You can get the value from map if you use get method in Map. mapname.get (string) ==> will return all the fileds mapname.get (string).FieldName; ==> will return particular filed.
Full Answer
What is a map in Salesforce?
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. This table represents a map of countries and currencies: Map keys and values can contain any collection, and can contain nested collections.
How many types of collections are there in Salesforce?
“ Collections are same like an array ” - We have 3 types of collections in Salesforce, and they are: List. Set. Map. How to create a Map and save information about Mobile Brand Name and Price?
How to manage the Recycle Bin in Salesforce classic?
Review Recycle Bin. If the record is visible in the Recycle Bin, select that item and click Undelete to restore it, review View, Restore, and Manage the Recycle Bin in Salesforce Classic. If there are too many records to undelete manually in the Recycle Bin, you may be able to use Workbench, review Restore multiple records that are in recycle bin.
What are keys and values in Salesforce?
Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. This table represents a map of countries and currencies:
How do I find the map value 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...•
Can we use map in SOQL query?
When working with SOQL queries, maps can be populated from the results returned by the SOQL query. The map key must be declared with an ID or String data type, and the map value must be declared as an sObject data type. This example shows how to populate a new map from a query.
How do I use GET method in Salesforce map?
How to use Map methods in SalesforceCreating a Map: Map
What is values () in map in Salesforce?
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.
What is the advantage of writing SOQL using map?
It is useful to understand how to reduce the number of executed code statements so that we can stay within the governor limits. Normally we get list of records in a SOQL query. Sometime we also need set of id's or map of record id's and record or list of record id's.
How do I iterate a map in Apex?
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 you find the value of a map?
HashMap get() Method in Java get() method of HashMap class is used to retrieve or fetch the value mapped by a particular key mentioned in the parameter. It returns NULL when the map contains no such mapping for the key.
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 map collection in Salesforce?
The 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 data type (integer, string), Collection, subject, user-defined.
How do I access map elements in Apex?
To access elements in a map, use the Map methods provided by Apex. This example creates a map of integer keys and string values. It adds two entries, checks for the existence of the first key, retrieves the value for the second entry, and finally gets the set of all keys.
Why do we use map in Salesforce?
This question was answered on the official Salesforce Developer forums here. A list is an ordered collection so use list when you want to identify list element based on Index Number. A map is a collection of key-value pairs where each unique key maps to a single value.
How do I add a record to a 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 many levels of nested collections can a map contain?
Map keys can contain up to only four levels of nested collections. To declare a map, use the Map keyword followed by the data types of the key and the value within <> characters. For example: You can use the generic or specific sObject data types with maps. You can also create a generic instance of a map.
What is a map 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.
Does Apex need to reference the algorithm?
Unlike Java, Apex developers do not need to reference the algorithm that is used to implement a map in their declarations (for example, HashMap or TreeMap ). Apex uses a hash structure for all maps.
Can you use map keys in the same order?
You can rely on the order being the same in each subsequent execution of the same code. However, we recommend to always access map elements by key. A map key can hold the null value. Adding a map entry with a key that matches an existing key in the map overwrites the existing entry with that key with the new entry.
Can you use generic data types with maps?
You can use the generic or specific sObject data types with maps. You can also create a generic instance of a map. As with lists, you can populate map key-value pairs when the map is declared by using curly brace ( {}) syntax. Within the curly braces, specify the key first, then specify the value for that key using =>.
Salesforce Collection of Map Module
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Collection-map with a sample program
Scenario: Add mobile brands with price lists and process them with step-by-step execution with collection functions. The below mentioned are 6 individual programs for adding mobile brand with price list via List.