Add `mergeFlipped`

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評估

難度
2/5
預估耗時
1-3 小時
新手友好度
35/100
Issue 類型
功能
描述清晰度
基本清楚
活躍度
停滯
領域
backend

研究方向

The issue proposes mergeFlipped and the // operator for purescript-record, with examples but no source files or tests named. Start by reading the linked PR #83 and the package’s existing record merge implementation and tests. Done means the proposed operation and operator work for the shown record combinations and are covered by tests.

由索引模型根據 Issue 內容生成。

描述

Add mergeFlipped and an infix operator //

As a user I'm typically more thinking in terms of mergeFlipped than merge, as I want to overwrite a record with some new fields. E.g. in Typescript I can do

const newRecord = { ...otherRecord, more: 23 }

and in dhall // is avaiable as a mergeFlipped operator:

{ home       = "/home/bill"
, privateKey = "/home/bill/.ssh/id_ed25519"
, publicKey  = "/home/blil/.ssh/id_ed25519.pub"
} // { home = "/home/john" }

So in Purescript I would also like to do the following and I think it makes for a nice addition to purescript-record:

person :: { age :: Int
, firstName :: Maybe String
, professional :: String
}
person = 
  { firstName: "John", professional: true } //
  { professional: "Software Engineer", age: 58 } // 
  { firstName: Just "Mike" }

I have created a PR to illustrate this #83

主要語言
PureScript
星號
68
分支
33
平均合併
2 天 23 小時
30 天內合併 PR
1

環境準備

  • 沒有 Dockerfile 或 Docker Compose 檔案
  • 有 Pull Request 範本
  • 沒有貢獻指南

從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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