About regular expressions

This page explains regular expressions with examples.

Index

Filter method

You can specify the filter method in some extensions.

You can use wildcards to specify the filter pattern.

Sample	Applicable file name
*.jpg	All files with a .jpg extension
*	All files
?.jpg	Files with a .jpg extension and any 1 character
??.jpg	Files with a .jpg extension and any 2 character
wh*	who, why, what, when, which...
wh?	Who or why

You can use regular expressions to specify the filter pattern.

Sample	Applicable file name
\d{4}-\d{2}-\d{2}\.csv	Files with .csv extension and YYYYY-MM-DD file name format
\d+\.png	Files with .png extension and a file name of at least one arbitrary number