no-partial-of-curried.md

No use of _.partial on curried Lodash methods

Using _.partial or _.partialRight on Lodash methods that are curried can lead to some odd behaviors. Most lodash/fp are curried by default.

const fn = _.partial(_.get, ['path']);
// => Equivalent to `_.get('path')`
const fn = _.partial(_.get, [_, object]);
// => Equivalent to `_.get(_, object)`
const fn = _.partial(_.get, ['path', object]);
// => This will create a function that when called with no arguments, will simply return the function again.
// Which is probably not the expected behavior

Rule Details

Fail

_.partial(_.get, ['path']);

_.partial(_.find, [{foo: 'bar'}]);

_.partial(_.find, [_, {this: 'is', an: 'object'}]);

Pass

_.partial((a, b) => a + b, [2]);

// This is okay because `_.flow` is not curried
_.partial(_.flow, [
  a => a + 1,
  b => b * 10
])(c => c - 1);