Groovy: Insert elements into a map

There are two ways to insert elements into a map.

a.   Using put method

b.   Using subscript operator.

HelloWorld.groovy

def countryCapitals = ["India" : "new Delhi", "Australia" : "Canberra"]

countryCapitals.put("Bulgaria", "Sofia")
countryCapitals["Canada"] = "Ottawa"

countryCapitals.each { entry ->
    println "CountryName: $entry.key, Capital: $entry.value"
}

Output

CountryName: India, Capital: new Delhi

CountryName: Australia, Capital: Canberra

CountryName: Bulgaria, Capital: Sofia

CountryName: Canada, Capital: Ottawa

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