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I have a string like

?my name is Pankaj?

I want to remove the ? character from the string.

"?select * from eici limit 10".replace("?", "") 

Works fine. But I want to know if there is any other way to remove these kind of unnecessary characters.

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works fine.

If it works fine, then why bother? Your solution is totally acceptable.

but I want to know is there is any other way to remove these kind of unnecessary characters.

You could also use

"?select * from eici limit 10".split("?").join("") 

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