how to compare two maps in salesforce

Map<String, Object2__c> object2ByPear = new Map<String, Object2__c> (); for (Object2__c record2 : records2) { object2ByPear.put (record2.Pear__c, record2); } Then you can loop through a list of records1 and compare using the object2ByPear map.

Full Answer

How do I compare map values in Salesforce?

The correct way to compare maps for value-equality is to:Check that the maps are the same size(!)Get the set of keys from one map.For each key from that set you retrieved, check that the value retrieved from each map for that key is the same (if the key is absent from one map, that's a total failure of equality)

How do I compare values in two maps?

We can compare two HashMap by comparing Entry with the equals() method of the Map returns true if the maps have the same key-value pairs that mean the same Entry....In java. util package HashMap class is present.Compare Entry.Compare Keys.Compare Values.

What is values () in map in Salesforce?

size() Returns the number of key-value pairs in the map. values() This method returns a list which contains all the values in the map.

How do I add one map to another map in Salesforce?

map2 = (); if map1 and map2 contain same key with different values....First loop through first map.Add all element of first map.check if key exist in second map , if exist add second map element in first map loop.loop thrugh second map and add those element which are not in first map.

How do you compare two maps with their keys?

If we want to compare hashmaps by keys i.e. two hashmaps will be equals if they have exactly same set of keys, we can use HashMap. keySet() function. It returns all the map keys in HashSet. We can compare the hashset of keys for both maps using Set.

What is MAP getOrDefault?

The Java HashMap getOrDefault() method returns the specified default value if the mapping for the specified key is not found in the hashmap. Otherwise, the method returns the value corresponding to the specified key. The syntax of the getOrDefault() method is: hashmap.get(Object key, V defaultValue)

How do I use the map function in Salesforce?

How to use Map methods in SalesforceCreating a Map: Map variablename=new Map(); ... Different Methods in Map:put(key, value): It returns the value with given key in the map. ... clear(): It removes all the key-value mapping pairs from the map.get(key): ... keySet(): ... values(): ... size():More items...•

What are the methods of map in Salesforce?

Map Methodsclear() Removes all of the key-value mappings from the map.clone() Makes a duplicate copy of the map.containsKey(key) Returns true if the map contains a mapping for the specified key.deepClone() ... equals(map2) ... get(key) ... getSObjectType() ... hashCode()More items...

How do I use maps in Salesforce?

0:266:25Salesforce Tutorial Video | Salesforce Maps - YouTubeYouTubeStart of suggested clipEnd of suggested clipTo access Salesforce Maps once it has been installed all you have to do is go to the Salesforce MapsMoreTo access Salesforce Maps once it has been installed all you have to do is go to the Salesforce Maps app or tap.

How do I use Apex map in SalesForce?

To declare a map, use the Map keyword followed by the data types of the key and the value within <> characters. For example: Map country_currencies = new Map(); Map> m = new Map>(); You can use the generic or specific sObject data types with maps.

What is map collection in SalesForce?

The 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 data type (integer, string), Collection, subject, user-defined.

How do I add values from one map to another in Apex?

Once you have instantiated a map, you can add values to the map simply by using the put() method. However, if you happen to have a list of sObjects you can just pass that list in the constructor like so: Map accountsById = new Map(listOfAccounts);