Groovy: Map: find: Find the first element that matches to given closure

public Object find(Closure closure)

This method finds and return the first value that matches to given closure. This method returns null, if nothing is matched to the closre criteria.

Example

result = employees.find {it.key == 3}

result = employees.find {it.value.name == 'Krishna'}

HelloWorld.groovy

class Employee{
 String name
 int age
 int id
 
 public Employee(int id, int age, String name){
  this.id = id
  this.age = age
  this.name = name
 }
 
 String toString(){
  return "id : ${this.id}, age : ${this.age}, name : ${this.name}"
 }
}

Employee emp1 = new Employee(1, 32, 'Sunil')
Employee emp2 = new Employee(2, 29, 'Krishna')
Employee emp3 = new Employee(3, 41, 'Gopi')
Employee emp4 = new Employee(4, 35, 'krishna')

employees = [
 1 : emp1,
 2 : emp2,
 3 : emp3,
 4 : emp4
]

println "Get an employee with id 3"
def result = employees.find {it.key == 3}
println "${result.value}"

println "\nGet an employee with name 'Krishna'"
result = employees.find {it.value.name == 'Krishna'}
println "${result.value}"

Output

Get an employee with id 3

id : 3, age : 41, name : Gopi

Get an employee with name 'Krishna'

id : 2, age : 29, name : Krishna

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