@chrock/optional-map v0.1.2

@chrock/optional-map

@chrock/optional-map是一个基于@chrock/optional的Map包装工具库。\ @chrock/optional-map is a map wrapper tool library based on @chrock/optional.

使用示例 Example

• new OptionalMap

  import { OptionalMap } from '@chrock/optional-map';
  
  // use `OptionalMap` as a normal map
  const map = new OptionalMap<number, string>();
  map.set(1, 'Hello, World!');
  console.log(map.get(1).value); // <- 'Hello, World!'
  
  // wrap a normal map
  const normalMap = new Map<number, string>();
  normalMap.set(1, 'Hello, World!');
  const wrappedMap = new OptionalMap(normalMap);
  console.log(wrappedMap.get(1).value); // <- 'Hello, World!'

• 获取值后进行预处理\ Preprocess after getting the value

  import { OptionalMap } from '@chrock/optional-map';
  
  const map = new OptionalMap<number, string>();
  map.set(1, 'Hello, World!');
  const mapped = map.get(1).map((v) => v + '!');
  console.log(mapped.value); // <- 'Hello, World!!'
  
  const empty = map.get(2).map((v) => v + '!');
  console.log(empty.value); // <- undefined