by-jituanlin-match

by-jituanlin-match

What is

A convenient function as an alternative to the switch statement.

Why and How

Before	After
let answer; switch (value) { case 1: answer = 'one'; break; default: answer = 'forty-two'; } ... <div> {answer} <div/>	// The match function call is a expression, // you can use it directly in jsx <div> {match(value)( [1, 'one'], [stubTrue, 'forty-two'] )} <div/>
switch (value) { case _.isArray(value): doSomething(value); break; case _.isNumber(value): doAnotherThing(value); break }	// Support for parameters of function types. // Its return value will be used as the return value of the match function. match(value)( [_.isArray,doSomething], [_.isNumber,doAnotherThing] )
switch (value) { case 1: switch (anotherValue) { case 2: return 'one then two'; default: return 'default'; } default: return 'default'; }	// If the branch does not match (or returns null), // subsequent branches will continue to be performed match(value)( [1,match(anotherValue)( [2, 'one then two']) ], [stubTrue, 'default'] );

Install and Import

install: npm install by-jituanlin-match or yarn add by-jituanlin-match

then import {stubTrue,match} from 'by-jituanlin-match' or

const {stubTrue,match} = require('by-jituanlin-match')