prefer_foreach.md

Pattern: Missing use of forEach

Issue: -

Description

Using forEach when you are only going to apply a function or method to all elements of an iterable is a good practice because it makes your code more terse.

Example of incorrect code:

for (final key in map.keys.toList()) {
 map.remove(key);
}

Example of correct code:

map.keys.toList().forEach(map.remove);

NOTE: Replacing a for each statement with a forEach call may change the behavior in the case where there are side-effects on the iterable itself.

for (final v in myList) {
 foo().f(v); // This code invokes foo() many times.
}

myList.forEach(foo().f); // But this one invokes foo() just once.

Further Reading

• Linter for Dart - prefer_foreach