for test cases I tend to use iterator.next() to get the first item. It will fail spetacularly if the iterator has no next() and if it does you have first(). No need for extra functions.
Claude On Thu, Jan 11, 2018 at 3:22 PM, Gary Gregory <garydgreg...@gmail.com> wrote: > Hi, > > Some APIs, either due to age or design, deal out an Iterator and nothing > else. And sometimes, all I care about (in tests, for example, or if the > list is a set of aliases) is the first object. > > The method IteratorUtils.first(Iterator) is a shorthand for > IteratorUtils.get(Iterator, 0). > > I do not plan to add last(), the obvious sibling to such a method, YAGNI > for now. > > Gary > > > On Thu, Jan 11, 2018 at 2:52 AM, sebb <seb...@gmail.com> wrote: > > > Also, what is the use case for such methods? > > How many will there be - i.e. do you plan to add .last, .second, .random? > > > > I'm not keen on methods that save a few lines of code unless there's a > > common use case and the behaviour is obvious/unambiguous from the > > name. > > > > On 11 January 2018 at 07:45, Claude Warren <cla...@xenei.com> wrote: > > > does first return the first object or the first non-null object? > > > > > > If the first object how do you distinguish between first() returning a > > null > > > object and there being an empty container? > > > If the first non-null object how do you determine that nulls were > > skipped? > > > > > > Keep in mind that the Optional implementation in Java8 will throw an > > > exception if it is constructed with a null object. > > > > > > On Wed, Jan 10, 2018 at 4:45 PM, Gary Gregory <garydgreg...@gmail.com> > > > wrote: > > > > > >> Hi All, > > >> > > >> I plan on adding methods like: > > >> - IteratorUtils.first(Iterator) > > >> - IterableUtils.first(Iterable) > > >> > > >> Gary > > >> > > > > > > > > > > > > -- > > > I like: Like Like - The likeliest place on the web > > > <http://like-like.xenei.com> > > > LinkedIn: http://www.linkedin.com/in/claudewarren > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > > For additional commands, e-mail: dev-h...@commons.apache.org > > > > > -- I like: Like Like - The likeliest place on the web <http://like-like.xenei.com> LinkedIn: http://www.linkedin.com/in/claudewarren
