not work as Console is not publically initializable
class HelloWorld extends Console {
print() {
this.log('Hello world!!!');
}
}
// usage
new HelloWorld().log();
```
#### Prototypical inheritance ####
```
let myConsole = Object.create(console);
myConsole.print = function () {
this.log('Hello world!!!');
};
// usage
myConsole.print();
```
#### Old-school class pattern ####
```
// following code would not work as Console is not publically initializable
function HelloWorld() {
}
HelloWorld.prototype = new Console();
HelloWorld.prototype.print = function () {
this.log('Hello world!!!');
};
// usage
new HelloWorld().log();
```
### Dynamic-typed object-oriented ###
#### Mixin ####
##### Static invocation #####
```
const HelloWorldMixin = {
printHelloWorld() {
console.log('Hello World!!!');
}
};
// usage
const obj = Object.assign({}, HelloWorldMixin);
obj.printHelloWorld();
```
##### Parameter injection #####
```
const HelloWorldMixin = {
printHelloWorld(console) {
console.log('Hello World!!!');
}
};
// usage
const obj = Object.assign({}, HelloWorldMixin);
obj.printHelloWorld(console);
```
##### Target Mixin #####
```
const HelloWorldMixin = {
printHelloWorld() {
console.log('Hello World!!!');
}
};
// usage
Object.assign(console, HelloWorldMixin);
console.printHelloWorld();
```
#### Monkey pactching ####
```
console.printHelloWorld = function() {
this.log('Hello world!!!');
}
// usage
console.printHelloWorld();
```
### Factory / Builder ###
#### Constructor Injection ####
```
function createHelloWorld(f) {
return {
print() {
f.log('Hello world!!!');
}
}
}
// usage
createHelloWorld(console).print();
```
#### Parameter Injection ####
```
function createHelloWorld() {
return {
print(console) {
console.log('Hello world!!!');
}
};
}
// usage
createHelloWorld().print(console);
```
#### IIFE / old-school module pattern ####
```
const HelloWorld = (function createHelloWorld() {
return {
print(console) {
console.log('Hello world!!!');
}
};
})();
// usage
HelloWorld.print(console);
```
## Functional programming ##
### Eager Eval ###
#### Side-effect on binding ####
```
// functional - eager eval - no side-effect
function helloWorld(console) {
return console.log('Hello world!!!');
}
// usage
helloWorld(console);
```
#### Side-effect on usage ####
```
no side-effect
function helloWorld() {
return 'Hello World!!!';
}
// usage
console.log(helloWorld());
```
### Lazy Eval ###
#### early binding ####
```
function helloWorld(f) {
return () => f.log('Hello world!!!');
}
// usage
helloWorld(console)();
```
##### Late Binding #####
```
function helloWorld() {
return (f) => f.log('Hello world!!!');
}
// usage
helloWorld()(console);
```