Benjamin Bestmann BenBestmann

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BenBestmann / rxjs-suspend.ts

Last active April 1, 2024 20:54

React Suspend behavior for RXJS Observables. Handles the suspension of emitted values of the source observable by prepending values for loading and error states.

	function suspend<T>(): OperatorFunction<T, SuspendedValue<T>> {
	return (source: Observable<T>) =>
	source.pipe(
	map((next) => ({
	value: next,
	isLoading: false,
	error: null
	})),
	catchError((error) => of({ error, isLoading: false, value: null })),
	startWith({ isLoading: true, value: null, error: null })

BenBestmann / constructor.js

Last active August 23, 2016 06:55

ES6 Constructor Pattern

	class Car {
	constructor(opts) {
	this.model = opts.model;
	this.year = opts.year;
	this.miles = opts.miles;
	}
	toString() {
	return this.model + ' has driven ' + this.miles + ' miles';
	}
	}

BenBestmann / named-parameters.js

Last active July 1, 2016 14:21

Simulate named parameters in ES5 using an object literal, passing multiple parameters as a single actual parameter.

	function selectEntries(options) {
	options = options \|\| {};
	var start = options.start \|\| 0;
	var end = options.end \|\| -1;
	var step = options.step \|\| 1;
	// function implementation
	}

	selectEntries({ start: 3, end: 20, step: 2 });

BenBestmann / probability.js

Last active July 1, 2016 14:22

Let some event happen by a given probability. Will return true or false given a certain probability in percent (1-99).

	function takeChance(probability) {
	probability = probability / 100;
	return !!probability && Math.random() <= probability;
	}

	function selectEntries(options) {
	options = options \|\| {};
	var start = options.start \|\| 0;
	var end = options.end \|\| -1;
	var step = options.step \|\| 1;
	// function implementation
	}

	selectEntries({ start: 3, end: 20, step: 2 });