Question

How to find if key exist in map with Groovy

Answer 1

def map = [name: "Groovy", age: 13, country: "United States", city: "New York"]
 
def f = map.find{it.key  == "name"}?.value
println f

f = map.find{it.key == "abc"}?.value
println f
 
  
  
  
/*
run:
  
Groovy
null
  
*/

 

70+ SQL courses for beginners and professionals

Answer 2

def map = [name: "Groovy", age: 13, country: "United States", city: "New York"]
 
def key = "name"

if(map[key]) {
    println map[key]
}
 
  
  
  
/*
run:
  
Groovy
  
*/

 

70+ SQL courses for beginners and professionals

Answer 3

def map = [name: "Groovy", age: 13, country: "United States", city: "New York"]
 
def key = "name"
def f = map[key] ?: "not found"
println f

key = "abc"
f = map[key] ?: "not found"
println f
 
  
  
  
/*
run:
  
Groovy
not found
  
*/

 

70+ SQL courses for beginners and professionals

Answer 4

def map = [name: "Groovy", age: 13, country: "United States", city: "New York"]

println(map.containsKey("name")); 

println(map.containsKey("abc")); 
 

   
   
/*
run:
   
true
false
   
*/

 

70+ SQL courses for beginners and professionals