core: Add unless/unlessM as dual of when/whenM
#3259
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val zio: ZIO[..., ..., ...] = ...
val cond: Boolean = ...
val when = zio.when(cond)
val unless0 = zio.when(!cond) // negation is easy
val unless1 = zio.unless(cond) // maybe clearer
val condM: UIO[Boolean] = ...
val whenM = zio.whenM(cond)
val unlessM0 = zio.whenM(cond.map(!_)) // negation is more clunky
val unlessM1 = zio.unlessM(cond) // clearer and more concise |
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Yes. There is a little danger here that we have another different set of ways to do very similar things but I am inclined to think this makes sense. |
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in the spirit of
filter/filterNot,doUntil/doWhile,retryUntil/retryWhileand the like.