match operator

Match-Operator

PHP verfügt über eine Kontrollstruktur namens match, die ab PHP8.0 eingeführt wurde.

Es ist wie eine Vereinfachung der switch .

Beispiel:

 $ food = ' strawberry ' ;
$ description = match ( $ food ) {
  ' apple ' => ' This food is an apple ' ,
  ' strawberry ' , ' raspberry ' => ' This food is a red fruit ' ,
}; // This food is a red fruit

$ food = ' unknown ' ;
$ description = match ( $ food ) {
  ' apple ' => ' This food is an apple ' ,
  ' strawberry ' , ' raspberry ' => ' This food is a red fruit ' ,
}; // UnhandledMatchError

$ food = ' unknown ' ;
$ description = match ( $ food ) {
  ' apple ' => ' This food is an apple ' ,
  ' strawberry ' , ' raspberry ' => ' This food is a red fruit ' ,
  default => ' This food is unknown ' ,
}; // This food is unknown

Verwendung

Dieses Paket ist ein Versuch, diese Kontrollstruktur so nah wie möglich an eine JS-Funktion zu portieren.

Beispiel:

 import match from 'match-operator'

const food = 'strawberry'
const description = match ( food , [
  [ 'apple' , 'This food is an apple' ] ,
  [ 'strawberry' , 'raspberry' , 'This food is a red fruit' ] ,
] ) // This food is a red fruit

const food = 'unknown'
const description = match ( food , [
  [ 'apple' , 'This food is an apple' ] ,
  [ 'strawberry' , 'raspberry' , 'This food is a red fruit' ] ,
] ) // UnhandledMatchError

const food = 'unknown'
const description = match ( food , [
  [ 'apple' , 'This food is an apple' ] ,
  [ 'strawberry' , 'raspberry' , 'This food is a red fruit' ] ,
  [ match . default , 'This food is unknown' ]
] ) // This food is unknown 

Alternative Syntax

Sie können eine Reihe von Themen verwenden, wenn Sie sie besser lesbar finden.

 const description = match ( food , [
  [ [ 'strawberry' , 'raspberry' ] , 'This food is a red fruit' ] ,
] ) 

Installation

 npm install match-operator --save # If you're using NPM
yarn add match-operator # If you're using Yarn

Tests

 npm run test # If you're using NPM
yarn test # If you're using Yarn

Haftungsausschluss

Dies ist mein erstes Typescript-Paket – bitte seien Sie nett!

Lizenz

MIT.