how to iterate over a map in salesforce

These methods are available for all maps. So one way to code it is to use a keySet () method of the Map. Firstly you will get all Id's (keys) from the map and then will iterate over that set of keys.

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 loop through a map in Salesforce?

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 you run a map loop in Apex?

“loop through map apex” Code Answerfor (Id key : Map. keySet()) {// The "key" variable is also available inside the loop.List list = Map. get(key);// logic.}

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 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 iterate through strings in Apex?

You can do two ways to iterate a List in apex. Here is an advance way to loop on a list. List stringList = new List{'sample1', 'sample2'}; for (String str : stringList) system. debug(str);

Which of the following statements can be used to iterate through a map variable?

keyset(): A keySet() method of HashMap class is used for iteration over the keys contained in the map.

How do I convert a map value to a list?

Java program to convert the contents of a Map to listCreate a Map object.Using the put() method insert elements to it as key, value pairs.Create an ArrayList of integer type to hold the keys of the map. ... Create an ArrayList of String type to hold the values of the map. ... Print the contents of both lists.

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...•

How do I use maps in Salesforce?

0:266:25Salesforce Tutorial Video | Salesforce Maps - YouTubeYouTubeStart of suggested clipEnd of suggested clipTo access Salesforce Maps once it has been installed all you have to do is go to the Salesforce MapsMoreTo access Salesforce Maps once it has been installed all you have to do is go to the Salesforce Maps app or tap.

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.