snippets

A collection of code snippets for software developers

A collection of code snippets for software developers.

Snippets

Swift

Reusable protocol

Easy UITableView/UICollectionView cell registering/dequeuing with the power of protocols and extensions

Subscript with default arguments

Swift 5.2 added subscript with default arguments, it gets quite powerful for custom subscripts, but also default ones like in this example

Screenshot from UIView

Typescript

Get a random element from array

Python

Read and write JSON

Print to the same line

Print to console using the same line (useful for progress logging)

NextJS

Create dynamic pages in NextJS

Create dynamic pages that fetch their content from an API in NextJS

Docker

Use Docker networks to share the same localhost

Use Docker networks to share the same localhost between containers.

Django

Pre-populate fields in Django admin

Pre-populate fields' text based on the content of another field in Django admin

Validate email address format

Check whether a string has a valid email address format or not.

```swift
extension String {
	var isValidEmailAddress: Bool {
		guard !isEmpty else { return false }
		let regex = #"(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])"#
		guard let match = range(of: regex, options: .regularExpression, range: nil, locale: nil) else { return false }
		let aCount = distance(from: match.lowerBound, to: match.upperBound)
		return aCount == count
	}
}
```

Reusable protocolSwift

Subscript with default argumentsSwift

Screenshot from UIViewSwift

Get a random element from arrayTypescript

Read and write JSONPython

Print to the same linePython

Create dynamic pages in NextJSNextJS

Use Docker networks to share the same localhostDocker

Pre-populate fields in Django adminDjango