Alejandro Pérez Martín AlejandroPerezMartin

## def_par_9.js
const isRequired = () => { throw new Error('param is required'); };

function filterEvil(array, evil = isRequired()) {
  return array.filter(item => item !== evil);
}

## button-focus-remover.ts
import { Directive, HostListener, ElementRef } from '@angular/core';

/**
 * This directive removes focus from the selectors after clicking on them
 */
@Directive({
  selector: 'button, a' // your selectors here!
})
export class FocusRemover {
  constructor(private elRef: ElementRef) {}

## angularjs-providers-explained.md

      
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                demisx
                / angularjs-providers-explained.md
            
            
              Last active
              May 17, 2024 03:38
            
              
                AngularJS Providers: Constant/Value/Service/Factory/Decorator/Provider
              
          
Provider
Singleton
Instantiable
Configurable


Constant
Yes
No
No


Value
Yes
No
No


Service
Yes
No
No


Factory
Yes
Yes
No


Decorator
Yes
No?
No


Provider
Yes
Yes
Yes


Constant
	const isRequired = () => { throw new Error('param is required'); };

	function filterEvil(array, evil = isRequired()) {
	return array.filter(item => item !== evil);
	}
	import { Directive, HostListener, ElementRef } from '@angular/core';

	/**
	* This directive removes focus from the selectors after clicking on them
	*/
	@Directive({
	selector: 'button, a' // your selectors here!
	})
	export class FocusRemover {
	constructor(private elRef: ElementRef) {}
Provider	Singleton	Instantiable	Configurable
Constant	Yes	No	No
Value	Yes	No	No
Service	Yes	No	No
Factory	Yes	Yes	No
Decorator	Yes	No?	No
Provider	Yes	Yes	Yes