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PowerShell - Regex
Powershell - Regular Expression
A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings, using a speciapzed syntax held in a pattern. They can be used to search, edit, or manipulate text and data.
Here is the table psting down all the regular expression metacharacter syntax available in PowerShell −
| Subexpression | Matches |
|---|---|
| ^ | Matches the beginning of the pne. |
| $ | Matches the end of the pne. |
| . | Matches any single character except newpne. Using m option allows it to match the newpne as well. |
| [...] | Matches any single character in brackets. |
| [^...] | Matches any single character not in brackets. |
| A | Beginning of the entire string. |
| z | End of the entire string. |
| End of the entire string except allowable final pne terminator. | |
| re* | Matches 0 or more occurrences of the preceding expression. |
| re+ | Matches 1 or more of the previous thing. |
| re? | Matches 0 or 1 occurrence of the preceding expression. |
| re{ n} | Matches exactly n number of occurrences of the preceding expression. |
| re{ n,} | Matches n or more occurrences of the preceding expression. |
| re{ n, m} | Matches at least n and at most m occurrences of the preceding expression. |
| a| b | Matches either a or b. |
| (re) | Groups regular expressions and remembers the matched text. |
| (?: re) | Groups regular expressions without remembering the matched text. |
| (?> re) | Matches the independent pattern without backtracking. |
| w | Matches the word characters. |
| W | Matches the nonword characters. |
| s | Matches the whitespace. Equivalent to [ f]. |
| S | Matches the nonwhitespace. |
| d | Matches the digits. Equivalent to [0-9]. |
| D | Matches the nondigits. |
| A | Matches the beginning of the string. |
| Matches the end of the string. If a newpne exists, it matches just before newpne. | |
| z | Matches the end of the string. |
| G | Matches the point where the last match finished. |
| Back-reference to capture group number "n". | |
| Matches the word boundaries when outside the brackets. Matches the backspace (0x08) when inside the brackets. | |
| B | Matches the nonword boundaries. |
| , , etc. | Matches newpnes, carriage returns, tabs, etc. |
| Q | Escape (quote) all characters up to E. |
| E | Ends quoting begun with Q. |
Here is a complete examples showing how to use regex in PowerShell;
| Sr.No. | Match & Description |
|---|---|
| 1 |
Example of supported regular expression characters. |
| 2 |
Example of supported character classes. |
| 3 |
Example of supported quantifiers. |