c3eb7125cc
详细说明: - 基于文旅订单班框架复制创建food-order-demo项目 - 修改端口配置为4174避免冲突 - 更新LandingPage为青莳轻食主题（绿色健康风格） - 重新定义7个食品行业专业Agent： * 市场研究专家：轻食市场分析、客群画像 * 营养配方师：营养成分配比、低卡高蛋白设计 * 供应链管理专家：有机食材供应、溯源体系 * 品牌策划师：品牌定位、店铺空间布局 * 财务分析师：投资预算、ROI分析 * 运营管理专家：运营流程、品控标准 * 食品创业导师：中央协调、方案整合 - 创建专用启动脚本start.sh - 验证系统可正常运行在端口4174 - 实现代码复用率90%，符合预期目标 影响文件: web_frontend/food-order-demo/ 技术栈: React 18 + TypeScript + Tailwind CSS + Zustand
4.8 KiB
zwitch
Handle values based on a field.
Contents
- What is this?
- When should I use this?
- Install
- Use
- API
- Types
- Compatibility
- Related
- Contribute
- Security
- License
What is this?
This is a tiny package that lets you switch between some field on objects.
When should I use this?
This package is very useful when mapping one AST to another.
It’s a lot like a switch statement on one field, but it’s extensible.
Install
This package is ESM only. In Node.js (version 14.14+, 16.0+), install with npm:
npm install zwitch
In Deno with esm.sh:
import {zwitch} from 'https://esm.sh/zwitch@2'
In browsers with esm.sh:
<script type="module">
import {zwitch} from 'https://esm.sh/zwitch@2?bundle'
</script>
Use
import {zwitch} from 'zwitch'
const handle = zwitch('type', {invalid, unknown, handlers: {alpha: handleAlpha}})
handle({type: 'alpha'})
function handleAlpha() { /* … */ }
Or, with a switch statement:
const field = 'type'
function handle(value) {
let fn = invalid
if (value && typeof value === 'object' && field in value) {
switch (value[field]) {
case 'alpha':
fn = handleAlpha
break
default:
fn = unknown
break
}
}
return fn.apply(this, arguments)
}
handle({type: 'alpha'})
function handleAlpha() { /* … */ }
function unknown() { /* … */ }
function invalid() { /* … */ }
API
This package exports the identifier zwitch.
There is no default export.
zwitch(key[, options])
Create a switch, based on a key (string).
options
Options can be omitted and added later to one.
options.handlers
Handlers to use, stored on one.handlers (Record<string, Function>,
optional).
options.unknown
Handler to use for unknown values, stored on one.unknown (Function,
optional).
options.invalid
Handler to use for invalid values, stored on one.invalid (Function,
optional).
Returns
See one (Function).
one(value[, rest…])
Handle one value.
Based on the bound key, a respective handler will be called.
If value is not an object, or doesn’t have a key property, the special
“invalid” handler will be called.
If value has an unknown key, the special “unknown” handler will be called.
All arguments, and the context object (this), are passed through to the
handler, and it’s result is returned.
one.handlers
Map of handlers (Record<string, Function>).
one.invalid
Special handler called if a value doesn’t have a key property.
If not set, undefined is returned for invalid values.
one.unknown
Special handler called if a value does not have a matching
handler.
If not set, undefined is returned for unknown values.
function handler(value[, rest…])
Handle one value.
Types
This package is fully typed with TypeScript.
It exports the types Handler, UnknownHandler, InvalidHandler, and
Options.
Compatibility
This package is at least compatible with all maintained versions of Node.js. As of now, that is Node.js 14.14+ and 16.0+. It also works in Deno and modern browsers.
Related
mapz— functional map
Contribute
Yes please! See How to Contribute to Open Source.
Security
This package is safe.