this is a white list regex that invalidates input with "=

//Accepts whitespaces and positive numeric values including integers and decimals(ortional) with 3 precisions only. //Ex: "999", "99999.999", " 999.999" -> ACCEPTABLE

'test' - no match 'test test' - no match ' test' - match (space at the start) 'test ' - match (space at the end) 'test test' - match (single space in the middle)

Extract file extention from URL

To recognize url like (for the more complex one): https://word.office.live.com/wv/WordView.aspx?FBsrc=https%3A%2F%2Fwww.facebook.com%2Fattachments%2Ffile_preview.php%3Fid%3D713987203%26time%3D145332%26metadata&access_token=1606%3AAVKzw1&title=2016+Test+Document+Word+Online.doc

http://stackoverflow.com/q/34914559/368691

With optional 9 digit

allow only alpabets digits and special characters

to check email bunch with commas

Extract the domain out of an url

Regular expression to exclude a filename path.

This ER is nice to get a hash from URL, I used today to pass the name of an bootstrap TAB and set the focus when the page loads. I did it using the Replace of JavaScript.