/TypeScript/Check type of object typescript

Check type of object typescript

function isFish(pet: Fish | Bird): pet is Fish {
   return (<Fish>pet).swim !== undefined;
}

// Both calls to 'swim' and 'fly' are now okay.
if (isFish(pet)) {
  pet.swim();
}
else {
  pet.fly();
}

Source: stackoverflow.com

Similar codes

14 votes140 views2 answers
Upgrade to typescript in react js
TypeScript
0 vote143 views1 answer
Django model get all documents with a given foreign key
TypeScript
0 vote127 views1 answer
Git show which commit a tag points to
TypeScript
1 vote138 views1 answer
Property 'unsubscribe' does not exist on type 'Observable<Object>'
TypeScript
0 vote140 views1 answer
Get elements in list in another list c#
TypeScript
0 vote118 views1 answer
Angular firestore timestamp date pipe
TypeScript
0 vote137 views1 answer
How can I call a method every x seconds?
TypeScript
0 vote151 views1 answer
Text size in plots in r
TypeScript
0 vote140 views1 answer
Disable pdf download button in iframe in angular 10
TypeScript
0 vote138 views1 answer
Detach process from its terminal
TypeScript