This is a collection of help pages covering various use cases for regular expressions - from basic syntax to advanced extraction and formatting techniques.

✨Basics of Regular Expressions

✍️ How to write regular expressions

📝 Regular expressions related to line breaks

✍️ How to write regular expressions
💬 How to send text retrieved by comma separation with line breaks in Chatwork/Slack

Regular Expressions for Modifying Specific Strings (Phone Numbers, Postal Codes, etc.)

📱Insert a hyphen into a mobile phone number
☝️Insert a comma into a number
🏡 Add a hyphen to a postal code without one

Regular Expressions for Strings Containing Whitespace

Remove only whitespace

Regular Expressions for Extracting Specific Data

📋 Retrieve a specific string after a line break
📆 Retrieve part of a date (compatible with various formats)
⏰ Extract only the time (minutes: seconds) from a timestamp
🔢 Extract numbers from postal codes, phone numbers, and amounts
📄 Retrieve everything from a specific string to the end of the text (including line breaks)
🏠 Separate and retrieve "postal code" and "address" from an address field
☎️ Split the area code from a hyphen-delimited phone number
➖ Exclude the leading zero from a string
✂️ Extract a specific number of characters from the beginning or end of a string
🗓️ Convert a retrieved date to a year and month (yyyyMM)
🔢 Retrieve from the Nth character to the end of a string
🗂️ Remove an extension from a file name

Regular Expressions for Converting Date, Time, and Format

🔄 Convert the date/time format all at once

Search Keywords

Regular expressions, configuration method, date, numbers, extraction, replacement, formatting