Fix hashCode and toString.

README.md

@@ -1,5 +1,5 @@
 # ULID scala
-[![Build Status](https://github.com/jkugiya/ulid-scala/workflows/CI/badge.svg)
+![Build Status](https://github.com/jkugiya/ulid-scala/workflows/CI/badge.svg)
 [![Coverage Status](https://coveralls.io/repos/github/jkugiya/ulid-scala/badge.svg?branch=master)](https://coveralls.io/github/jkugiya/ulid-scala?branch=master)  
 
 ULID (Universally Unique Lexicographically Sortable Identifier) generator and parser for Scala.

build.sbt

@@ -1,7 +1,7 @@
 ThisBuild / scalaVersion     := "3.3.3"
 // Make sure to update .github/workflows/ci.yml when updating this list
 ThisBuild / crossScalaVersions := Seq("3.3.3", "2.13.14", "2.12.19")
-ThisBuild / version          := "1.0.4-SNAPSHOT"
+ThisBuild / version          := "1.0.5-SNAPSHOT"
 ThisBuild / organization     := "com.github.jkugiya"
 ThisBuild / organizationName := "jkugiya"
 

shared/src/main/scala/jkugiya/ulid/ULID.scala

@@ -112,12 +112,48 @@ class ULID private[ulid](val time: Long, private[ulid] val originalRandomness: A
     }
   }
 
+  override def toString(): String = {
+    val sb = new StringBuilder
+    sb.append("ULID(b32=")
+    sb.append(base32)
+    sb.append(", uuid=")
+    sb.append(uuid)
+    sb.append(")")
+    sb.toString
+  }
+
   override def equals(obj: Any): Boolean = obj match {
     case other: ULID =>
-      (time == other.time) && (originalRandomness sameElements other.originalRandomness)
+      if (this eq other) return true
+      if (time != other.time) return false
+
+      {
+        var idx = 0
+        while (idx < originalRandomness.length) {
+          if (originalRandomness(idx) != other.originalRandomness(idx)) return false
+          idx += 1
+        }
+      }
+
+      true
     case _ =>
       false
   }
 
+  override def hashCode(): Int = {
+    val prime = 31
+    var result = 1
+    result = prime * result + time.hashCode
+
+    {
+      var idx = 0
+      while (idx < originalRandomness.length) {
+        result = prime * result + originalRandomness(idx)
+        idx += 1
+      }
+    }
+
+    result
+  }
 }