In the series “convenience wrappers for small tasks that increase code readability”, today contains() is starring. Having a contains() method could also serve another purpose: to maybe prevent people from using match() to find out if a string contains a given substring (what is still proposed in some JS tutorials out there…). So, I want the contains() method to also have a switch to work case-insensitive.
Besides indexOf(), there are some other ways to achieve this, so – let’s have a competition and find out who’s the fastest!
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