You can assign the value of list to set by using predefine methods of Set. List<string> fruits = new List<string> {'mango','papaya','orange','mango'}; Set<String> setFruits = new Set<String> (); setFruits.addAll (fruits); Please let me know if this helps you! April 25, 2016
Full Answer
How to use set in Salesforce?
How to use Set in Salesforce. Set is a collection of similar elements, and they are unordered. Elements can be of any data type. Set doesn't allow any duplicate values. We can't access a set element at a specific index, and we can only iterate over set elements. Set<DataType> variable name=new Set<DataType>();
What is a list in Salesforce?
A List is an ordered collection of elements that are distinguished by their indices. List elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
How to create a list in Salesforce apex?
A list can contain up to four levels of nested collections inside it, that is, a total of five levels overall. To declare a list, use the List keyword followed by the primitive data, sObject, nested list, map, or set type within <> characters. For example: To access elements in a list, use the List methods provided by Apex.
What are sets and maps in Salesforce apex?
Sets aren’t used as often in Apex – they’re basically lists however they’re unordered and don’t allow any duplicate values. Don’t worry about Sets for now! Maps are the final type of collection and they’re actually extremely powerful.
What is list Set in Salesforce?
A List is an ordered collection of elements that are distinguished by their indices. List elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Whereas, Set is an unordered collection of elements that do not contain any duplicates.
What is Set map list in Salesforce?
MapsCollection TypeDescriptionListAn ordered group of items of the same type. Each item has an index number that represents its position in the list.SetAn unordered group of unique items of the same type.MapA collection of key-value pairs. Each unique key maps to a single value.
How do I add a list to a Set in Salesforce?
You can assign the value of list to set by using predefine methods of Set. List
What is the use of get Set in Salesforce?
The "get" method is used to pass data from your Apex code to your Visualforce page.. In our example we are not passing any value.. hence, when your page loads initially the textbox will have a empty value. Set methods are used to assign a new value to the property.
What is difference between list set and map in Salesforce?
The list is a type of ordered collection that maintains the elements in insertion order, Set is a type of unordered collection and Map is a collection of key-value pairs.
How do I find 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 is SObject in Salesforce?
Sobjects are standard or custom objects that stores record data in the force.com database. There is also SObject datatype in apex that is the programmatic representation of these SObjects. Developers referes to SObject and their fields by their API names.
Can we add Set to list in Apex?
Converting from a List to Set, can be done using the set's constructor. List
What is list list SObject in Salesforce?
Lists of sObjects can be used for bulk processing of data. You can use a list to store sObjects. Lists are useful when working with SOQL queries. SOQL queries return sObject data and this data can be stored in a list of sObjects.
What is setter method in Salesforce?
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.
What are setter and getter methods?
The getter method returns the value of the attribute. The setter method takes a parameter and assigns it to the attribute. Getters and setters allow control over the values. You may validate the given value in the setter before actually setting the value.
What is Apex property?
Apex property is similar to a variable, they can validate data before a change is made; they can prompt an action when data is changed, such as altering the value of other member variables; or they can expose data that is retrieved from some other source, such as another class.
What is a list in data?
A list is an ordered collection of elements that are distinguished by their indices. List elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
How many levels can a list contain?
A list can contain up to seven levels of nested collections inside it, that is, up to eight levels overall. To declare a list, use the List keyword followed by the primitive data, sObject, nested list, map, or set type within <> characters. For example: // Create an empty list of String.
How to get specific elements of a list?
Since Lists are ordered, you can get specific elements of your List by the element’s index, or, List position . Indexes start at zero and go all the way up to number of records in your list, minus one! So if you wanted to get specific elements of your List, you could do this using brackets:
Why are SOQL lists important?
Lists are the first and most important of the three data types: The reason why Lists are so important is because the output of every SOQL query is a List.
What is the difference between a set and a list?
The fundamental differences between sets and lists is that a Set is unordered and unique. To access elements in a set, you must iterate through all of the items. So, you can not do code like this: Instead, your code must do something like this: For a list, either method would be perfectly acceptable.
Can you use sets in Apex?
As many Salesforce Apex programmers know, in Salesforce it’s pretty much an unchallenged best practice that all code should be able to handle bulk inserts, updates, etc. When adhering to this best practice, it’s really common to use sets, or list s as parameters in functions. Sometimes, there’s a need to convert between lists, or sets, or maybe even maps.
What is an Apex list?
As you already learned, a list is an ordered collection of items with the same data type. Each item has a position called an index. This makes it easy to retrieve items in the list by the numbered index. But Apex collections are more than just lists. The other two types of collections are sets and maps.
What is a set in a collection?
Until now, you’ve created one type of collection, a list. A set is an unordered set of unique items of the same type. Similar to a list, a set is a group of items, called elements, and all elements have the same data type, such as string, integer, or even Account.
