Case insensitive ConcurrentHashMap

Go uses Unicode for strings, not ASCII. They asked for a case-insensitive map .

Map. containsKey() method is used to check whether a particular key is being mapped into the Map or not . It takes the key element as a parameter and returns True if that element is mapped in the map. Syntax: boolean containsKey(key_element)

Map keys of type String are case-sensitive . Two keys that differ only by the case are considered unique and have corresponding distinct Map entries. Subsequently, the Map methods, including put , get , containsKey , and remove treat these keys as distinct.