Callis callezenwaka

Software Engineer | Founder Barestripe

callezenwaka / Filter JavaScript Object

Last active July 3, 2021 09:43

How to filter out unwanted items from JavaScript object.

	// filter out unnecessary key-value pairs
	const omit = (obj, arr) =>
	Object.keys(obj)
	.filter(k => !arr.includes(k))
	.reduce((acc, key) => ((acc[key] = obj[key]), acc), {});

	let item = {name: 'John Doe', profession: 'Developer', age: 30, gender: 'male', height: '1.6m', weight: '80kg', country: 'UK'};
	let filteredItem = omit(item, ['gender', 'height', 'weight', 'country']);
	// console.log(filteredItem);

callezenwaka / Centered div

Last active July 12, 2021 20:51

How to center div with position absolute

callezenwaka / Setting google cloud functions config env.

Created July 7, 2021 03:13

Cloud Functions Config Env.

	Refer to doc here <a href="https://firebase.google.com/docs/functions/config-env">Config Env. Setup</a>

	# Set environment configuration for your project
	```
	firebase functions:config:set someservice.key="THE API KEY" someservice.id="THE CLIENT ID"
	```

	# Retrieve current environment configuration
	```
	firebase functions:config:get

callezenwaka / Padding numbers in JavaScript

Last active July 9, 2021 05:09

Number Padding In JavaScript

	// Define new date, result
	let d = new Date(), result;
	// Set new date
	d.setDate(d.getDate() + 20);
	// Return result
	result = ('0' + d.getDate()).slice(-2) + '/' + ('0' + (d.getMonth()+1)).slice(-2) + '/' + d.getFullYear();

	Explanation:
	.slice(-2) returns the last 2 characters of the string.

callezenwaka / Merge array to Firestore arrayUnion

Created December 9, 2021 17:52

	'use strict';

	// Import packages
	import admin from 'firebase-admin';
	const FieldValue = admin.firestore.FieldValue;

	// Add credential service account details
	import serviceAccount from ".path-to-file.json";

	// Initialize firebase admin sdk config

callezenwaka / Set firebase authentication in postman

Created December 17, 2021 00:12

	Setup a POST => request;

	Replace firebase api key in the url => "https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyPassword?key={FIREBASE_API_KEY}"

	Pass the following params in the body of the request
	{
	"email": "<email>",
	"password": "<password>",
	"returnSecureToken": true
	}

callezenwaka / Event.vue

Created January 19, 2022 07:24

Handle events in Vue 3 with Typescript

	<template>
	<div class="body--wrapper" :class="{ active: !slide && !width }">
	<Header"></Header>
	<div class="container">
	<router-view :key="$route.path"/>
	</div>
	</div>
	</template>

	<script lang="ts">

callezenwaka / index.html

Created January 19, 2022 09:05

Add space in html file

	<!DOCTYPE html>
	<html>
	<head>
	<title>
	How to insert spaces/tabs in text using HTML/CSS?
	</title>
	</head>
	<body>
	<h1 style="color: green">GeeksforGeeks</h1>
	<b>How to insert spaces/tabs in text using HTML/CSS?</b>

callezenwaka / Array.sol

Last active February 19, 2022 00:45

Handle array in javascript

	// SPDX-License-Identifier: GPL-3.0

	pragma solidity >=0.7.0 <0.9.0;

	/**
	* @title Storage
	* @dev Store & retrieve value in a variable
	*/
	contract Array {

callezenwaka / index.js

Created September 7, 2022 16:20

React two-way data binding

	import logo from "./logo.svg";
	import "./App.css";
	import { useState } from "react";

	function App() {
	const [food, setFood] = useState("dumpling");

	return (
	<div className="App">
	<input