Functions Component
  • 13 Feb 2023
  • 2 Minutes to read
  • Contributors
  • Dark
    Light
  • PDF

Functions Component

  • Dark
    Light
  • PDF

Article summary

Functions are a set of codes that can be called repeatedly for a particular operation.  The function is executed when something invokes it (calls it). In the EdgeReady Cloud, these functions are available as individual blocks. 

There are two types of functions: One that returns a value and one that does not return a value. 

In these blocks: 

  • Function parameters are listed inside the blocks in the function definition.
  • Function arguments are the values received by the function when it is invoked.
  • Inside the function, the arguments (the parameters) behave as local variables.

Create Function

This block helps users create new functions. The functions can be created:  

  • Without a Return Value
  • With a Return Value
  • As a Global Function or Local function
    • Global Function: Can be accessed in the behavior of other components within the same page only.
    • Local Function: Cannot be accessed outside the behavior of that specific component.
InputOutputBlock LayoutGenerated Code

Function Name (Text) -input-1, 

Click the settings icon;

Arguments Name (Text), 

Set Global Function checkbox,

 


This block will create a function definition based on input arguments and the choice of whether they are global.


 CreateFunction
var x1, x2;


function er_1673932286_change(e,obj,index){
   // Describe this function...
  window.GET = function (x1, x2) {
  };

}

Function Name (Text) -input-1, 

Click the settings icon;

Arguments Name (Text), 

allow statements checkbox

Set Global Function checkbox,

 


Creates a function with an output
CreateFunction-with Return
var x1, x2;


function er_3eff8d47_6dd5_4f07_92d0_fd3d291010bd_onPageShow(e,obj,index){
   // Describe this function...
  window.Get = function (x1, x2) {
    return 'Completed';
  };

}

Invoke Function

The Invoke Function occurs when: 

  • When an event occurs (when a user clicks a button)
  • When it is invoked (called) from another code block
  • Automatically (self invoked)

In the EdgeReady Cloud, the invoke function block is invoked in the following ways:

  • With Return Value
  • Without Return Value
  • As a Global Function
InputOutputBlock LayoutGenerated Code

Function Name (Text)

 Arguments - variable or any type value.

Note
Click the settings icon to add more arguments.



Calls the function definition using name and arguments with a return value


 InvokeFunc-with return-new 
window.name(e);

Function Name (Text)

 Arguments - variable or any type value.


Calls the function definition using name and arguments without a return value


InvokeFunc-without return-new

 window.test(err);

Function Definition with an input statement

In this function definition, an input statement is provided. The input function is used to request the user to provide the input in a designated input field. The value is then returned as the result of the function that is stored in the declared variable.

Note
This function block is invoked as an Anonymous function. An anonymous function does not have any name associated with it and is not accessible after its initial creation, it can only be accessed by a variable it is stored in as a function as a value. An anonymous function can also have multiple arguments, but only one expression.


InputOutputBlock LayoutGenerated Code

Arguments variable or any type value, 

Function statements. 

Return for a function of any type.


Create a function definition with return and input statements that store to a variable or as a value.


 
var item;


async function er_1674710886_click(e,obj,index){
   item = async function () {
  };

}

Function Definition without a statement:

In this function definition block, there is no input that is requested from the user. However, this function can return a value based on the nature of the action triggered and the parameters defined to invoke the function. This function block is also invoked as an anonymous function.

InputOutputBlock LayoutGenerated Code

Arguments variable or any type value, 

Return for a function of any type.


Create a simple function definition with return only.  It can be stored to a variable or as a value.



var item;


async function er_1674710886_click(e,obj,index){
   item = async function(){return };

}




Was this article helpful?

ESC

Eddy, a generative AI, facilitating knowledge discovery through conversational intelligence