show some code examples of how to filter out null values from an array in javascript in javascript

To filter out null values from an array in JavaScript, you can use the filter() method. Here's an example:

index.tsx
const arr = ['a', null, 'b', null, 'c'];

const filteredArr = arr.filter((value) => {
  return value !== null;
});

console.log(filteredArr); // Output: ['a', 'b', 'c']
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In this example, we create an array arr that contains some values, including some null values. We then use the filter() method to create a new array filteredArr that only contains the non-null values from arr. The filter() method takes a callback function as an argument, which is called for each element in the array. The callback function should return true or false depending on whether the element should be included in the filtered array. In this case, we check if the element is not equal to null, and return true if it is not. The filter() method returns a new array containing only the elements for which the callback function returned true. Finally, we log the filtered array to the console.