正则表达式修改需求：仅捕获[a-zA-Z]匹配内容

Hey there! Let's tweak your regex so it only captures the word after "I'm" or "I am", and fix a couple of small oversights in the original pattern.

Updated Regex #

/(?:i'm|i am) ([a-zA-Z]+)/i

Breakdown of the Changes: #

• (?:i'm|i am): This is a non-capturing group (?: tells the regex engine not to save this prefix as a capture group). It matches either "I'm" or "I am" without cluttering your final result with these phrases.
• ([a-zA-Z]+): This is the capturing group you care about. The + ensures it matches one or more letters—fixing the original issue where [a-zA-Z] only grabbed a single character (so it would have pulled just "s" from "sam" instead of the full word).
• /i: The case-insensitive modifier stays, so it works seamlessly with inputs like "I'm Sam", "I AM GOOD", etc.

Test Case Results: #

• Input: "I'm sam" → Capture group 1 returns "sam"
• Input: "I am good at this" → Capture group 1 returns "good"

Optional Optimizations #

If you need to handle edge cases like names with hyphens or apostrophes (e.g., "O'Neil", "Mary-Ann"), expand the character set to include those valid characters:

/(?:i'm|i am) ([a-zA-Z'-]+)/i

This will correctly capture words like "O'Neil" instead of stopping at the apostrophe.

内容的提问来源于stack exchange，提问作者Ben Rivers