<h1 id="heading-retainwhere">retainWhere():</h1>
<ul>
<li>Removes all objects from this list that fail to satisfy <code>test</code>.
</li>
<li>An object <code>o</code> satisfies <code>test</code> if <code>test(o)</code> is true.
</li>
<li>This function takes <code>element</code> as a parameter and removes the rest of the items that do not specify the condition.
</li>
</ul>
<h1 id="heading-example">Example:</h1>
<pre><code class="lang-dart">void main() {
 List&lt;int&gt; numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

 // Remove all odd numbers from the list
 numbers.retainWhere((number) =&gt; number.isEven);

 print(numbers); // Output: [2, 4, 6, 8, 10]
}
</code></pre>
<pre><code class="lang-dart">[2, 4, 6, 8, 10]

Exited.
</code></pre>

# retainWhere():

* Removes all objects from this list that fail to satisfy `test`.
 
* An object `o` satisfies `test` if `test(o)` is true.
 
* This function takes `element` as a parameter and removes the rest of the items that do not specify the condition.
 

# Example:

```dart
void main() {
 List<int> numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

 // Remove all odd numbers from the list
 numbers.retainWhere((number) => number.isEven);

 print(numbers); // Output: [2, 4, 6, 8, 10]
}
```

```dart
[2, 4, 6, 8, 10]

Exited.
```

Dart Iterable retainWhere():

retainWhere():

Example: