https://github.com/jcoreio/map-shape

apply mapping functions to specific properties of an object
https://github.com/jcoreio/map-shape

convert functional-programming map restructuring

Last synced: 7 months ago
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apply mapping functions to specific properties of an object

• Host: GitHub
• URL: https://github.com/jcoreio/map-shape
• Owner: jcoreio
• License: mit
• Created: 2020-02-18T07:08:43.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2023-01-05T07:35:12.000Z (about 3 years ago)
• Last Synced: 2025-03-01T17:49:07.286Z (about 1 year ago)
• Topics: convert, functional-programming, map, restructuring
• Language: TypeScript
• Size: 3.3 MB
• Stars: 0
• Watchers: 4
• Forks: 0
• Open Issues: 21
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

          
# map-shape

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One of those missing lodash functions. Includes TypeScript definitions and Flow definitions

(they aren't prefect, there are some edge cases...)

```js

import mapShape from 'map-shape'

mapShape(

  {

    foo: 1,

    bar: '2',

    baz: 'hello',

  },

  {

    foo: (value, key, obj) => `${value} ${key} ${obj.baz}`,

    bar: value => parseInt(value),

  }

)

// outputs { foo: '1 foo hello', bar: 2 }

```

Each mapper function is called with three arguments:

- `value` - the value of the input property

- `key` - the key of the input property

- `obj` - the input object

### Notes

If the input object is `null`, returns `null`. If the input object is `undefined`, returns `undefined`.

## FP Version

Works better with `lodash/fp`. Only passes the `value` to each mapper function.

```js

import mapShape from 'map-shape/fp'

mapShape({

  foo: String,

  bar: parseInt,

})({

  foo: 1,

  bar: '2',

  baz: 'hello',

})

// outputs { foo: '1', bar: 2 }

```