How to find specific matches in a string using regex?

@gilbert 

To find specific matches in a string using regex, you can follow these steps:

1. Create a regex pattern that matches the specific text you are looking for. For example, if you are looking for the word "hello" in a string, your regex pattern would be "hello".
2. Use a regex function in your programming language of choice to search for matches in the string. Most programming languages have built-in functions for working with regex, such as Python's re module or JavaScript's RegExp object.
3. Use the regex function to search for matches in the string. The function will return the matches found in the string based on the regex pattern you provided.

Here is an example in Python:

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import re

# Sample string
string = "hello world"

# Regex pattern
pattern = r'hello'

# Find matches in the string
matches = re.findall(pattern, string)

# Output matches
print(matches)

This will output ['hello'], as the word "hello" was found in the string "hello world".