You already know about the method split(), which creates an array from an input string and a delimiter string. Let's take a string of comma-separated values and split it:

var csv = 'one, two,three ,four';

["one", " two", "three ", "four"]

Because the input string has some inconsistent spaces before and after the commas, the array result has spaces too. With a regular expression, we can fix this, using \s*, which means "zero or more spaces":


["one", "two", "three", "four"]
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