Groovy - List each(Closure closure) method

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Description

Groovy List each(Closure closure) method is used to iterate a items of the list while passing each item to the closure.

Syntax

public List each(Closure closure)

Parameters

closure − a closure applied on each element.

Return Value

Current List

Example - Iterating a List of Integers

Following is an example of the usage of this method −

main.groovy

def lst = [11, 12, 13, 14, 15]

lst.each { print it + " " }

Output

When we run the above program, we will get the following result −

11 12 13 14 15 

Example - Iterating a List of Strings

Following is an example of the usage of this method −

main.groovy

def lst = ["Apple","Mango","Orange","Papaya"]

lst.each { print it + " " }

Output

When we run the above program, we will get the following result −

Apple Mango Orange Papaya 

Example - Iterating objects of a List of Objects

Following is an example of the usage of this method −

main.groovy

def lst = [new Student(1, "Julie"),new Student(2, "Robert"),new Student(3, "Adam")];

lst.each { println it}

class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public boolean equals(Object obj) {
      Student s = (Student)obj;
      return this.rollNo == s.rollNo && this.name.equalsIgnoreCase(s.name);
   }
   
   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

When we run the above program, we will get the following result −

[ 1, Julie ]
[ 2, Robert ]
[ 3, Adam ]