How to remove all elements of an array in Swift
Overview
We can remove all elements of an array that satisfy a given predicate in Swift by using the removeAll(where:) method.
Syntax
arr.removeAll(where:)
Parameters
where:: This is a criteria, condition, or predicate. Once this is met, the element is removed.
Return value
The value returned is an array with the elements that meet the criteria to be removed.
Code example
// create arraysvar languages = ["Java", "Python", "Ruby", "Perl", "Swift"]var numbers = [1, 2, 3, 4]// remove based on criterialanguages.removeAll {$0.count > 4}// remove strings whose length// is greater than 4numbers.removeAll{$0 % 2 != 0}// remove numbers that// are not even numbers// print modified arraysprint(languages)print(numbers)
Explanation
- Lines 2 and 3: We create the arrays
languagesandnumbers. - Line 6: We remove string elements with a length greater than 4 from the array
languages. - Line 10: We remove elements that are not even numbers from the array
numbers. - Lines 15 and 16: We print the results to the console.
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