Validates most email addresses. Using the range [A-Za-z0-9] at the beginning instead of \w means an address cannot begin with an underscore. This range is also used to exclude underscores from the domain (part after @).

Remove repeated elements from a plain JSON array.

Match 5 forward slashes

JS Regex Lazy quantifier

Matches sentences, but skips over abreviations

23

Accepts spaces or not 1234567890 123 456 7890

3 Forms: H5H 5H5 H5H5H5 H5H-5H5