What is Apex repeat?

Posted by Florance Siggers on Saturday, October 15, 2022
apex:repeat is an iteration component that allows you to output the contents of a collection according to a structure that you specify. The collection can include up to 1,000 items.

Similarly, it is asked, what is the difference between pageBlockTable and dataTable?

apex:pageBlockTable represents a table formatted and styled to look like a related list table. apex:dataTable is an unstyled table suitable for use anywhere outside of a apex:pageBlock (but may be used within one).

Beside above, what are apex variables? A variable is defined by the combination of an identifier, a type, and an optional initializer. In addition, all variables have a scope, which defines their visibility, and a lifetime. Declaring a Variable :- In Apex all variables must be declared before they can be used. The basic form of a variable.

Also Know, what is Apex attribute?

apex:attribute. A definition of an attribute on a custom component. The attribute tag can only be a child of a component tag. Note that you cannot define attributes with names like id or rendered. These attributes are automatically created for all custom component definitions.

What is the use of Facet in salesforce?

apex:facet. A placeholder for content that's rendered in a specific part of the parent component, such as the header or footer of an <apex:dataTable> . An <apex:facet> component can only exist in the body of a parent component if the parent supports facets.

What is Rerender in Salesforce?

ReRender : Rerender is used to refresh a particular section of the visualforce page. We have to just mention the id of the page section (in the Rerender attribute) that needs to be refreshed.

What is the difference between action function and action support?

Action support adds AJAX support to another visualforce component and then call the controller method. Action function cannot add AJAX support to another component. But from a particular component which has AJAX support(onclick, onblur etc) action function can be called to call the controller method.

How do you create Visualforce Components?

To create a Visualforce custom component:
  • In Salesforce from Setup, enter Components in the Quick Find box, then select Visualforce Components.
  • Click New.
  • In the Label text box, enter the text that should be used to identify the custom component in Setup tools.

    • What are Aura attributes?

    An aura attribute is like a variable that we use in programming language or in Apex class. These are typed fields and set on a specific instance of a component. These attributes can be used inside the component as expressions and in controller and helper as well.

    What are the Visualforce Components?

    Visualforce components are small, reusable pieces of functionality—think widgets, panels, user interface elements, that kind of thing—that you use in Visualforce page markup. You can use standard Visualforce components, and create your own custom components.

    What is a benefit of using a trigger framework?

    These are some of the benefits of using an activation framework: Eliminating activation logic greatly facilitates the testing and maintenance of the unit. Normalization of the trigger means that all triggers work consistently. One trigger per object provides full control over the order of execution.

    What are custom components in Salesforce?

    Creating and Using Custom Components. Salesforce provides a library of standard, pre-built components, such as <apex:relatedList> and <apex:dataTable> , that can be used to develop Visualforce pages. In addition, you can build your own custom components to augment this library.

    What is apex component in Salesforce?

    apex:component. A custom Visualforce component. All custom component definitions must be wrapped inside a single <apex:component> tag. This component supports HTML pass-through attributes using the "html-" prefix.

    What is Apex page?

    apex:page. A single Visualforce page. All pages must be wrapped inside a single page component tag. This component supports HTML pass-through attributes using the "html-" prefix. Pass-through attributes are attached to the generated <html> tag.

    How do I use components in Visualforce page?

    Use Lightning Components in Visualforce Pages
  • Add the Lightning Components for Visualforce JavaScript library to your Visualforce page using the <apex:includeLightning/> component.
  • Create and reference a Lightning app that declares your component dependencies.
  • Write a JavaScript function that creates the component on the page using $Lightning. createComponent() .

    • How do I use the Visualforce component in Salesforce?

    First we will create visualforce component. Go to Setup -> Develop -> Components -> then write component name. In our case component name is 'myComponent'. This component is creating two attributes using <apex:attribute> tag.

    Whats is variable?

    A variable is a named unit of data that may be assigned a value. Some variables are mutable, meaning their values can change. Other variables are immutable, meaning their value, once assigned, cannot be deleted or altered. If a variable's value must conform to a specific data type, it is called a typed variable.

    How do you declare a variable in Apex class?

    To declare a variable, specify the following:
  • Optional: Modifiers, such as public or final , as well as static .
  • Required: The data type of the variable, such as String or Boolean.
  • Required: The name of the variable.
  • Optional: The value of the variable.

    • What are primitive data types in Apex?

    Primitive Data types in Apex. There are different types of primitive data types like integer,double,long,decimal,boolean,Id,Blob,Date,Time, Datetime etc.

    What is an accurate statement about variable scope in Salesforce?

    A few accurate statements about variable scopes would be that sub-blocks cannot reuse a parent block's variable name, parallel blocks can use the same variable name, and a variable can be defined at any point in a block.

    What are variables sociology?

    Variables are properties or characteristics of some event, object, person, place or thing that are measurable and can take on more than one value, or vary.

    Which three methods help ensure quality data in Salesforce?

    Following are the declarative method that helps to ensure quality data:
    • Workflow alerts.
    • Lookup filters.
    • Validation rules.

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