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 key in Salesforce?
Map keys and values can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Uniqueness of map keys of user-defined types is determined by the equals and hashCode methods, which you provide in your classes.
How to get the value of a key in a map?
You could also use the "keySet ()" method to iterate over keys in the map and fetch the value. Ma<String,Account> mapAccounts = new Map<String,Account> ();for (String key:mapAccounts.keySet ()) { System.debug (mapAccounts.get (key));}
How to select a field from an object in Salesforce?
In salesforce we cannot use "Select * from".If you dont know about fields in the aaccount object. Then Go for dynamic Soql.In Schema class there is get describe () method to get fields from the object dynamically.Use it according to your requirement.
How to get the value of a string from a map?
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.
How do I find the value of a map in Salesforce?
How to use Map methods in SalesforceCreating a Map: Map
What is values () in map in Salesforce?
remove(key) This method removes the mapping for the specified key from the map, if present, and returns the corresponding value. size() Returns the number of key-value pairs in the map. values() This method returns a list which contains all the values in the map. The values are returned in an arbitrary order.
Can we get key from value in map Salesforce?
You could loop through the values until you find the value, then use the index to get the Key from the keyset.
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 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 is keySet () in SalesForce?
keyset() Returns a set that contains all of the keys in the map. example:- Map
How do I iterate a map in SalesForce?
There are many methods that can be used 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.
What is containsKey in SalesForce?
Makes a duplicate copy of the map. containsKey(key) Returns true if the map contains a mapping for the specified key. deepClone() Makes a duplicate copy of a map, including sObject records if this is a map with sObject record values.
What is map collection 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.
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 add a value to a map in Salesforce?
If you want to add a map onto existing map, use putAll() method. finalMap. get('DETAILS'). putAll(subDetails);
How to tell if two maps are equal?
Two maps are equal if their key/value pairs are identical, regardless of the order of those pairs. The == operator is used to compare the map keys and values. The == operator is equivalent to calling the equals method, so you can call map1.equals (map2); instead of map1 == map2;.
Is a map key case sensitive?
Map keys of type String are case-sensitive. Two keys that differ only by the case are considered unique and have corresponding distinct Map entries. Subsequently, the Map methods, including put, get, containsKey, and remove treat these keys as distinct. For more information on maps, see Maps. Map Constructors.
