Dart Runes followedBy()
Syntax & Examples

Runes.followedBy() method

The `followedBy` method in Dart returns the lazy concatenation of this iterable and another iterable.

Syntax of Runes.followedBy()

The syntax of Runes.followedBy() method is:

 Iterable<int> followedBy(Iterable<int> other)

This followedBy() method of Runes returns the lazy concatentation of this iterable and other.

Parameters

ParameterOptional/RequiredDescription
otherrequiredAnother iterable to concatenate with this iterable.

Return Type

Runes.followedBy() returns value of type Iterable<int>.


✐ Examples

1 Concatenate two sequences of characters

In this example,

  1. We create two sequences of Unicode code points, first and second, from the strings 'Hello' and ' World' respectively.
  2. We use the followedBy method to concatenate the two sequences.
  3. We then print the combined sequence to standard output.

Dart Program

void main() {
  Runes first = Runes('Hello');
  Runes second = Runes(' World');
  Iterable<int> combined = first.followedBy(second);
  print('Combined sequence: $combined');
}

Output

Combined sequence: (72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100)

2 Concatenate sequence of numbers with a list of numbers

In this example,

  1. We create a sequence of Unicode code points numbers from the string '12345'.
  2. We create a list moreNumbers containing numbers 6 to 10.
  3. We use the followedBy method to concatenate the sequence with the list.
  4. We then print the combined sequence to standard output.

Dart Program

void main() {
  Runes numbers = Runes('12345');
  List<int> moreNumbers = [6, 7, 8, 9, 10];
  Iterable<int> combined = numbers.followedBy(moreNumbers);
  print('Combined sequence: $combined');
}

Output

Combined sequence: (49, 50, 51, 52, 53, 6, 7, 8, 9, 10)

Summary

In this Dart tutorial, we learned about followedBy() method of Runes: the syntax and few working examples with output and detailed explanation for each example.