Regular Expression

Match decimal value

/\d+(\.\d+)?/

• \d+ - match 1 or more digits
• (\.\d+) - make a group of matches, match a . (dot) followed by 1 or more digits
• ? - optional to match for the preceding token

Reference:

• Decimal number regular expression, where digit after decimal is optional

---

Match OR exact value

Let’s say want to match monthly or daily

/\bmonthly\b|\bdaily\b/

Wrap the word with \b, means the word has no other character in front or behind.

What if without \b? then it will matches

• monthly
• daily
• foomonthly
• monthlybar
• foodaily
• dailybar

Reference:

• Alternation with The Vertical Bar or Pipe Symbol