< > BotCompany Repo | #1015727 // singletonOpt - synonym of getSingletonOpt - return single elemtent of list if length == 1 or null otherwise

JavaX fragment (include) [tags: use-pretranspiled]

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static <A> A singletonOpt(Collection<A> l) {
  ret l(l) == 1 ? first(l) : null;
}

static <A> A singletonOpt(A[] l) {
  ret l(l) == 1 ? first(l) : null;
}

Author comment

Began life as a copy of #1005177

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