List Filtering

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DESCRIPTION

In this kata you will create a function that takes a list of non-negative integers and strings and returns a new list with the strings filtered out.

Example

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filter_list([1, 2, "a", "b"]) == [1, 2];
filter_list([1, "a", "b", 0, 15]) == [1, 0, 15];
filter_list([1, 2, "aasf", "1", "123", 123]) == [1, 2, 123];

SOLUTION

  • 数组的 filter() 方法
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function filter_list(l) {
  // Return a new array with the strings filtered out
  return l.filter((word) => typeof word === "number");
}

Reference

List Filtering