Anchors
Anchors are an aspect of a regular expression which specifies a position in a string where a match must occur. An anchor that is used in a regular expression will not advance through the string or consume characters. Instead, it looks for a match in the specified position only. For example, ^ specifies that the match must start at the beginning of a line or string. Common anchors include:
| ^ | Start of a line |
| \A | Start of an input string |
| $ | End of a line |
| \Z | End of an input string |
Additional Resources