scala - How to convert Any number to Double?

Scala - How to convert Any number to Double?

In Scala, you can convert any numeric value to a Double using the toDouble method. Here's how you can do it:

val intValue: Int = 10 val doubleValue: Double = intValue.toDouble println(doubleValue) // Output: 10.0

Similarly, you can convert other numeric types such as Float, Long, Short, etc., to Double using the toDouble method:

val floatValue: Float = 20.5f val doubleValue: Double = floatValue.toDouble println(doubleValue) // Output: 20.5

This method ensures that the numeric value is converted to a Double with proper precision.

Examples

  1. Scala: Convert Int to Double

    Description: This query seeks a method to convert an integer to a double in Scala.

    val intValue: Int = 42 val doubleValue: Double = intValue.toDouble

    This code converts an integer value to a double using the toDouble method.

  2. Scala: Convert Long to Double

    Description: This query focuses on converting a long integer to a double in Scala.

    val longValue: Long = 1234567890L val doubleValue: Double = longValue.toDouble

    Similar to the previous example, this code utilizes the toDouble method to convert a long integer to a double.

  3. Scala: Convert Float to Double

    Description: This query looks for a way to convert a floating-point number to a double in Scala.

    val floatValue: Float = 3.14f val doubleValue: Double = floatValue.toDouble

    Here, the toDouble method is used to convert a floating-point value to a double.

  4. Scala: Convert BigDecimal to Double

    Description: This query investigates converting a BigDecimal to a double in Scala.

    val bigDecimalValue: BigDecimal = BigDecimal("123.456") val doubleValue: Double = bigDecimalValue.toDouble

    By using the toDouble method, a BigDecimal can be converted to a double.

  5. Scala: Convert String to Double

    Description: This query seeks a method to convert a string representation of a number to a double in Scala.

    val stringValue: String = "3.14" val doubleValue: Double = stringValue.toDouble

    This code converts a string containing a numeric value to a double using the toDouble method.

  6. Scala: Convert AnyVal to Double

    Description: This query explores converting any value of a numeric type to a double in Scala.

    def convertToDouble[T <: AnyVal](value: T): Double = value match { case intValue: Int => intValue.toDouble case longValue: Long => longValue.toDouble case floatValue: Float => floatValue.toDouble // Add cases for other numeric types as needed case _ => throw new IllegalArgumentException("Unsupported type") }

    This code defines a function convertToDouble that accepts any value of a numeric type and converts it to a double.

  7. Scala: Convert AnyRef to Double

    Description: This query investigates converting any reference type to a double in Scala.

    def convertToDouble(value: AnyRef): Double = value match { case stringValue: String => stringValue.toDouble // Add cases for other convertible reference types as needed case _ => throw new IllegalArgumentException("Unsupported type") }

    This code defines a function convertToDouble that accepts any reference type and converts it to a double if possible.

  8. Scala: Convert Any to Double with type checking

    Description: This query looks for a method to convert any type to a double with type checking in Scala.

    def convertToDouble(value: Any): Double = value match { case intValue: Int => intValue.toDouble case longValue: Long => longValue.toDouble case floatValue: Float => floatValue.toDouble case doubleValue: Double => doubleValue case stringValue: String => stringValue.toDouble // Add cases for other convertible types as needed case _ => throw new IllegalArgumentException("Unsupported type") }

    This code defines a function convertToDouble that accepts any type and converts it to a double with appropriate type checking.

  9. Scala: Convert Any to Double with error handling

    Description: This query seeks a method to convert any type to a double in Scala with error handling.

    def convertToDouble(value: Any): Double = { try { value.toString.toDouble } catch { case _: NumberFormatException => throw new IllegalArgumentException("Cannot convert to double") } }

    This code attempts to convert any value to a double using toDouble, handling potential NumberFormatExceptions.

  10. Scala: Convert Any to Double with default value

    Description: This query investigates converting any type to a double in Scala with a default value if conversion fails.

    def convertToDouble(value: Any, default: Double): Double = { try { value.toString.toDouble } catch { case _: NumberFormatException => default } }

    This code attempts to convert any value to a double and returns a default value if the conversion fails.

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