Category Archives: Strings

A regular expression to match and validate if the first letter of a string is uppercase.

/^[A-Z][a-z0-9_-]{3,19}$/

A regular expression to match all uppercase letters in text.

/[A-Z\s]+/

A regular expression to validate an ISO 8601 date string.

/^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d(\.\d+)?(([+-]\d\d:\d\d)|Z)?$/i

A Regular Expression to match and valid date of birth (dd/mm/yyyy).

/^(?:0[1-9]|[12]\d|3[01])([\/.-])(?:0[1-9]|1[012])\1(?:19|20)\d\d$/

A regular expression to match a new line (linebreaks).

/[\r\n]+/

A regular expression to parse and match Java packages names.

/^([a-zA-Z_]\w*)+([.][a-zA-Z_]\w*)+$/

A regular expression to match hashtags (#) used in social media platforms.

/^#[^ [email protected]#$%^&*(),.?":{}|<>]*$/

A regular expression that matches emojis.

/(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])/

A regular expression to parse and validate Latitude and Longitude values.

/^((\-?|\+?)?\d+(\.\d+)?),\s*((\-?|\+?)?\d+(\.\d+)?)$/

A regular expression to parse and validate MAC (media access control address) address.

/^((([a-f0-9]{2}:){5})|(([a-f0-9]{2}-){5}))[a-f0-9]{2}$/i