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This article mainly introduces how to use regular expressions in VBS. The introduction in this article is very detailed and has certain reference value. Interested friends must read it!

use regular expressions

In a typical search and replace operation, you must provide the exact text you are looking for. This technique may be adequate for simple search and replacement tasks in static text, but because of its lack of flexibility, searching dynamic text is difficult or even impossible.

Using regular expressions, you can:

Test a pattern in a string. For example, an input string can be tested to see if there is a phone number pattern or a credit card number pattern in the string. This is called data validation.

Replace text. You can use a regular expression in your document to identify specific words, and then delete them all or replace them with something else.

Extract a substring from a string based on pattern matching. Can be used to find specific words in text or input fields.

For example, if you need to search an entire web site to remove some obsolete material and replace some HTML formatting tags, you can use regular expressions to test each file for the presence of the material or HTML formatting tags you are looking for. In this way, you can narrow down the affected files to those that contain the material you want to delete or change. You can then use regular expressions to remove obsolete material, and finally, you can use regular expressions again to find and replace tags that need replacing.

Another example of how useful regular expressions can be is a language whose string processing capabilities are unknown. VBScript is a subset of Visual Basic with rich string processing capabilities. Visual Basic Scripting Edition, which is similar to C, does not have this capability. Regular expressions bring significant improvements to the string handling capabilities of Visual Basic Scripting Edition. However, it may be more efficient to use regular expressions in VBScript, which allows multiple string operations to be performed in a single expression.

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