#Intro
Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3
Kotlin project website is at kotlin.jetbrains.org.
All the codes here can be copied and run on Kotlin online editor.
Let's get started.
| $ groovy test.groovy | |
| Caught: groovy.lang.MissingPropertyException: No such property: foo for class: Foo | |
| groovy.lang.MissingPropertyException: No such property: foo for class: Foo | |
| at Foo$_bar_closure1.doCall(test.groovy:10) | |
| at Foo.bar(test.groovy:9) | |
| at Foo$bar.call(Unknown Source) | |
| at test.run(test.groovy:20) |
| $ groovy -version | |
| Groovy Version: 2.4.7 JVM: 1.8.0_91 Vendor: Oracle Corporation OS: Linux | |
| $ groovy test.groovy | |
| org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: | |
| /home/alien/test.groovy: 6: Apparent variable 'name' was found in a static scope but doesn't refer to a local variable, static field or class. Possible causes: | |
| You attempted to reference a variable in the binding or an instance variable from a static context. | |
| You misspelled a classname or statically imported field. Please check the spelling. | |
| You attempted to use a method 'name' but left out brackets in a place not allowed by the grammar. | |
| @ line 6, column 16. |
| function hoog { | |
| search=$1 | |
| count=$2 | |
| if [ -z $count ] ; then | |
| hoogle -q -c "$search" | grep -v -e "^Searching for:" | awk 'BEGIN { a = 1 } { print a ") " $(NF-NF) ; a = a + 1 }' | |
| else | |
| hoogle -q -c -i -s $count "$search" | |
| fi | |
| } |
| fun String.isPhoneNumber() = matches(Regex("\\d{11}")) |
| 'use strict'; | |
| language: java | |
| jdk: | |
| - oraclejdk7 | |
| - oraclejdk8 |
| interface PacketTranscoder | |
| open class Packet | |
| class StringPacket(val body: String) : Packet() | |
| interface PacketDecoder<out T : Packet> : PacketTranscoder { | |
| fun decode(client: String, buf: Array<String>): T |