regexSplit
Slices the input string into substrings separated by the expression and returns a slice of the substrings between those expression matches. The last parameter n
determines the number of substrings to return, where -1
means return all matches
regexSplit "z+" "pizza" -1
The above produces [pi a]
regexSplit
panics if there is a problem and mustRegexSplit
returns an error to the
template engine if there is a problem.