blob: 62eea022685e18c0d98238de540bef94891a0854 (
plain)
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
|
'use strict';
const {
SymbolAsyncIterator,
SymbolIterator,
} = primordials;
function isReadable(obj) {
return !!(obj && typeof obj.pipe === 'function' &&
typeof obj.on === 'function');
}
function isWritable(obj) {
return !!(obj && typeof obj.write === 'function' &&
typeof obj.on === 'function');
}
function isStream(obj) {
return isReadable(obj) || isWritable(obj);
}
function isIterable(obj, isAsync) {
if (obj == null) return false;
if (isAsync === true) return typeof obj[SymbolAsyncIterator] === 'function';
if (isAsync === false) return typeof obj[SymbolIterator] === 'function';
return typeof obj[SymbolAsyncIterator] === 'function' ||
typeof obj[SymbolIterator] === 'function';
}
module.exports = {
isIterable,
isReadable,
isStream,
};
|
