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Added version note about wildcard variables language feature of Dart 3.7 #6432

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merged 4 commits into from
Feb 21, 2025
Merged

Added version note about wildcard variables language feature of Dart 3.7 #6432

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5cf236c
Add version note about _ no longer creating variable
ViktorVoloshko Feb 18, 2025
979deb5
Fixed line lenght
ViktorVoloshko Feb 18, 2025
5e07f1c
Minor updates
MaryaBelanger Feb 21, 2025
a75b9fb
Merge branch 'main' into patch-1
MaryaBelanger Feb 21, 2025
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12 changes: 12 additions & 0 deletions src/content/effective-dart/style.md
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Expand Up @@ -301,6 +301,18 @@ In contrast, top-level functions and method declarations don't have that context
so their parameters must be named so that it's clear what each parameter is for,
even if it isn't used.

:::version-note
Since Dart 3.7, the [wildcard variable `_`][] no longer creates a variable, so you can
use `_` for multiple parameters simultaneously without name collision:

```dart tag=good
(_, _) {
print('error');
}
```
:::

[wildcard variable `_`]: /language/variables#wildcard-variables

### DON'T use a leading underscore for identifiers that aren't private

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