Regex Challenge: Extra Space Detector

Extra Space Detector

Write a regex intended for use with .replace() to detect runs of two or more consecutive spaces in a string, so they could be collapsed down to a single space.

Your pattern

Sample text

'hello world' / 'hello world' / 'a b' / 'single space here' / ' leading'

Test cases

hello worldexpect match
hello worldexpect no match
a bexpect match
single space hereexpect no match
leadingexpect match
notrailing expect match

How to Solve this Regex Challenge

To complete the Extra Space Detector challenge, you must write a regular expression pattern that satisfies all specified test cases.

Steps to Complete:

Analyze the Requirements: Read the description and review the list of test cases below. Identify which strings must be matched (green markers) and which must be rejected (red markers).
Draft Your Pattern: Enter your regex in the interactive editor. Use the provided Hint button if you get stuck.
Verify: The test cases panel will update in real-time as you type, showing which strings match your current expression.
Review the Solution: Once you successfully pass all test cases, review the explanation to understand the logic behind the solution.