How to get first element of set using Apex in Salesforce? August 29, 2014 InfallibleTechie Admin Sample Code: Set<String> setStr = new Set<String> {‘abc’, ‘xyz’}; String first = new List<String> (setStr).get (0); //returns abc
Full Answer
How to add an apex set in Salesforce?
Next, we can add the Apex Set with some predefined important methods like add (SetElement), addAll (fromList | fromSet), remove (element), removeAll (List | Set), Contains (Element), size () and isEmpty (). First Method is, add (SetElement) – using this method, we can insert an element into the Set.
How to debug the apex class in Salesforce?
For debugging the Apex class ApexSet. Click the Debug menu and select Open Execute Anonymous Window. Now, write the Apex code for calling Settest ()method, and enable the Open log option for viewing the output and click "Execute". Now, we can verify the output. After clicking "Execute", the log will open automatically and select Debug Only option.
What is set in Salesforce?
Set elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Set methods are all instance methods, that is, they all operate on a particular instance of a Set.
How do set methods work in Salesforce?
The Set methods work on a set, that is, an unordered collection of elements that was initialized using the set keyword. Set elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
How do you check if a Set contains an element in Apex?
1 AnswerDefine a new Set. Set
How do I find the Set value in Salesforce?
How to use Set in SalesforceSyntax:Creating a set: Set
Can we use Set in SOQL query?
Yes we can. Your code should work.
Can we use contains for Set in Apex?
You can use containsAll method of set only if you are comparing two sets equality.
Why do we use Set in Apex?
A set is an unordered collection of elements that do not contain any duplicates. Set elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Sets can contain collections that can be nested within one another.
How do I convert a Set to a string in SalesForce?
Converting Set into String Set
How do I add an element to a Set in Apex?
Set Methodsadd(setElement) Adds an element to the set if it is not already present.addAll(fromList) Adds all of the elements in the specified list to the set if they are not already present.addAll(fromSet) ... clear() ... clone() ... contains(setElement) ... containsAll(listToCompare) ... containsAll(setToCompare)More items...
What is get Set in Apex?
Setter method : This will take the value from the visualforce page and stores to the Apex variable name. getter method : This method will return a value to a visualforce page whenever a name variable is called.
How do I use SOQL in Apex?
To include SOQL queries within your Apex code, wrap the SOQL statement within square brackets and assign the return value to an array of sObjects. For example, the following retrieves all account records with two fields, Name and Phone, and returns an array of Account sObjects.
How do I get a substring in Apex class?
you can use, String concat = FirstName. substring(0,2) + LastName. substring(0,2);
How do I find a character in a string in Apex?
Apex String Methods to Determine Character TypesisAlpha() : This string method will return true, if the string contain only characters.isAlphaSpace() : This string method will return true, if the string contain alphabet and white spaces.More items...•
How do I check the value of a list in Apex?
mySet. addAll(myList);. You can now use the Set. contains() method to check the set for the element you're looking for.
addAll (fromList)
Adds all of the elements in the specified list to the set if they are not already present.
addAll (fromSet)
Adds all of the elements in the specified set to the set that calls the method if they are not already present.
containsAll (listToCompare)
Returns true if the set contains all of the elements in the specified list. The list must be of the same type as the set that calls the method.
containsAll (setToCompare)
Returns true if the set contains all of the elements in the specified set. The specified set must be of the same type as the original set that calls the method.
equals (set2)
Compares this set with the specified set and returns true if both sets are equal; otherwise, returns false.
removeAll (listOfElementsToRemove)
Removes the elements in the specified list from the set if they are present.
removeAll (setOfElementsToRemove)
Removes the elements in the specified set from the original set if they are present.
Lists
A list in Apex is analogous to an array in other programming languages that is it is an ordered list of items that can be referenced by their index. Lists can contain any data type, but they must have a defined data type. We declare a list in a similar way to declaring a new sObject.
Maps
Maps are a collection of key-value pairs that allow us to store a variety of data types using a key of any data type rather than an integer as an index. A map is a key-value pair that contains the unique key for each value. Both keys and values can be of any data type.
Conclusion
In this Salesforce tutorial, we have learned what are the three different types of collection in Apex are and how we can instantiate and use them.
About Salesforce
Salesforce is a cloud based online solution for customer relationship management, or CRM. Salesforce provides all of our departments like marketing, sales, commerce, and service with a shared view of our customers with a single integrated CRM platform.
Summary
Now, you have successfully tested the Apex Set and its methods in a SalesForce environment.
