How to Convert a Set of Strings to a Set of Floats in Kotlin - Step by Step Examples

How to Convert a Set of Strings to a Set of Floats in Kotlin ?

Answer

To convert a set of strings to a set of floats in Kotlin, you can use the mapNotNull() function along with the toFloatOrNull() function to transform each string value into its corresponding float value.


✐ Examples

1 Convert a Set of Strings ["1.1", "2.2", "3.3"] to Floats

In this example,

  1. First, we create a set of strings named stringSet1 with values ["1.1", "2.2", "3.3"].
  2. Next, we use the mapNotNull() function on stringSet1 to transform each string value into its corresponding float value. We pass a lambda function to mapNotNull() that attempts to convert each string value to a float using the toFloatOrNull() function.
  3. The mapNotNull() function returns a list of non-null float values. We convert this list into a set of floats using the toSet() function.
  4. Finally, we print the set of floats to verify the conversion.

Kotlin Program

fun main() {
    val stringSet1 = setOf("1.1", "2.2", "3.3")
    val floatSet1 = stringSet1.mapNotNull { it.toFloatOrNull() }.toSet()
    println(floatSet1)
}

Output

{1.1, 2.2, 3.3}

2 Convert a Set of Strings ["4.5", "5.6", "6.7"] to Floats

In this example,

  1. First, we create a set of strings named stringSet2 with values ["4.5", "5.6", "6.7"].
  2. Next, we use the mapNotNull() function on stringSet2 to transform each string value into its corresponding float value. We pass a lambda function to mapNotNull() that attempts to convert each string value to a float using the toFloatOrNull() function.
  3. The mapNotNull() function returns a list of non-null float values. We convert this list into a set of floats using the toSet() function.
  4. Finally, we print the set of floats to verify the conversion.

Kotlin Program

fun main() {
    val stringSet2 = setOf("4.5", "5.6", "6.7")
    val floatSet2 = stringSet2.mapNotNull { it.toFloatOrNull() }.toSet()
    println(floatSet2)
}

Output

{4.5, 5.6, 6.7}

Summary

In this tutorial, we learned How to Convert a Set of Strings to a Set of Floats in Kotlin language with well detailed examples.


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