75defbcb559448365a2de9f544bc9cecd8393f4a.svn-base
645 Bytes
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
/**
Convert a value to an array.
_Supplying `null` or `undefined` results in an empty array._
@example
```
import arrify = require('arrify');
arrify('🦄');
//=> ['🦄']
arrify(['🦄']);
//=> ['🦄']
arrify(new Set(['🦄']));
//=> ['🦄']
arrify(null);
//=> []
arrify(undefined);
//=> []
```
*/
declare function arrify<ValueType>(
value: ValueType
): ValueType extends (null | undefined)
? []
: ValueType extends string
? [string]
: ValueType extends ReadonlyArray<unknown> // TODO: Use 'readonly unknown[]' in the next major version
? ValueType
: ValueType extends Iterable<infer T>
? T[]
: [ValueType];
export = arrify;