se-edu / addressbook-level4 / 1393

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master: 94%

Pull #331

travis-ci

Implement IndexUtil class

"i - 1" is used to convert 'i' from a one-based index to a zero-based
index.

Comments have to be added whenever "i - 1" is used as it is not obvious
whether we are taking the item before i, or whether we are converting
'i' from a one-based index into a zero-based index, which decreases the
"code quality".

Implementing a IndexUtil#oneToZeroIndex() method which returns the zero-
based index given the one-based index as input.

The use of IndexUtil.oneToZeroIndex(i) removes the need for a comment on
when we convert 'i' from a one-based index to a zero-based index.

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