15 lines
642 B
JavaScript
15 lines
642 B
JavaScript
|
import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
|
||
|
|
import { filter } from './filter';
|
||
|
|
import { throwIfEmpty } from './throwIfEmpty';
|
||
|
|
import { defaultIfEmpty } from './defaultIfEmpty';
|
||
|
|
import { take } from './take';
|
||
|
|
export function elementAt(index, defaultValue) {
|
||
|
|
if (index < 0) {
|
||
|
|
throw new ArgumentOutOfRangeError();
|
||
|
|
}
|
||
|
|
const hasDefaultValue = arguments.length >= 2;
|
||
|
|
return (source) => source.pipe(filter((v, i) => i === index), take(1), hasDefaultValue
|
||
|
|
? defaultIfEmpty(defaultValue)
|
||
|
|
: throwIfEmpty(() => new ArgumentOutOfRangeError()));
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=elementAt.js.map
|