Map<Id, Opportunity> opportunityMap = new Map<Id, Opportunity> ([select id,Name,YuMe_Transaction_number__c from Opportunity where Id in : LstId]); Then now remove for loop form line 23 and replace it with below code. Opportunity opp = opportunityMap.get (cs.Opportunity__c); if (opp == null) { continue; }
Full Answer
What are keys and values in Salesforce map?
Keys and values can be any data types. In salesforce, we have standard object Account, If we want to map id with account, it is represented as, It returns the value with given key in the map.
How to map id with account in Salesforce?
In salesforce, we have standard object Account, If we want to map id with account, it is represented as, It returns the value with given key in the map. for values: {shirt, tshirt, shirt}.
Should I manually loop over a list to populate a map?
However, it turns out that manually looping over a List to populate a Map isn’t always the best way to use your precious CPU miliseconds. If you are sure that your every member of your List<YourSObject> will have a non-null Id attribute, then you can use a shortcut Apex command that runs faster than a manual loop:
Is it good/best practice to use nested for loops in apex?
Its not Good/Best practice to use nested for loops in apex code.We may end up with this error: System.LimitException: Apex CPU time limit exceeded. To avoid this use maps.
Does map replace for loop?
map generates a map object, for loop does not return anything. syntax of map and for loop are completely different. for loop is for executing the same block of code for a fixed number of times, the map also does that but in a single line of code.
How do I loop through a map in Salesforce?
One method in particular can be used to loop through a map in Apex, this method is keySet(). The keyset method returns all of the keys in the map and you can access the value associated with the key inside a loop.
How do I use the map function in Salesforce?
How to use Map methods in SalesforceCreating a Map: Map
Can we insert map in Salesforce?
Use myMap. values() to "flatten" the map into a List (in your case list of accounts), insert the whole list. Such flattening just keeps references so the original accounts in the map will be silently updated with the generated record Id.
How do you iterate a map in lightning component?
Here you go….. In this apex class ,you have @AuraEnabled , fetchMapvalues() method which return type is Map type....Iterate map values in Salesforce Lightning component.Attribute NameTypeDescriptionitemsListRequired. The collection of data to iterate over.varStringRequired. The variable name to use for each item inside the iteration.2 more rows•Sep 15, 2018
How do I show map values in SalesForce?
Apex Map In SalesForceLog into your Salesforce account and click the "Developer Console".The general syntax for Apex Map is, ... Next, we can add some predefined important methods like put(key, value), get(key), keySet(), values(), size(), clone(), and clear() to the Apex Map.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...
What is field mapping in Salesforce?
When you subscribe to a field in Salesforce to Salesforce, you map it to a field in your org. This mapping syncs updates between the fields for all shared records. Before you map fields, look at these important best practices.
How does map work in Apex?
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.
How do I assign a map to a list in Salesforce?
Converting List to Map://Converting list to map.Map
Can map have duplicate keys in Salesforce?
Features of Map KEY can't be duplicate like SET. VALUE can be duplicate like LIST. We can have keys or values of any data type (eg: string, integer, etc).
Can map have duplicate keys?
Duplicate keys are not allowed in a Map. Basically, Map Interface has two implementation classes HashMap and TreeMap the main difference is TreeMap maintains an order of the objects but HashMap will not.
The problem
We just started leveraging Salesforce’s EDA / HEDA package’s TDTM (table-driven trigger management) framework for controlling the flow of triggers we add to our org.
The fast way
If you are sure that your every member of your List<YourSObject> will have a non-null Id attribute, then you can use a shortcut Apex command that runs faster than a manual loop:
Performance comparison
I made a little unit test, MiscUnitTest to be sure I wasn’t imagining things:
Takeaway
Moral of the story: if you need a Map of SObject records from a List of them and want to use Id as the key, don’t build the loop by hand.
Creating a Map
In salesforce, we have standard object Account, If we want to map id with account, it is represented as,
get (key)
It returns the value to which the key is mapped, or it generates null if the key has no value.
