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Struct

Instances​

Utilities​

Instances​

getAssignSemigroup​

Return a semigroup which works like Object.assign.

Signature​

export declare const getAssignSemigroup: <A extends object = never>() => Semigroup<A>

Details​

  • Added in 0.1.0

Example​

import { getAssignSemigroup } from '@fp-tx/core/struct'

interface Person {
  readonly name: string
  readonly age: number
}

const S = getAssignSemigroup<Person>()
assert.deepStrictEqual(S.concat({ name: 'name', age: 23 }, { name: 'name', age: 24 }), { name: 'name', age: 24 })

License​

  • MIT – Copyright (c) 2017-present Giulio Canti

Utilities​

evolve​

Creates a new object by recursively evolving a shallow copy of a, according to the transformation functions.

Signature​

export declare const evolve: <A, F extends { [K in keyof A]: (a: A[K]) => unknown }>(
  transformations: F,
) => (a: A) => { [K_1 in keyof F]: ReturnType<F[K_1]> }

Details​

  • Added in 0.1.0

Example​

import { pipe } from '@fp-tx/core/function'
import { evolve } from '@fp-tx/core/struct'

assert.deepStrictEqual(
  pipe(
    { a: 'a', b: 1 },
    evolve({
      a: a => a.length,
      b: b => b * 2,
    }),
  ),
  { a: 1, b: 2 },
)

License​

  • MIT – Copyright (c) 2017-present Giulio Canti