As a developer, there are situations where the function we create have parameters that might have default values we can. In such situations, JavaScript allows us to define optional parameters to deal with them. These default values are used when we don’t explicitly specify a parameter value. ...
we will go through various types of functions, will define how each type influencesvariables objectof a context and what is contained in thescope chainof each function. We will answer the frequently asked questions such as:“is there any difference (and if there are, ...
I have attached an image of an example. The Form.getElements function requires only 1 parameter, but has 2 optional parameters. In the JavaDoc statement for the function I state which arguments are optional and would like to a) know if there is a way...
indexOf(searchString,[startIndex])– Finds the first occurrence of searchString in the array. An optional zero-based starting index can be used to specify where to start the search in the array. Similar to JavaScript, indexOf can use objects for the search string parameter. ...
ParameterDescription tryCodeRequired. Code block to be tested while executing. errA local reference to the error object. catchCodeOptional. Code block to execute if an error occurs. finallyCodeOptional. Code block to execute regardless of the try result ...
], function(Map, ... ) { var map = new Map("mapDiv"); ...}); Later in the code, the map container is referenced in the DIV id. In this second example, the optional extent parameter is also included in the constructor. require([ "esri/map", "esri/geometry/Extent", ... ...
An initializer is the optional third parameter to a binding expression that specifies a function to call when the binding is established: XMLCopy You provide an initializer as part of a binding expression if you want to participate in or even replace the existing binding behavior—for example, ...
In the above program, we have used theapply()method to invoke thegreet()function. Inside theapply()method, the parameter: personName- isthisvalue ["Good morning", "How are you?"]- are values for"wish"and"message"parameters of thegreet()function ...
{// SQL query text using LIKE keyword and parameterquery:`select * from products p where p.name LIKE @propertyValue`,// Optional SQL parameters, to be used in queryparameters: [ {// name of property to find in query textname:"@propertyValue",// value to insert in place of property...
The highPass() function takes one required parameter for the number to be tested and one optional parameter for the cutoff. If the optional parameter is not supplied, the function assumes that it is being called as a method of a valid filter object and uses the cutoff property of the objec...