Regular Expressions
How to Convert Glob Patterns to Regex Without Surprises
Convert glob patterns to regex: what star and question mark mean, the recursive form, escaping dots, conversion rules and library helpers.
6 min read
Tag
imagemagick
3 posts
Command Line
How to Use date to Print and Convert Dates in Real Scripts
Use the date command to print formats, convert epoch seconds, add and subtract days, set time zones and name files by timestamp in real scripts.
6 min read
Text Processing
How to Convert Between Tabs Spaces and Commas the Right Way
Convert tabs, spaces and commas between delimiters with tr, sed, awk, expand and unexpand, and see which methods break on quoted fields or repeated spaces.
6 min read