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.
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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.
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 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 to get the value of null point in a map?
Its always prefer to check the null point and then use the map.get() values. Keep somthing like below,
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;.
What does the new mappings from fromMap replace?
The new mappings from fromMap replace any mappings that the original map had.
How to determine uniqueness of map keys?
Uniqueness of map keys of user-defined types is determined by the equals and hashCode methods, which you provide in your classes. Uniqueness of keys of all other non-primitive types, such as sObject keys, is determined by comparing the objects’ field values.
What is map2 argument?
The map2 argument is the map to compare this map with.
How to make a shallow copy of a map without duplicating the sObject records it contains?
To make a shallow copy of a map without duplicating the sObject records it contains, use the clone () method.
What is a map method?
The Map methods are all instance methods, that is, they operate on a particular instance of a map. The following are the instance methods for maps.
What is the operator of map1?
The == operator is equivalent to calling the equals method, so you can call map1.equals (map2); instead of map1 == map2;.
