Firebase Cheat Sheet

14.3k members in the Firebase community. Community supported discussions on Google's Firebase platform. Press J to jump to the feed. Press question mark to learn the rest of the keyboard shortcuts. User account menu. I wrote a cheatsheet for Firestore beginners. Cheat sheet Now that users can successfully save their favorite restaurants to Firebase, let's make sure they can view the list of restaurants they've saved. Paragon ntfs for mac os 10. To do this, we'll integrate another open source library called FirebaseUI-Android. Angular Firebase Cheat Sheetcovers all essential things which are needed for creating a variety of web applications such as Authentication, posting data and retrieving data from cloudfirestore and uploading an image on firebase. The one-page guide to Firebase: usage, examples, links, snippets, and more.

Regular Expressions are notoriously difficult to learn - they have a very compact syntax that ends up looking like gibberish. However, they can be extremely powerful when it comes to form validation, find and replace tasks, and/or searching through a body of text. The following cheatsheet provides common RegEx examples and techniques for the JavaScript developer.

🔥 There are several awesome tools that can help you debug RegEx in the browser - my personal favorite is RegExr.

How do you Pronounce RegEx?

Much like Gif vs Jif, the proper pronunciation of RegEx is passionately debated among developers. Based on my limited twitter poll, in looks like most prefer the hard G over the soft J. Codecs for mac perian.

Before I make a video about Regular Expressions.. How do you pronounce it?

— fireship.io (@fireship_dev) May 18, 2020

Regex Reference

Basics

/ expression / flags, i.e /[A-Z]+/g basic format
/ hello?*/ escape special characters with backslashes
() group with parentheses
| logical OR

Character classes

w word d digit s whitespace (tabs, line breaks)
W NOT word D NOT digit S NOT whitespace
t tabs, n line breaks
. any character (except newline)

Brackets

[xyz] match any x, y, z
[J-Z] match any capital letters between J & Z.
[^xyz] NOT x, y, z

Quantification

bob|alice match bob or alice
z? zero or one occurrences
z* zero or multiple occurrences
z+ one or multiple occurrences
z{n} n occurrences
z{min,max} min/max occurrences

Anchors

hello world exact match
^hello start of the strings
world$ end of the string

How to Use RegEx in JavaScript

Create a Regular Expression

There are two ways to create a regular expression in JavaScript. The literal way is just a set of characters between two forward slashes / /.

You can also instantiate RegExp.

String Regex Functions

There are several ways to use a regular expression on a string primitive, such as (1) match all the occurrences, (2) search for the existence of a pattern, or (3) replace matches with a new value.

Common Examples

Password Validation

How do you validate the format of a password for a signup form? Let’s force passwords to contain a capital letter, lowercase letter, number, and min length of 8.