ternary_operator_with_empty_widget Description Avoid having a ternary condition operator with an empty widget inside a collection. Details There is no need to have a ternary operator when one of the expressions is an empty widget, e.g. S...
To test whether two objects x and y represent the same thing, use the==operator. (In the rare case where you need to know whether two objects are the exact same object, use theidentical()function instead.) Here’s how the==operator works: Ifxoryis null, return true if both are null...
您可以嵌套三元运算符，将条件放在更深的小部件上。
A search of Dart code in g3 shows 150 cases where people have written the pointless ternary operator code in Dart: foo ? true : falseinsteadfoo and 70+ cases of foo ? false : trueinstead!foo Likely code reviewers caught even more cases before the code was committed. Quick assists to r...
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forEach((name) => print("Example28 '${name}'")); } /// For control flow we have: /// * standard switch with must break statements /// * if-else if-else and ternary ..?..:.. operator /// * closures and anonymous functions /// * break, continue and return statements example...
字符串 您可以嵌套三元运算符，将条件放在更深的小部件上。
一个动态项目的列表），但监听了错误的属性。确保您正在创建像这样的状态小部件;
{ "code": "PLUGIN_ERROR", "message": "A request threw the exception:Null check operator used on a null value\n#0 ResolverVisitor.flow (package:analyzer/src/generated/resolver.dart:399:36)\n#1 TypeAnalyzer.analyzeIfElement (package:_fe_analyzer_shared/src/type_inference/type_analyzer.dart:...
* Stable release for null safety. ## 2.0.0 * Breaking: `BooleanSelector.evaluate` always takes a `bool Function(String)`. For use cases previously passing a `Set<String>`, tear off the `.contains` method. For use cases passing an `Iterable<String>` it may be worthwhile to first use...