v0.18.1 release

README.md

@@ -1,6 +1,6 @@
 # krangl
 
-[ ![Download](https://img.shields.io/badge/Maven%20Central-0.18-orange) ](https://mvnrepository.com/artifact/com.github.holgerbrandl/krangl)  [![Build Status](https://github.com/holgerbrandl/krangl/workflows/build/badge.svg)](https://github.com/holgerbrandl/krangl/actions?query=workflow%3Abuild) [![Gitter](https://badges.gitter.im/holgerbrandl/krangl.svg)](https://gitter.im/holgerbrandl/krangl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[ ![Download](https://img.shields.io/badge/Maven%20Central-0.18.1-orange) ](https://mvnrepository.com/artifact/com.github.holgerbrandl/krangl)  [![Build Status](https://github.com/holgerbrandl/krangl/workflows/build/badge.svg)](https://github.com/holgerbrandl/krangl/actions?query=workflow%3Abuild) [![Gitter](https://badges.gitter.im/holgerbrandl/krangl.svg)](https://gitter.im/holgerbrandl/krangl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 `krangl` is a {K}otlin library for data w{rangl}ing. By implementing a grammar of data manipulation using a modern functional-style API, it allows to filter, transform, aggregate and reshape tabular data.
 
@@ -32,7 +32,7 @@ repositories {
 }
 
 dependencies {
-    implementation "com.github.holgerbrandl:krangl:0.18"
+    implementation "com.github.holgerbrandl:krangl:0.18.1"
 }
 ```
 Declaring the repository is purely optional as it is the default already.

build.gradle

@@ -1,6 +1,6 @@
 
 plugins {
-    id "org.jetbrains.kotlin.jvm" version "1.6.20"
+    id "org.jetbrains.kotlin.jvm" version "1.7.0"
     id "java"
     id "maven-publish"
     id "signing"
@@ -35,9 +35,9 @@ dependencies {
 //    implementation 'org.jetbrains.kotlinx:dataframe:0.8.0-rc-7'
 //    testImplementation 'org.jetbrains.kotlinx:dataframe:0.8.0-rc-7'
 
-    testImplementation group: 'junit', name: 'junit', version: '4.12'
+    testImplementation group: 'junit', name: 'junit', version: '4.13.1'
     testImplementation('io.kotest:kotest-assertions-core:5.2.2')
-    testImplementation 'com.h2database:h2:2.1.210'
+    testImplementation 'com.h2database:h2:2.1.212'
     testImplementation 'org.jetbrains.kotlin:kotlin-script-runtime:1.6.10'
 }
 
@@ -100,7 +100,7 @@ test {
 //http://stackoverflow.com/questions/34377367/why-is-gradle-install-replacing-my-version-with-unspecified
 group 'com.github.holgerbrandl'
 //version '0.16.95'
-version '0.18'
+version '0.18.1'
 
 
 

docs/userguide/docs/index.md

@@ -1,4 +1,4 @@
-[ ![Download](https://img.shields.io/badge/Maven%20Central-0.18-orange) ](https://mvnrepository.com/artifact/com.github.holgerbrandl.krangl/krangl)  [![Build Status](https://github.com/holgerbrandl/krangl/workflows/build/badge.svg)](https://github.com/holgerbrandl/krangl/actions?query=workflow%3Abuild) [![Gitter](https://badges.gitter.im/holgerbrandl/krangl.svg)](https://gitter.im/holgerbrandl/krangl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[ ![Download](https://img.shields.io/badge/Maven%20Central-0.18.1-orange) ](https://mvnrepository.com/artifact/com.github.holgerbrandl.krangl/krangl)  [![Build Status](https://github.com/holgerbrandl/krangl/workflows/build/badge.svg)](https://github.com/holgerbrandl/krangl/actions?query=workflow%3Abuild) [![Gitter](https://badges.gitter.im/holgerbrandl/krangl.svg)](https://gitter.im/holgerbrandl/krangl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 This is the manual of [krangl](https://github.com/holgerbrandl/krangl).
 
@@ -40,7 +40,7 @@ repositories {
 }
 
 dependencies {
-    implementation "com.github.holgerbrandl:krangl:0.18"
+    implementation "com.github.holgerbrandl:krangl:0.18.1"
 }
 ```
 Declaring the repository is purely optional as it is the default already.

src/main/kotlin/krangl/Builder.kt

@@ -123,10 +123,9 @@ inline fun <reified T> DataFrame.unfold(
     val extProperties = properties + properties.map { "get" + it.capitalize() }
     val propsOrGetters = detectPropertiesByReflection<T>()
 
-
     val filtMembers = propsOrGetters
         // match by name
-        .filter { extProperties.contains(it.name) }
+        .filter { it.parameters.size==1 && extProperties.contains(it.name) }  // discard extension functions in class body
 
     // todo make sure that unfolded columns are not yet present in df, and warn if so and append _1, _2, ... suffix
     val unfolded = filtMembers.fold(this) { df, kCallable ->

src/test/kotlin/krangl/test/TypeInterfaceTest.kt

@@ -9,6 +9,7 @@ import java.io.File
 import java.io.PrintStream
 import java.net.URL
 import java.util.*
+import kotlin.time.Duration
 
 /**
  * @author Holger Brandl
@@ -280,6 +281,38 @@ class ValueClassTests {
     }
 }
 
+class ExtensionPropertyTest {
+
+    class Something(
+        val foo: String,
+        val bar: Int?,
+    ) {
+        val Duration.ticks: Double
+            get() = 0.0
+
+        val Int.other: Double
+            get() = 0.0
+    }
+
+
+    @Test
+    fun `it should support nullable value class properties in asDataFrame`() {
+        val df = dataFrameOf(
+            AnyCol(
+                "st", listOf(
+                    Something("hey", 42),
+                    Something("ho", null)
+                )
+            )
+        )
+
+        val dfUnfold = df.unfold<Something>("st")
+
+        dfUnfold.ncol shouldBe 3
+        dfUnfold.names shouldBe listOf("st", "bar", "foo")
+    }
+}
+
 internal data class CapturedOutput(val stdout: String, val stderr: String)
 
 internal fun captureOutput(expr: () -> Any): CapturedOutput {