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[Music] welcome to that lesson hope this short series this lesson Im going to show you how to add the functionality to remove the unwanted characters like the dollar sign like all these additional to see when a threat Iping in them theres tripped off okay so thats what we are going to deal with right now so how were going to do that were going to go back to this event where the use sighs typing in and what I did is I created an array and called it but characters and these ow and I am using the regular expressions so thats an array and in here I add a regular expression maybe thats the correct I dont want and i add the flood gee and i that means you should check everywhere in this string and also not case-sensitive so thats how I added them okay if I wanted to add another one like the @ symbol I added that way ji-hye thats a flag I dont know you may find that odd thus like the class will give you an error so you you do that easy escape it using their backslash that way you sk
