It is called default function parameters . It allows formal parameters to be initialized with default values if no value or undefined is passed. NOTE: It wont work with Internet Explorer or older browsers.
Read moreIs it possible to assign a default value to a function parameter in the function definition?
It is called default function parameters . It allows formal parameters to be initialized with default values if no value or undefined is passed. NOTE: It wont work with Internet Explorer or older browsers.
Read moreHow do you make a function parameter optional in flutter?
Named optional parameters You can call getHttpUrl with or without the third parameter. You must use the parameter name when calling the function . You can specify multiple named parameters for a function: getHttpUrl(String server, String path, {int port = 80, int numRetries = 3}) { // … }
Read moreHow do you make a function parameter optional in flutter?
Named optional parameters You can call getHttpUrl with or without the third parameter. You must use the parameter name when calling the function . You can specify multiple named parameters for a function: getHttpUrl(String server, String path, {int port = 80, int numRetries = 3}) { // … }
Read moreWhat is the default value of the function parameter?
In JavaScript, function parameters default to undefined .
Read moreWhat is the default value of the function parameter?
In JavaScript, function parameters default to undefined .
Read moreWhy do we pass functions to Flutter widgets?
Functions are first-class objects in Dart and can be passed as parameters to other functions. We pass a function to a widget essentially saying, invoke this function when something happens . … Dart does both declarations as well as setting up the callback.20 Tem 2020
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