Arijit Bhattacharya hoodwink73

JavaScript performer, Honest effort admirer

hoodwink73 / gist:c046350fc689c2fd0b65016842f38086

Created May 17, 2020 13:18

Batch and iterate async tasks

	import ASQ from 'asynquence';
	import "asynquence-contrib"
	import fetch from 'isomorphic-unfetch';

	var fetcher = (url) =>
	ASQ(url)
	.then((done) =>
	fetch(url)
	.then(res => res.json())
	.then((data) => done(data))

hoodwink73 / getGradedSumInsured.js

Last active May 19, 2020 14:44

Template to quickly parse CSV using Papaparse and quokka

	function getGradedSumInsured (data) {
	return data.reduce((result, member) => {
	if (member["Relationship"] === "self") {
	var si = member["Sum Insured"]
	if (result[si]) {
	result[si].push(member["Email"])
	} else {
	result[si] = [member["Email"]]
	}
	}

hoodwink73 / download-file.js

Created December 26, 2019 08:26

Create downloadable files on the client side

	// https://stackoverflow.com/a/18197341/1481710
	function download(filename, text) {
	var element = document.createElement('a');
	element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
	element.setAttribute('download', filename);

	element.style.display = 'none';
	document.body.appendChild(element);

	element.click();

hoodwink73 / yup.equalTo.js

Created November 25, 2019 11:47

Yup schema method to ensure a field value equals field value of another field. Useful for fields like confirm password field

	// thanks 🙏
	// https://github.com/jquense/yup/issues/97

	function equalTo(ref, msg) {
	return this.test({
	name: 'equalTo',
	exclusive: false,
	message: msg \|\| '${path} must be the same as ${reference}',
	params: {
	reference: ref.path

hoodwink73 / pluralize.js

Created November 13, 2019 11:39

Template tag for pluralise

	// this is a tagged template function
	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#Tagged_templates
	// Example
	// pluralize`You have ${events.length} ${["meeting","meetings"]} today`
	export default function pluralize(
	strings,
	num,
	[singularWord, pluralWord] = []
	) {
	let word, emptyWord;

hoodwink73 / 1. the-basic-problem.js

Last active November 1, 2019 04:24

Understanding transducers

	function add1(v) { return v + 1};
	function isOdd(v) {return v % 2 === 1};
	function sum (total, v) {return total + v};

	var list = [2, 5, 8, 11, 14, 17, 20];

	list
	.map(add1)
	.filter(isOdd)
	.reduce(sum)

hoodwink73 / showErrorOnTouchedField.js

Created October 24, 2019 09:15

Utility fns while using Formik

	const shouldShowError = () => {
	var { touched, errors } = form;
	return Object.entries(touched).some(
	([key, value]) => value && errors[key]
	);
	};

hoodwink73 / trampolined-fibonnaci.js

Created October 7, 2019 06:46

Trampolined Fibonnaci

	var trampoline = (fn) =>
	(...args) => {
	var result = fn(...args);

	while (typeof result === "function") {
	result = result()
	}

	return result
	}

hoodwink73 / Homemade-Observable.js

Created October 5, 2019 06:58

This a simple demonstration of what is an observable –– just an object with a subscribe(forEach) method

	function Observable(forEach) {
	this._forEach = forEach;
	}

	Observable.prototype = {
	forEach: function(onNext, onError, onCompleted) {
	if (typeof onNext === "function") {
	this._forEach({
	onNext: onNext,
	onError: onError \|\| function() {},

hoodwink73 / job_roles_angel_list.js

Last active August 11, 2019 14:30

A list of professional roles. Extracted from Angel List and Mixpanel

	export const USER_JOB_ROLES = new Map([
	[
	"Software Engineer",
	[
	"Mobile Developer",
	"Frontend Developer",
	"Backend Developer",
	"Full-Stack Developer",
	"Engineering Manager",
	"QA Engineer",