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Clever Things People Do In Groovy So You Have To Know About Them
Andy Balaamartificialworlds.net/blog
This work is licensed under a
Creative Commons
a = 3 + 1
println(a)
a = 3 + 1
println(a)
4
b = 3
+ 1
println(b)
b = 3
+ 1
println(b)
3
c = 3\
+ 1
println(c)
c = 3\
+ 1
println(c)
4
d = (3
+ 1)
println(d)
d = (3
+ 1)
println(d)
4
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(1, 2)
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(1, 2)
1
2
def printArgs(a, b) {
println(a)
println(b)
}
printArgs 3, 4
def printArgs(a, b) {
println(a)
println(b)
}
printArgs 3, 4
3
4
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) 6
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) 6
Caught: groovy.lang.MissingMethodException: No signature of method: tmp.printArgs() is applicable for argument types: (java.lang.Integer) values: [5]
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) {}
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) {}
5
tmp$_run_closure1@1ffe63b9
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) {println("6")}
def printArgs(a, b) {
println(a)
println(b)
}
printArgs(5) {println("6")}
5
tmp$_run_closure1@1ffe63b9
x = [a:3, b:4]
println(x)
x = [a:3, b:4]
println(x)
[a:3, b:4]
x = a:3, b:4
println(x)
x = a:3, b:4
println(x)
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
/home-andrebal-writing/groovy/videos-groovy-clever-things/groovy-maze/tmp.groovy: 1: expecting EOF, found ':' @ line 1, column 6.
x = a:3, b:4
^
1 error
println(a:3, b:4)
println(a:3, b:4)
[a:3, b:4]
println a:3, b:4
println a:3, b:4
[a:3, b:4]
4.times {println("Andy is cool")}
4.times {println("Andy is cool")}
Andy is cool
Andy is cool
Andy is cool
Andy is cool
def letters = new TreeMap([
"a": 2,
"b": 3,
"c": 4,
"z": 1,
])
letters.each {println(it)}
def letters = new TreeMap([
"a": 2,
"b": 3,
"c": 4,
"z": 1,
])
letters.each {println(it)}
a=2
b=3
c=4
z=1
def letters = new TreeMap(["a":2, "b":3, "c":4, "z":1])
Map.metaClass.eachInValueOrder = {
entries = new ArrayList(entrySet())
entries.sort({e1, e2 -> e1.getValue() - e2.getValue()})
entries.each(it)
}
letters.eachInValueOrder {println(it)}
def letters = new TreeMap(["a":2, "b":3, "c":4, "z":1])
Map.metaClass.eachInValueOrder = {
entries = new ArrayList(entrySet())
entries.sort({e1, e2 -> e1.getValue() - e2.getValue()})
entries.each(it)
}
letters.eachInValueOrder {println(it)}
z=1
a=2
b=3
c=4
class PipeConcat {
String c
def plus(y) {
"$c|$y.c"
}
}
def x = new PipeConcat(c:"foo")
def y = new PipeConcat(c:"bar")
println(x + y)
class PipeConcat {
String c
def plus(y) {
"$c|$y.c"
}
}
def x = new PipeConcat(c:"foo")
def y = new PipeConcat(c:"bar")
println(x + y)
foo|bar
_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_
_%_*_._._._._._._%_._._._._._._*_%_
_%_._%_%_._%_._%_%_%_._%_._%_%_._%_
_%_._._._._%_._._._._._%_._._._._._
_%_%_%_%_._%_%_%_._%_%_%_._%_%_%_%_
_._._._._._%_._|_._|_._%_._._._._._
_%_%_%_%_._%_%_%_._%_%_%_._%_%_%_%_
_%_._._._._%_._._._._._%_._._._._._
_%_._%_%_._%_._%_%_%_._%_._%_%_._%_
_%_*_+_._._._._._%_._._._._._._*_%_
_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_%_
class MazeUnderScore {
def mod(MazeUnderScore other) { this }
def or(MazeUnderScore other) { this }
def plus(MazeUnderScore other) { this }
def multiply(MazeUnderScore other) { this }
def get_() { new MazeUnderScore() }
}
def _ = new MazeUnderScore()
// ...
logic = new Logic()
// ...
at start then ghosts.mode becomes normal
when ghost hits player then player dies
when player hits pill then ghosts.mode becomes scared and pill becomes deleted
rules done
logic.rules.each {println(it)}
logic = new Logic()
at start then ghosts.mode becomes normal
when ghost hits player then player dies
when player hits pill then ghosts.mode becomes scared and pill becomes deleted
rules done
logic.rules.each {println(it)}
on(start, setValue(ghosts.mode, normal))
on(ghost.hits(player), dies(player, null))
on(player.hits(pill), setValue(ghosts.mode, scared))
on(player.hits(pill), setValue(pill, deleted))
class Logic {
def rules = []
// ...
def at(time) {
changeEvent(time)
}
// ...
def then(object) {
changeObject(object)
}
}
def doItTwice(fn) {
fn()
fn()
}
doItTwice({println("d")})
def doItTwice(fn) {
fn()
fn()
}
doItTwice({println("d")})
d
d
def doItTwice(fn) {
fn()
fn()
}
doItTwice {
println("e")
}
def doItTwice(fn) {
fn()
fn()
}
doItTwice {
println("e")
}
e
e
dependencies {
compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.22'
}
// Implicit static imports of dependencies and compile
dependencies({
compile(["group": 'org.slf4j', "name": 'slf4j-api', "version": '1.7.22']);
});
pipeline {
stages {
stage('Build') {
steps {
echo "Building all the projects"
dir('sms/whist') {
catchError {
sh "make"
// Implicit static imports ...
pipeline({
stages({
stage('Build', {
steps( {
echo("Building all the projects")
dir('sms/whist', {
catchError( {
sh("make")
dontRunMe = {->
println("dontRunMe!")
"you ran me, didn't you?"
}
println(dontRunMe)
"dontRunMe=$dontRunMe"
dontRunMe = {->
println("dontRunMe!")
"you ran me, didn't you?"
}
println(dontRunMe)
"dontRunMe=$dontRunMe"
dontrunme1$_run_closure1@4690b489
dontRunMe = {->
println("dontRunMe!")
"you ran me, didn't you?"
}
println(dontRunMe)
"dontRunMe=$dontRunMe".toUpperCase()
dontRunMe = {->
println("dontRunMe!")
"you ran me, didn't you?"
}
println(dontRunMe)
"dontRunMe=$dontRunMe".toUpperCase()
dontrunme1$_run_closure1@4690b489
dontRunMe!
yoable = [yo:null]
def coolPrint(message) {
println(message)
yoable
}
coolPrint("s'up?")
yoable = [yo:null]
def coolPrint(message) {
println(message)
yoable
}
coolPrint("s'up?")
s'up?
yoable = [yo:null]
def coolPrint(message) {
println(message)
yoable
}
coolPrint("s'up?") yo
yoable = [yo:null]
def coolPrint(message) {
println(message)
yoable
}
coolPrint("s'up?") yo
s'up?