Take方法有什么用?飞镖和飞镖
What is the use of Take method ? Flutter & dart
拿-->有什么作用(flutter和Dart)
class Ticker {
Stream<int> tick({int ticks}) => Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
}).take(ticks);
}
很简单,它只是将项目作为您从流中传递(滴答参数)的计数。
// This stream is responsible to do a task for each second
Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
})
// With take, stream does it's job only `ticks` times
Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
}).take(ticks);
拿-->有什么作用(flutter和Dart)
class Ticker {
Stream<int> tick({int ticks}) => Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
}).take(ticks);
}
很简单,它只是将项目作为您从流中传递(滴答参数)的计数。
// This stream is responsible to do a task for each second
Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
})
// With take, stream does it's job only `ticks` times
Stream.periodic(Duration(seconds: 1), (x) {
return ticks - x - 1;
}).take(ticks);