1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
import { partial } from './partial.js'import { type } from './type.js'
const greet = (  salutation, title, firstName, lastName) =>  [salutation, title, firstName, lastName]
test('happy', () => {  const canPassAnyNumberOfArguments = partial(    greet, 'Hello', 'Ms.'  )  const fn = canPassAnyNumberOfArguments('foo')  const sayHello = partial(greet, [ 'Hello' ])  const sayHelloRamda = partial(sayHello, [ 'Ms.' ])
  expect(type(fn)).toBe('Function')
  expect(fn('bar')).toStrictEqual(['Hello', 'Ms.', 'foo', 'bar'])  expect(sayHelloRamda('foo', 'bar')).toStrictEqual(['Hello', 'Ms.', 'foo', 'bar'])})
test('extra arguments are ignored', () => {  const canPassAnyNumberOfArguments = partial(    greet, 'Hello', 'Ms.'  )  const fn = canPassAnyNumberOfArguments('foo')
  expect(type(fn)).toBe('Function')
  expect(fn(    'bar', 1, 2  )).toStrictEqual(['Hello', 'Ms.', 'foo', 'bar'])})
test('when array is input', () => {  const fooFn = (    a, b, c, d  ) => ({    a,    b,    c,    d,  })  const barFn = partial(    fooFn, [ 1, 2 ], []  )
  expect(barFn(1, 2)).toEqual({    a : [ 1, 2 ],    b : [],    c : 1,    d : 2,  })})
test('ramda spec', () => {  const sayHello = partial(greet, 'Hello')  const sayHelloToMs = partial(sayHello, 'Ms.')
  expect(sayHelloToMs('Jane', 'Jones')).toStrictEqual(['Hello', 'Ms.', 'Jane', 'Jones'])})