| /** PURE_IMPORTS_START _util_EmptyError,_filter,_take,_defaultIfEmpty,_throwIfEmpty,_util_identity PURE_IMPORTS_END */ |
| import { EmptyError } from '../util/EmptyError'; |
| import { filter } from './filter'; |
| import { take } from './take'; |
| import { defaultIfEmpty } from './defaultIfEmpty'; |
| import { throwIfEmpty } from './throwIfEmpty'; |
| import { identity } from '../util/identity'; |
| export function first(predicate, defaultValue) { |
| var hasDefaultValue = arguments.length >= 2; |
| return function (source) { return source.pipe(predicate ? filter(function (v, i) { return predicate(v, i, source); }) : identity, take(1), hasDefaultValue ? defaultIfEmpty(defaultValue) : throwIfEmpty(function () { return new EmptyError(); })); }; |
| } |
| //# sourceMappingURL=first.js.map |
