7 things you probably don’t know about Kotlin #7

Main.kt

// Main.java
public static void main(String[] args) {
    String name = null;

    Nullcheck.ifNull(name, new Function1<Object, Unit>() {
        @Override
        public Unit invoke(Object o) {
            return null;
        }
    });
}

// Any.kt
@file:JvmName("Nullcheck")
package ...

inline fun <T> T?.ifNull(function: (T?) -> Unit) {
    if (this == null) function(this)
}