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(0+1)*1(0+1)* Regex

3 min read Jul 03, 2024
(0+1)*1(0+1)* Regex

Regex Pattern: (0+1)1(0+1)

The regex pattern (0+1)*1(0+1)* is a complex pattern that matches a specific sequence of characters. Let's break it down to understand what it matches.

Pattern Breakdown

The pattern consists of three main parts:

(0+1)*

This part of the pattern matches any sequence of 0s and 1s, including an empty string. The * quantifier allows the pattern to match zero or more occurrences of the preceding pattern (0+1). The (0+1) part matches any single character that is either 0 or 1.

1

This part of the pattern matches a single character, which is 1.

(0+1)*

This part of the pattern is the same as the first part, matching any sequence of 0s and 1s, including an empty string.

Match Examples

Here are some examples of strings that match the regex pattern (0+1)*1(0+1)*:

  • 111
  • 0101
  • 10101
  • 1
  • 011011

And here are some examples of strings that do not match:

  • 000
  • 1010
  • 1100

Use Cases

This regex pattern can be useful in various scenarios, such as:

  • Validating binary numbers that contain at least one 1
  • Matching strings that contain a specific sequence of 0s and 1s
  • Extracting substrings that start and end with 1s

Conclusion

The regex pattern (0+1)*1(0+1)* is a powerful tool for matching specific sequences of characters. By understanding how it works, you can use it to solve a wide range of problems and validate complex patterns in your data.

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