Dart Runes every()
Syntax & Examples

Runes.every() method

The `every` method in Dart checks whether every element of this iterable satisfies a given test function.

Syntax of Runes.every()

The syntax of Runes.every() method is:

 bool every(bool test(int element))

This every() method of Runes checks whether every element of this iterable satisfies test.

Parameters

ParameterOptional/RequiredDescription
testrequiredA function that takes an integer element as input and returns a boolean value indicating whether the element satisfies the test.

Return Type

Runes.every() returns value of type bool.


✐ Examples

1 Check for all lowercase characters

In this example,

  1. We create a sequence of Unicode code points runes from the string 'Hello'.
  2. We use the every method with a test function to check if all characters are lowercase.
  3. We then print the result to standard output.

Dart Program

void main() {
  Runes runes = Runes('Hello');
  bool allLowerCase = runes.every((element) => element >= 97 && element <= 122);
  print('Are all characters lowercase? $allLowerCase');
}

Output

Are all characters lowercase? false

2 Check for all digit characters

In this example,

  1. We create a sequence of Unicode code points numbers from the string '12345'.
  2. We use the every method with a test function to check if all elements are digit characters.
  3. We then print the result to standard output.

Dart Program

void main() {
  Runes numbers = Runes('12345');
  bool allDigits = numbers.every((element) => element >= 48 && element <= 57);
  print('Are all elements digits? $allDigits');
}

Output

Are all elements digits? true

Summary

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