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View Home.js
import React from "react";
import Login from "../components/Login";
import Landing from "../Pages/Landing";
function Home(props) {
const [user, setUser] = useState();
return (
<div>
{user ?
@gregfenton
gregfenton / simple_useEffect_and_async.js
Last active Feb 26, 2021
REACT: A simple example of doing asynchronous work inside of a useEffect()
View simple_useEffect_and_async.js
/**
* A React component:
* r1. name starts with a Capital letter
* r2. gets a single argument, typically referred to as "props", that is an object containing all properties passed in
* r3. can use hooks (useState, useEffect, useRef, etc...)
* r4. returns JSX
**/
/** r1. name starts with a Capital letter */
/** r2. gets a single argument, typically named "props" */
@gregfenton
gregfenton / firestore_add_field_to_all_docs_in_collection.js
Last active Oct 25, 2021
FIRESTORE: a node/JavaScript command-line script that visits all docs in a Firestore collection and updates them with the given values (in this example, we set/add an "enabled" field to TRUE)
View firestore_add_field_to_all_docs_in_collection.js
/**
* firestore_add_field_to_all_docs_in_collection.js
*
* This script is assumed to live in an existing Javascript project that has its own package.json.
* I store this script in <PROJECT_ROOT>/tools/cleanup/.
*
* To use:
* 1. Import the 'firebase' NPM module to your project (Run the command: `npm install firebase`)
* 2. Edit the data for USER1 and FIREBASE_CONFIG, then adjust parameters in `main` for the call to `visitDocs`.
*
@gregfenton
gregfenton / c5_code_challenge_week_1.js
Last active Feb 26, 2021
JAVASCRIPT: EvolveU C5 coding challenge - week #1 - answers
View c5_code_challenge_week_1.js
// This answer comes in 2 flavours: the "plays nice with others" version and the "hax0rz rUlez!!" version.
//
//--------------------------------------------------------------------------------------
// PLAYS NICE WITH OTHERS:
//
const arr2num = (arr) => {
return arr
.reverse() // work from least-to-most significant digits
.reduce(
@gregfenton
gregfenton / get_firestore_collection_as_json.js
Last active Oct 25, 2021
FIRESTORE: a node/javascript command-line script to fetch all documents in a Firestore collection and output them to a file as JSON
View get_firestore_collection_as_json.js
// This code is a "node script" used to fetch all documents from a Firestore collection,
// either in "the cloud" or the emulator, and write them to a file as JSON.
//
// The script is a "client app", so it logs in with Firebase Auth using email/password from the variable USER1.
// This USER1 user (the.admin.guy@test.com) must exist in your Firebase project and have read access
// to the collection(s) you are populating. You can create that account via
// Firebase Console >> Authentication.
//
// Steps to use this repo:
// 1. Create a new directory and copy the 2 files (package.json & get_firestore_collection_as_json.js) to it
View adruino_http_client.c
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
const char* ssid = "xxx";
const char* password = "xxxxxxx";
const char* url = "https://api.angelcam.com/v1/events/";
const char* fingerprint = "51 87 10 92 52 38 41 A9 SD 23 V3 23 72 58 SE EF 06 8D 35 4C";
@gregfenton
gregfenton / .versionrc.js
Last active Nov 10, 2021
EXPO: configuration of standard-version-expo for a code base that has multiple configuration files
View .versionrc.js
/* What?
* A configuration for standard-version-expo that updates multiple config files
* by dynamically identifying them from a sub-directory when you bump the
* version using the `standard-version` tool
*
* How?
* Modelled from the post by @bycedric: https://dev.to/bycedric/simplify-expo-releases-with-standard-version-2f4o
* Follow the setup instructions listed at the URL above or at https://github.com/expo-community/standard-version-expo
*
* Why?
@gregfenton
gregfenton / EXPO_BARE_WORKFLOW.md
Last active Feb 26, 2021
EXPO: a description of ejecting an app from Expo Managed Workflow to run & debug it in Android Studio
@gregfenton
gregfenton / android_logcat.log
Last active Feb 26, 2021
REACT-NATIVE: output from `logcat` starting just as the UI is clicked to display the component that includes [MapView](https://docs.expo.io/versions/latest/sdk/map-view/) from react-native-maps
View android_logcat.log
09-26 13:53:23.229 1397 5471 W audio_hw_generic: Not supplying enough data to HAL, expected position 2427928 , only wrote 2427853
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: Error while updating prop left
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: java.lang.reflect.InvocationTargetException
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: at java.lang.reflect.Method.invoke(Native Method)
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: at abi38_0_0.com.facebook.react.uimanager.ViewManagersPropertyCache$PropSetter.updateShadowNodeProp(ViewManagersPropertyCache.java:7)
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: at abi38_0_0.com.facebook.react.uimanager.ViewManagerPropertyUpdater$FallbackShadowNodeSetter.setProperty(ViewManagerPropertyUpdater.java:2)
09-26 13:53:23.236 6517 6654 E unknown:ViewManager: at abi38_0_0.com.facebook.react.uimanager.ViewManagerPropertyUpdater.updateProps(ViewManagerPropertyUpdater.java:14)
09-26 13:53:23.236 6517 6654 E unknown:ViewMa
@gregfenton
gregfenton / fetch-user-records-from-google-sheets.js
Last active Oct 25, 2021
JAVASCRIPT: a node/javascript command-line script that downloads data from a worksheet in Google Sheets and stores in a local JSON file
View fetch-user-records-from-google-sheets.js
// A script that:
// 1. loads Google Sheets API keys and spreadsheet IDs (see GOOGLE_API_KEY)
// 2. connects to the identifed Google Sheet
// 3. grabs the data from a named Worksheet (see SHEET_TO_GET)
// 4. iterates over each row (see processUserRows())
// 5. puts them into a JSON structure
// 6. and writes that out to a file (see FILE_NAME)
//
// To run this script, I have this in my package.json:
//