Gradle - difference between ext {...} and ext['...'] in the buildScript section

Question

So for example

buildscript {

    ext {
        kotlinVersion = „1.3.50”
    }

    ext['tomcat.version'] = '9.0.56’
}

What exactly is the difference between those two? Cannot find it in the docs.

Answer 1

Its groovy access syntax map["age"] = 42 ; dot operator way map.city = "New York"

also explained in the docs https://docs.gradle.org/current/javadoc/org/gradle/api/plugins/ExtraPropertiesExtension.html