Groovy: List: every(): Return true if all the elements in the list matches to given criteria

Groovy provides every method, it returns true, if all the elements in the list matches to given criteria, else false.

public boolean every(Closure predicate)

Determine if the given predicate closure is valid for all the elements of the list.

HelloWorld.groovy

evenNumbers = [2, 4, 6, 8]
numbers = [0, 1, 2, 3, 4, 5]

isAllevenNumbers1 = evenNumbers.every { it % 2 == 0}
isAllevenNumbers2 = numbers.every { it % 2 == 0}

println "Is evenNumbers contain all the even numbers : $isAllevenNumbers1"
println "Is numbers contain all the even numbers : $isAllevenNumbers2"

Output

Is evenNumbers contain all the even numbers : true

Is numbers contain all the even numbers : false

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