var fileExtensionPatter = /\.([0-9a-z]+)(?=[?#])|(\.)(?:[\w]+)$/ var ma1 = 'css/global.css?v=1.2'.match(fileExtensionPatter)[0]; console.log(ma1); // return .css ...

Capturing lucene special characters for escaping

https

The way I like it formatted

Extracts HTML tags, HTML entities, alphanumeric words, and the rest.

Matches phone #s (aaa) bbb-cccc aaa bbb cccc aaabbbcccc and such.

In Vehicle Identification Number used by motor vehicle manufacturers, the letters I, O and Q are omitted for their similarity to 1 or 0.

Checks for well formed tags. Must include mailto, http or https. Must have quoted href. Other attribues before or after href are accepted. Must be ended with

works but capturing groups are not so organized testing string: "https://127.0.0.1:8000/path/subpath/otherpath" "https://127.0.0.1/path/subpath/otherpath" "https://127.0.0.1/12345/subpath/otherpath"

This catches a few formats for dates, including the year, and seperates as much as I think at the moment is possible to make it easy to manipulate the needed data points in the expression