What is key in map Salesforce?

A map is a collection of key-value pairs where each unique key maps to a single value . Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Map keys and values can contain any collection, and can contain nested collections.

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Is TreeMap case-insensitive?

Also, TreeMap uses a Comparator to find if an inserted key is a duplicate or a new one. Therefore, if we provide a case-insensitive String Comparator, we’ll get a case-insensitive TreeMap . which we can supply in the constructor: Map<String, Integer> treeMap = new TreeMap<>(String.26 May 2020

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What is map containsKey?

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)

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