Groovier way to swap values : Groovy

Before making swapping fashionable, classy and exciting, or in other word “Groovier”.

Let see what we do with our traditional Java to swap 2 values. If we use Java way, we need a method that perform 3 step process of swapping the value including declaration of additional variable.

In Java, what we do :

int a=1, b=2, temp;

temp=a;

a=b;

b=temp;

println “a=${a}, b=${b}”

//Output : a=2, b=1

In Groovy, using closure make it more simpler :

def a=1, b=2;

def swap = {x,y → a=y; b=x;}

swap(a,b)

println “a=${a}, b=${b}”

//Output : a=2, b=1

Naaaaah! But still it's not classy or cool enough to be Groovier. Let go more Groovy like real real Groovy.

Being more Groovier, Aha! getting more excited to see magic and power of a Groovy :

def a=1, b=2;

(a,b)=[b,a]

//Output : a=2, b=1

Whoa! Wat was that do I just swap 2 values (a,b)=[b,a] and done all in single line. :D

So are you still on 80's, 90's coding style or planning to join 21^st Century... ;)

Hope it helps! ;)