2020-12-25 Update: Added "RGB To Hex Conversion" and "Leap Year"

Author: fartem

README.md

@@ -32,6 +32,7 @@ Profile on Codewars: [fartem](https://www.codewars.com/users/fartem).
 | Even numbers in an array | [Link](https://www.codewars.com/kata/5a431c0de1ce0ec33a00000c) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/EvenNumbersInAnArray.kt) |
 | Find Screen Size | [Link](https://www.codewars.com/kata/5bbd279c8f8bbd5ee500000f) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/FindScreenSize.kt) |
 | Hide password from jdbc url | [Link](https://www.codewars.com/kata/5a726f16373c2ee6c60000db) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/HidePasswordFromJDBCUrl.kt) |
+| Leap Year | [Link](https://www.codewars.com/kata/526c7363236867513f0005ca) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/LeapYear.kt) |
 | Move 10 | [Link](https://www.codewars.com/kata/57cf50a7eca2603de0000090) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/Move10.kt) |
 | Plus - minus - plus - plus - ... - Count | [Link](https://www.codewars.com/kata/5bbb8887484fcd36fb0020ca) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/PlusMinusPlusPlusCount.kt) |
 | Predict your age! | [Link](https://www.codewars.com/kata/5aff237c578a14752d0035ae) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/PredictYourAge.kt) |
@@ -47,6 +48,12 @@ Profile on Codewars: [fartem](https://www.codewars.com/users/fartem).
 | HTML dynamic color string generation | [Link](https://www.codewars.com/kata/56f1c6034d0c330e4a001059) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu6/HTMLDynamicColorStringGeneration.kt) |
 | Java format Unicode encoder/decorder | [Link](https://www.codewars.com/kata/58e2c062542a419083000033) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu6/JavaFormatUnicodeEncoderDecoder.kt) |
 
+### 5 kyu
+
+| Name | Link to Codewars | Link to solution |
+| --- | --- | --- |
+| RGB To Hex Conversion | [Link](https://www.codewars.com/kata/513e08acc600c94f01000001) | [Link](./src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu5/RGBToHexConversion.kt) |
+
 ### 4 kyu
 
 | Name | Link to Codewars | Link to solution |

src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu5/RGBToHexConversion.kt

@@ -0,0 +1,19 @@
+package com.smlnskgmail.jaman.codewarskotlin.kyu5
+
+// https://www.codewars.com/kata/513e08acc600c94f01000001
+class RGBToHexConversion(
+        private val r: Int,
+        private val g: Int,
+        private val b: Int
+) {
+
+    fun solution(): String {
+        @Suppress("MagicNumber")
+        return "%02X%02X%02X".format(
+                r.coerceIn(0..255),
+                g.coerceIn(0..255),
+                b.coerceIn(0..255)
+        )
+    }
+
+}

src/main/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/LeapYear.kt

@@ -0,0 +1,11 @@
+package com.smlnskgmail.jaman.codewarskotlin.kyu7
+
+// https://www.codewars.com/kata/526c7363236867513f0005ca
+class LeapYear(private val input: Int) {
+
+    fun solution(): Boolean {
+        @Suppress("MagicNumber")
+        return input % 4 == 0 && (input % 400 == 0 || input % 100 != 0)
+    }
+
+}

src/test/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu5/RGBToHexConversionTest.kt

@@ -0,0 +1,32 @@
+package com.smlnskgmail.jaman.codewarskotlin.kyu5
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class RGBToHexConversionTest {
+
+    @Test
+    fun testFixed() {
+        assertEquals(
+                "000000",
+                RGBToHexConversion(0, 0, 0).solution()
+        )
+        assertEquals(
+                "000000",
+                RGBToHexConversion(0, 0, -20).solution()
+        )
+        assertEquals(
+                "FFFFFF",
+                RGBToHexConversion(300, 255, 255).solution()
+        )
+        assertEquals(
+                "ADFF2F",
+                RGBToHexConversion(173, 255, 47).solution()
+        )
+        assertEquals(
+                "9400D3",
+                RGBToHexConversion(148, 0, 211).solution()
+        )
+    }
+
+}

src/test/kotlin/com/smlnskgmail/jaman/codewarskotlin/kyu7/LeapYearTest.kt

@@ -0,0 +1,18 @@
+package com.smlnskgmail.jaman.codewarskotlin.kyu7
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class LeapYearTest {
+
+    @Test
+    fun `Basic Tests`() {
+        assertFalse(LeapYear(1234).solution())
+        assertTrue(LeapYear(1984).solution())
+        assertTrue(LeapYear(2000).solution())
+        assertFalse(LeapYear(2010).solution())
+        assertFalse(LeapYear(2013).solution())
+    }
+
+}