How Important is to Know About the Map in Salesforce in 2023?

Introduction

In the world of CRM platforms, Salesforce leads the chart. Spending in CRM will be around US$ 670 billion in 2022. Salesforce forms 19.5% of the global CRM market share. Now, when you start learning about Salesforce, you will come across the term Salesforce Map Class. But you must have wondered what it is exactly, right? 

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We are here with a complete guide on Salesforce Map Class which you should not miss!

So why wait? Let’s scroll down till the end into a holistic learning experience about map methods in Salesforce.

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Salesforce Map Class - What Is a Map in Salesforce?

The Salesforce Map Class is a collection of Map methods in Salesforce. These are all instance methods, that is, they operate on a particular instance of a map.

The following are the instance methods for maps:

Salesforce Map Class Features

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• A map is a collection of key-value pairs where each unique key maps to a single value. Map keys can be any primitive data type like string, integer,decimal, Id while values can be a primitive, sObject, collection type or an Apex object.
• Map Class keys and values can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
• Map keys of type String are case-sensitive. Map methods, including put, get, containsKey, and remove treat these keys as distinct.
• The Salesforce Map gives value on the basis of the key.
• Key is always unique but a value can be duplicated.

Salesforce Map Class Constructors

The following are constructors for Map.

• Map() - In the Map Class, this constructor creates a new instance of the Salesforce Map. T1 is the data type of the keys and T2 is the data type of the values.
• Map(mapToCopy) - This constructor generates a new instance of the Salesforce Apex Map Class. It initializes it just by copying the specified map entries. T2 is the data type of the values and T1 is known as the data type of the values.
• Map(recordList) - This Map Class constructor generates a new instance of the Map Apex class. Also, this constructor populates it with the sObject records’ passed-in list. The Map keys get populated with the IDs of sObject. Wherein, the values are known as sObjects.

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Salesforce Map Apex Class - Syntax

MapexMap= new map(); exMap.put(1,'James'); exMap.put(2,'Daniel'); exMap.put(3,'Peter'); string name= exMap.get(1); string name1= exMap.get(2); string name2= exMap.get(3); system.debug(name);//James system.debug(name1);//Daniel system.debug(name2);// Peter setkey= exmap.keyset(); listvalues=exmap.values(); system.debug(values);//James, Daniel, Peter

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Map Class Methods

The following are Apex Map methods. These are instance methods.

• clear(): Removes all of the key-value mappings from the map.
• clone(): Makes a duplicate copy of the map.
• containsKey(key): This Map Apex method returns true if the map contains - the  If the key is a string, the key value is case-sensitive.
• deepClone(): DeepClone () method creates a duplicate copy of a map, including sObject records if the map has sObject record values.
• equals(map2): It compares a map with a specified map and returns true if both maps are equal; otherwise, returns false.
• get(key): This method returns the value of the specified key which is mapped, or it returns null if the map contains no value for this key.
• getSObjectType(): This method returns the value of the sObject type in format of key and value.
• isEmpty(): If the Salesforce Apex Map has zero key-value pairs it returns true.
• keySet(): Returns a set that contains all of the keys in the map.
• put(key, value): Associates the specified value with the specified key in the map.
• putAll(fromMap): Copies all of the mappings from the specified map to the original map.
• putAll(sobjectArray): Adds the list of sObject records to a map declared as Map or Map.
• remove(key): This Map Class Salesforce method removes the mapping for the specified key from the map, if present, and returns the corresponding value.
• size(): Returns the number of key-value pairs in the map.
• values(): This method returns a list that contains all the values in the map. The values are returned in an arbitrary order.

get(key)

listmyAccounts = new list(); myAccounts = [Select ID, Name from Account limit 10]; mapmyAMap = new map(); for ( Account a : myAccounts ){ //Here putting account Id and name to map myAMap.put(a.ID, a.Name); } for ( ID aID : myAMap.keySet() ){ system.debug(loggingLevel.debug, myAMap.get(aID)); }

putAll(fromMap)

Map map1 = new Map(); map1.put('Red','LightRed'); Map map2 = new Map(); map2.put('Blue','DarkRed'); // Add map1 entries to map2 map2.putAll(map1); System.debug(map2.values());//(LightRed, 'DarkRed')

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remove(key)

MapcolorCodes = new Map(); colorCodes.put('Red', 'FF0000'); colorCodes.put('Blue', '0000A0'); colorCodes.put('Green', '0000A0'); System.debug('printing=== '+colorCodes);// Blue=0000A0, Green=0000A0, Red=FF0000 for(String key:colorCodes.keySet().clone()) { colorCodes.remove('Green'); system.debug(colorCodes);// Blue=0000A0, Red=FF0000 }

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Values ()

MapcolorCodes = new Map(); colorCodes.put('FF0000', 'Red'); colorCodes.put('0000A0', 'Blue'); List colors = new List(); colors = colorCodes.values(); system.debug(colors);//(Red, Blue)

getSObjectType()

Map acctMap = new map([select name from Account limit 10]); for(string accValue:acctmap.keyset()){ system.debug(acctmap.get(accValue)); }

Example - How to display records on the basis of alphabet?

Apex class public class DynamicSearchExample { public Map>accountsMap {get; set;}
 public List keys {get; set;} 
public String selectedKey {get; set;}
 public MapaccsByName {get; set;}
 public SetgetMapKeys(){ returnaccountsMap.keySet(); }
 publicDynamicSearchExample(){ accsByName=new Map(); ListsortedKeys=new List(); 
accountsMap=new Map>(); accountsMap.put('All', new List()); 
Listaccs=[select Name, industry,type,phone from Account order by Name asc]; 
for (Account acc : accs){ accountsMap.get('All').add(acc);
 String start=acc.Name.substring(0,1); ListaccsFromMap=accountsMap.get(start); 
if (null==accsFromMap){ accsFromMap=new List(); accountsMap.put(start,accsFromMap); } 
accsFromMap.add(acc); accsByName.put(acc.name,acc); } keys=new List(); 
for (String key : accountsMap.keySet()){ if(key != 'All'){ sortedKeys.add(key); } }
 sortedKeys.sort(); sortedKeys.add('All'); for (String key : sortedKeys){ keys.add(new SelectOption(key, key)); } selectedKey='All'; } } Visualforce page   data-mce-resize="false" data-mce-placeholder="1" class="mce-object" width="20" height="20" alt="[removed]" title="[removed]" />                         

Output

That’s it for now!

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Finally on Salesforce Map Class

The Salesforce Map Class is essential to use in Salesforce as it makes it easy for writing the bulk apex class or trigger. Learning about the various elements of Map Apex Class is advantageous for Salesforce users and professionals. Becoming a PRO in Salesforce can help software developers earn a whopping US$ 110,000 on average.

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