A regular expression is nothing but a sequence of characters that define a pattern which then can be used to filter or match information. This article is not a tutorial on regular expression but shows the versatility of regular expression in our day-to-day life and some useful references.
Data is everywhere and is the new oil for modern generation. Data can be broadly categorized as binary data such as (mp3 file, png file, etc.) which in most cases is not human-readable, whereas text data like emails, notes, etc. are more human-friendly. Regular expression is well suited for searching for content in text data.