{"id":8414,"date":"2023-12-19T00:08:32","date_gmt":"2023-12-19T00:08:32","guid":{"rendered":"https:\/\/cheapwindowsvps.com\/blog\/mastering-notepad-exploring-search-replace-functions-with-regex-and-plugins\/"},"modified":"2025-01-20T10:33:46","modified_gmt":"2025-01-20T10:33:46","slug":"mastering-notepad-exploring-search-replace-functions-with-regex-and-plugins","status":"publish","type":"post","link":"https:\/\/cheapwindowsvps.com\/blog\/mastering-notepad-exploring-search-replace-functions-with-regex-and-plugins\/","title":{"rendered":"Mastering Notepad++: Exploring Search, Replace Functions with Regex and Plugins"},"content":{"rendered":"

The free and widely-used editor for Windows supports not only basic search and replace functions but also regular expressions. A helpful plugin assists in formulating regex, providing real-time expression validation. However, for many tasks you don’t need regex; built-in functions and plugins often offer simpler solutions.<\/div>\n<\/p>\n

The raw output of scripts is often extensive and requires some post-processing to eliminate unwanted or superfluous strings. In some cases, this is not enough; a proper transformation is required, for example through sorting or conversion.<\/p>\n<\/p>\n

If this is not a frequently recurring task, it is easier to use an editor instead of developing a script for this purpose.<\/p>\n<\/p>\n

Regex Trainer<\/h2>\n<\/p>\n

Searching and replacing constant character strings quickly comes up against its limits. For this reason, all advanced editors also support regular expressions, including Notepad++.<\/p>\n

If you open the dialog for Find and Replace with CTRL + H, you can select the desired search mode, including regular expressions.<\/p>\n

Find and replace dialog in Notepad<\/a> <\/p>\n

Even though Notepad++ closely resembles the popular Perl regex implementation, formulating expressions often requires support, especially for those who do not work regularly with regex.<\/p>\n<\/p>\n

For this purpose, the Regex Trainer<\/em> plugin comes in handy. It can be easily installed via the Plugin Manager and then opened in a separate panel.<\/p>\n<\/p>\n

In this panel, the tool checks the input of a regular expression in real-time and highlights syntax errors. Furthermore, it includes a Quick Reference where you can look up regex rules.<\/p>\n<\/p>\n

Regex Trainer checks regular expressions in real-time upon input.<\/a><\/p>\n

The colour coding of the matches for the regex in the text is particularly useful. It also highlights groups, i.e. the areas in brackets that you can refer to with $1, $2, etc. in the replacement expressions.<\/p>\n<\/p>\n

Colour highlighting of regex matches and groups<\/a><\/div>\n<\/p>\n

However, the coloring only works if syntax highlighting for specific file types is not active. If necessary, you can deactivate it using the None (Normal Text)<\/em> option in the Language<\/em> menu.<\/p>\n<\/p>\n

The plugin also offers the option to save used expressions along with a description so that they can be reused later.<\/p>\n<\/p>\n

Integrated functions for text replacement<\/h2>\n<\/p>\n

In numerous circumstances, there is not always a necessity to make the effort of composing a regular expression for the replacement of text. Notepad++ encompasses several functions designed for standard situations.<\/p>\n<\/p>\n

These incorporate commands for erasing lines, which is tantamount to replacing them with the empty string. These commands can be located in the menu under Edit => Line Operations<\/em>:<\/p>\n<\/p>\n