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September 20, 2019 08:22
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implementing the repeat until (like do while) only with basic scala constructs
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| object RepeatTest { | |
| class RepeatHelper(cmd: => Unit) { | |
| def until(cond: => Boolean): Unit = if (cond) repeat(cmd) | |
| } | |
| def repeat(cmd: => Unit): RepeatHelper = { | |
| cmd | |
| new RepeatHelper(cmd) | |
| } | |
| def main(args: Array[String]): Unit = { | |
| var x = 3 | |
| repeat {x = x - 1; println(x)} until (x > 0) | |
| } | |
| } |
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