You use a lambda expression to create an anonymous function. Use the lambda declaration operator => to separate the lambda's parameter list from its body. A lambda expression can be of any of the following two
<?phpclass Test{ public function testing() { return function() { var_dump($this); }; }}$object = new Test;$function = $object->testing();$function(); ?> 以上例程会输出: object(Test)#1 (0) { } 以上例程在PHP 5.3中的输出: Notice: Undefined variable: this in script.php on li...
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A "closure" is an expression (typically a function) that can havefree variablestogether with anenvironmentthat binds those variables (that "closes" the expression). You are usingclosureif you define a function which use a variable which is defined outside of the function. (we call the variabl...
Lambda Expressions vs. Anonymous Methods, Part Five项目 2007/03/28 Last time I demonstrated that the compiler could have to do an exponential number of bindings in order to determine whether there was a unique best overload resolution for a function call that takes a lambda. Some of you may...
Module Module1 Sub Main() 'Definition of a local anonymous type variable. 'Type inference (on by default for new projects created with Visual 'Studio 2008) will cause var1 to be strongly typed, with the type of 'the expression on the right of the = sign. Dim var1 = New With {.x ...
Object initializers enable you to specify properties for a complex object by using a single expression. They can be used to create instances of named types and of anonymous types. Declarations Declarations of instances of named and anonymous types can look almost identical, but their effects are ...
Object initializers enable you to specify properties for a complex object by using a single expression. They can be used to create instances of named types and of anonymous types. Declarations Declarations of instances of named and anonymous types can look almost identical, but their effects are ...
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