Understanding how to accurately deduce types in the Ramda pipe function is essential

When attempting to utilize ramda for extracting data[].data.tags, I encountered a type error in TypeScript

  R.pipe(
    R.map(R.prop('data')),
    R.map(R.prop('tags'))  // typescript error
  )([{data: {tags: ['t1', 't2'], title: ''}, meta: null}])

I believe I need to specify types in R.pipe, however, I prefer TypeScript to automatically infer these types

The dependencies I am using are:

    "@types/ramda": "^0.27.60",
    "typescript": "4.5.4",
    "ramda": "^0.27.1",

Here is my tsconfig.js configuration:

{
  "compilerOptions": {
    "target": "es5",
    "lib": ["dom", "dom.iterable", "esnext"],
    "allowJs": true,
    "skipLibCheck": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noEmit": true,
    "esModuleInterop": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "jsx": "preserve",
    "incremental": true
  },
  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
  "exclude": ["node_modules"]
}

Any suggestions or advice would be greatly appreciated

Answer №1

Discovering the similarities between fp-ts-std and Ramda's functional programming tools for TypeScript was a pleasant surprise. The library offers all the same functionalities, but with the added benefits of currying and type safety. It does place a strong emphasis on Algebraic Data Types (ADT).

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