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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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3
Task/Determine-if-a-string-is-numeric/Scala/determine-if-a-string-is-numeric-1.scala Normal file
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import scala.util.control.Exception.allCatch
def isNumber(s: String): Boolean = (allCatch opt s.toDouble).isDefined

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Task/Determine-if-a-string-is-numeric/Scala/determine-if-a-string-is-numeric-2.scala Normal file
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def isNumeric(input: String): Boolean = input.forall(_.isDigit)

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Task/Determine-if-a-string-is-numeric/Scala/determine-if-a-string-is-numeric-3.scala Normal file
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def isNumeric2(str: String): Boolean = {
str.matches(s"""[+-]?((\d+(e\d+)?[lL]?)|(((\d+(\.\d*)?)|(\.\d+))(e\d+)?[fF]?))""")
}

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Task/Determine-if-a-string-is-numeric/Scala/determine-if-a-string-is-numeric-4.scala Normal file
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def isNumeric(str: String): Boolean = {
!throwsNumberFormatException(str.toLong) || !throwsNumberFormatException(str.toDouble)
}
def throwsNumberFormatException(f: => Any): Boolean = {
try { f; false } catch { case e: NumberFormatException => true }
}