jcoreio / map-shape

apply mapping functions to specific properties of an object

map-shape

One of those missing lodash functions. Includes TypeScript definitions and Flow definitions (they aren't prefect, there are some edge cases...)

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.

import mapShape from 'map-shape/fp'

mapShape({
  foo: String,
  bar: parseInt,
})({
  foo: 1,
  bar: '2',
  baz: 'hello',
})
// outputs { foo: '1', bar: 2 }

map-shape's Issues

Convert Project to TypeScript