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
|
function pick <O extends object, K extends keyof O> (object: O, keys: K[]): Pick<O, K> {
const result: any = {}
for (const key of keys) {
if (Object.prototype.hasOwnProperty.call(object, key)) {
result[key] = object[key]
}
}
return result
}
function omit <O extends object, K extends keyof O> (object: O, keys: K[]): Exclude<O, K> {
const result: any = {}
const keysSet = new Set(keys) as Set<string>
for (const [ key, value ] of Object.entries(object)) {
if (keysSet.has(key)) continue
result[key] = value
}
return result
}
function getKeys <O extends object, K extends keyof O> (object: O, keys: K[]): K[] {
return (Object.keys(object) as K[]).filter(k => keys.includes(k))
}
function sortObjectComparator (key: string, order: 'asc' | 'desc') {
return (a: any, b: any) => {
if (a[key] < b[key]) {
return order === 'asc' ? -1 : 1
}
if (a[key] > b[key]) {
return order === 'asc' ? 1 : -1
}
return 0
}
}
function shallowCopy <T> (o: T): T {
return Object.assign(Object.create(Object.getPrototypeOf(o)), o)
}
export {
pick,
omit,
getKeys,
shallowCopy,
sortObjectComparator
}
|
