Groovy Tip 5: Arrays

The definition of an array and the initial value of an assignment

In the groovy language, arrays are defined in the same way as in the Java language.

def a = new String[4]
　　
　　def nums = newint[10]
　　
def objs = new Object[3]

And then the assignment is the same:

a[0] = 'a'
　　a[1] = 'b'
　　a[2] = 'c'
a[3] = 'd'

The difference is in assigning an initial value when the array is defined.

In the Java language, this is defined as an array of strings:

String[] strs = new String[]{'a','b','c','d'};

In the groovy language, it is necessary to define a string array:

def strs = ['a','b','c','d'] as String[]

Second, the array of traversal

In the groovy language, there are many ways to iterate an array, often using each method:

a.each{
　　　 println it
}

Of course, you can also use the enhanced for loop:

for(it in a)
　　{
　　　 println it
}

You can also use the following traversal method:

(0..<a.length).each{
　　　 println a[it]
}