How do I check if an element is in a set apex?
I wrote a method last night that creates a new custom object record that is related to an Account and a User. it works great however, it breaks when there is an already existing record for a user. After research I think I need a set to compare if the user value already exists then not run the logic.
I can't get the syntax right to compile and see if it works. Example code:
public static void createNPDAccountTeam(MapaccOwner) {
ListnpdAccTeamToInsert = new List Set(); existingAccTeam = new Set existingAccTeam.addAll([SELECT Id, User__c, Account__c FROM NPD_Account_Team__c WHERE Account__c IN: accOwner.keySet()]);();
for(Id accId : accOwner.keySet())
{
if(!existingAccTeam.contains(accId.User__c)
{
npdAccTeamToInsert.add(new NPD_Account_Team__c(
Account__c = accId,
User__c = accOwner.get(accId),
Role__c = 'Custom',
Team_Member_Status__c = 'Active'
));
}
}
insert npdAccTeamToInsert;
}
I get the error on line 10:
Unexpected token '{'
What am I doing wrong? I know that it does not need a ; at the end of the if line but I am not sure why it will not save.
To check if an element is in set apex, please close the if condition with extra parens.
if(!existingAccTeam.contains(accId.User__c))
{
}
Answers (2)
In Apex, checking if an element exists in a Set is straightforward, as the Set collection type provides an efficient contains() method. Here’s how you can do it:
1. Using contains() Method (Best Approach)
The contains() method checks if a given value exists in the set.
Example:
Set mySet = new Set{'Apple', 'Banana', 'Cherry'};
if (mySet.contains('Banana')) {
System.debug('Banana is in the set!');
} else {
System.debug('Banana is NOT in the set!');
}
This approach is case-sensitive for String values.
2. Handling Case-Insensitive Checks
Convert values to lowercase before checking:
if (mySet.contains('banana'.toLowerCase())) {
System.debug('Found in set (case-insensitive check)');
}
3. Checking for Numbers or Custom Objects
Works the same way with numbers:
Set numSet = new Set{1, 2, 3, 4};
Boolean exists = numSet.contains(3); // Returns true
For custom objects, override equals() and hashCode() if needed.
4. Alternative: Convert to List (Less Efficient)
If needed, convert the set to a list and use contains():
List myList = new List(mySet);
Boolean found = myList.contains('Apple');
Using contains() is the best and most efficient way to check for elements in a set in Apex.
1 Month
In Salesforce Apex, checking if an element is in a set is straightforward using the contains method provided by the Set class. This method returns a Boolean value indicating whether the specified element exists in the set.
Example Usage
Below are detailed steps and examples to demonstrate how you can check if an element is in a set in Apex.
Step-by-Step Example:
Create a Set
First, create a set and add some elements to it.
Set fruits = new Set{'Apple', 'Banana', 'Orange'};
Check If an Element Exists in the Set
Use the contains method to check if a specific element is in the set.String fruitToCheck = 'Banana';
Boolean isPresent = fruits.contains(fruitToCheck);
if (isPresent) {
System.debug(fruitToCheck + ' is in the set.');
} else {
System.debug(fruitToCheck + ' is not in the set.');
}ull Example in an Apex Class
Here is a complete example within an Apex class:public class SetExample {
public static void checkElementInSet() {
// Create a set and add elements to it
Set fruits = new Set{'Apple', 'Banana', 'Orange'};
// Element to check
String fruitToCheck = 'Banana';
// Check if the element is in the set
Boolean isPresent = fruits.contains(fruitToCheck);
// Output the result
if (isPresent) {
System.debug(fruitToCheck + ' is in the set.');
} else {
System.debug(fruitToCheck + ' is not in the set.');
}
}
}
Testing the Code
To test the code, you can call the checkElementInSet method from the Developer Console:
SetExample.checkElementInSet();
10 Months
In Apex, checking if an element exists in a Set is straightforward, as the Set collection type provides an efficient contains() method. Here’s how you can do it:
1. Using contains() Method (Best Approach)
The contains() method checks if a given value exists in the set.
Example:
Set mySet = new Set{'Apple', 'Banana', 'Cherry'};
if (mySet.contains('Banana')) {
System.debug('Banana is in the set!');
} else {
System.debug('Banana is NOT in the set!');
}This approach is case-sensitive for String values.
2. Handling Case-Insensitive Checks
Convert values to lowercase before checking:
if (mySet.contains('banana'.toLowerCase())) {
System.debug('Found in set (case-insensitive check)');
}3. Checking for Numbers or Custom Objects
Works the same way with numbers:
Set numSet = new Set{1, 2, 3, 4};
Boolean exists = numSet.contains(3); // Returns trueFor custom objects, override equals() and hashCode() if needed.
4. Alternative: Convert to List (Less Efficient)
If needed, convert the set to a list and use contains():
List myList = new List(mySet);
Boolean found = myList.contains('Apple');Using contains() is the best and most efficient way to check for elements in a set in Apex.
In Salesforce Apex, checking if an element is in a set is straightforward using the contains method provided by the Set class. This method returns a Boolean value indicating whether the specified element exists in the set.
Example Usage
Below are detailed steps and examples to demonstrate how you can check if an element is in a set in Apex.
Step-by-Step Example:
Create a Set
First, create a set and add some elements to it.
Set fruits = new Set{'Apple', 'Banana', 'Orange'};
Check If an Element Exists in the Set
Use the contains method to check if a specific element is in the set.String fruitToCheck = 'Banana';
Boolean isPresent = fruits.contains(fruitToCheck);if (isPresent) {
System.debug(fruitToCheck + ' is in the set.');
} else {
System.debug(fruitToCheck + ' is not in the set.');
}ull Example in an Apex Class
Here is a complete example within an Apex class:public class SetExample {
public static void checkElementInSet() {
// Create a set and add elements to it
Set fruits = new Set{'Apple', 'Banana', 'Orange'};
// Element to check
String fruitToCheck = 'Banana';
// Check if the element is in the set
Boolean isPresent = fruits.contains(fruitToCheck);
// Output the result
if (isPresent) {
System.debug(fruitToCheck + ' is in the set.');
} else {
System.debug(fruitToCheck + ' is not in the set.');
}
}
}Testing the Code
To test the code, you can call the checkElementInSet method from the Developer Console:
SetExample.checkElementInSet();