Package growthbook.sdk.java.util

Class MathUtils

java.lang.Object
growthbook.sdk.java.util.MathUtils
public class MathUtils extends Object

  • Constructor Summary

    Constructors
    Constructor
    Description
    MathUtils()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static double
    clamp(double value, double lowerRange, double upperRange)
    Given a value, ensures it's clamped between the range provided
    static long
    fnv1a_32(byte[] data)
    Fowler-Noll-Vo algorithm fnv32a returns a long, so we convert that to a double using a modulus
    static long
    fnv1a_32(String value)
    Fowler-Noll-Vo FNV-1a 32 over the string's UTF-16 code units, like the JS SDK, which XORs each charCodeAt value.
    static double
    sum(List<Double> items)
    Add up all the numbers

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • MathUtils

      public MathUtils()

  • Method Details

    • fnv1a_32

      public static long fnv1a_32(byte[] data)
      Fowler-Noll-Vo algorithm fnv32a returns a long, so we convert that to a double using a modulus
      Parameters:
      data - byte list
      Returns:
      long

    • fnv1a_32

      public static long fnv1a_32(String value)
      Fowler-Noll-Vo FNV-1a 32 over the string's UTF-16 code units, like the JS SDK, which XORs each charCodeAt value. A character outside the BMP contributes its two surrogates.
      Parameters:
      value - the string to hash
      Returns:
      the unsigned 32-bit hash

    • clamp

      public static double clamp(double value, double lowerRange, double upperRange)
      Given a value, ensures it's clamped between the range provided
      Parameters:
      value - The number you want to make sure is between lowerRange and upperRange
      lowerRange - The lowest value
      upperRange - The highest value
      Returns:
      the clamped number

    • sum

      public static double sum(List<Double> items)
      Add up all the numbers
      Parameters:
      items - Numbers to add
      Returns:
      total