prefer_foreach
Use 'forEach' and a tear-off rather than a 'for' loop to apply a function to every element.
Description
#The analyzer produces this diagnostic when a for
loop is used to operate on every member of a collection and the method forEach
could be used instead.
Example
#The following code produces this diagnostic because a for
loop is being used to invoke a single function for each key in m
:
void f(Map<String, int> m) {
for (final key in m.keys) {
print(key);
}
}
Common fixes
#Replace the for loop with an invocation of forEach
:
void f(Map<String, int> m) {
m.keys.forEach(print);
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.