how to iterate map salesforce

You can iterate a map by key or value: Key for (String key : m.keySet ()) { Object value = m.get (key); }

Full Answer

How to iterate through the contents of a map?

I don't think you can iterate through the contents of a Map directly. You can put the Map contents into a Set or List and then do your loop. Hope that helps.

Why is my map not working in Salesforce?

The code creating that Map has a bug in it - usually, this happens when you forget to create a new object instance in each iteration of a loop that's generating a nested data structure. Thanks for contributing an answer to Salesforce Stack Exchange!

Why can't I iterate over the keys of the inner map?

There's no reason to iterate over the keys of the inner Map. While you could make that work, you'd end up with a complex if / else or switch on statement inside the inner for loop. It's much easier to directly access the inner Map keys whose values you require.

How do I iterate through 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.

How do you iterate a map in lightning component?

Here you go….. In this apex class ,you have @AuraEnabled , fetchMapvalues() method which return type is Map type....Iterate map values in Salesforce Lightning component.Attribute NameTypeDescriptionitemsListRequired. The collection of data to iterate over.varStringRequired. The variable name to use for each item inside the iteration.2 more rows•Sep 15, 2018

How do I show 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...•

How do you iterate over a map in LWC?

We have used JavaScript to iterate the map and store that in an object array list. After we iterate that array list using the template in key and value in LWC. In Lightning Web Component (LWC) we use template for:each={mapData} for:item="mapKey" to iterate the list.

How do you use the map in lightning controller?

Case 2) Displaying map by using aura iteration.STEP 1) APEX Controller,STEP 2) Create a lightning component (name="mapIteration. ... STEP 3) mapIterationController.js. ... STEP 4) Create a lightning component name="mapIterationChild. ... STEP 5) mapIterationChildController.js.STEP 6) Application to run the above component.More items...•

How do you make a map in lightning JS?

Create the Account Map ComponentIn the Developer Console, select File > New > Lightning Component.Enter AccountMap as the name and click Submit.In the AccountMap. cmp tab, replace the contents with the following code. How do I use the map function in Salesforce?

How to use Map methods in SalesforceCreating a Map: Map variablename=new Map(); ... Different Methods in Map:put(key, value): It returns the value with given key in the map. ... clear(): It removes all the key-value mapping pairs from the map.get(key): ... keySet(): ... values(): ... size():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.

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...

How do I send a map from apex to LWC?

There are two ways to pass the custom type or complex data to apex from LWC.Sending Wrapper object to Apex. We can directly pass wrapper object to apex without any serialization and deserialization process. ... Send serialized string to Apex and deserialize it. ... Apex Code: ... References:

What is finaldataelementmap?

Your Map finaldataelementmap contains two references to the same child Map under different keys. The code creating that Map has a bug in it - usually, this happens when you forget to create a new object instance in each iteration of a loop that's generating a nested data structure.

Does the loop iterate over 629?

Now, Instead of iterating over values of both 629 and 630 , which has two different amounts, the loop is iterating over only key 629, multiple times. I suppose this is because when I print the finaldataelementmap, I see that the value for 630 is listed as "already output" instead of actual value