function choose():function(:Number):Number in Java

Generation QR Code 2d barcode in Java function choose():function(:Number):Number
function choose():function(:Number):Number
Paint Denso QR Bar Code In Java
Using Barcode maker for Java Control to generate, create QR Code 2d barcode image in Java applications.
Declares a function called choose returning a function that accepts a Number and returns a Number
Make Barcode In Java
Using Barcode encoder for Java Control to generate, create bar code image in Java applications.
Figure 6-1
Recognizing Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Declaration of a function that returns another function
Denso QR Bar Code Encoder In C#.NET
Using Barcode creation for .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
In any case, no conclusions about performance should be based on only one measurement!
Generate Denso QR Bar Code In .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
6 Expressions, Functions, and Object Literals
Painting QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode drawer for .NET Control to generate, create QR Code image in VS .NET applications.
This declaration is actually the same as all the other function declarations that you have seen so far, except that more words are required to specify the return type, which makes it look more complicated than it actually is10 You invoke this function like any other Here s a loop that calls it ten times11:
QR Creator In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
1 2 3 4 for (i in [110]) { def f:function(:Number):Number = choose(); println(f(4)); }
GS1 128 Encoder In Java
Using Barcode maker for Java Control to generate, create EAN / UCC - 13 image in Java applications.
The code on line 2 invokes choose() and assigns the returned function to the variable f12 Line 3 invokes the function and prints the result Here s the result of running this once, which demonstrates that both functions are being called:
Code 39 Extended Creation In Java
Using Barcode maker for Java Control to generate, create Code 3 of 9 image in Java applications.
random1: random2: random2: random1: random2: random1: random1: random1: random2: random1: 3733331854719099 2633386473641948 15361280165149975 2152131354957821 15555729899300328 3783056254059573 18344515105724022 08343740967334363 3570944412453987 3222864647265261
Data Matrix ECC200 Creation In Java
Using Barcode encoder for Java Control to generate, create DataMatrix image in Java applications.
Assigning the function reference to a variable and then using that variable is one way to invoke the returned functionThere is another, more terse, syntax that avoids the use of an intermediate variable:
GS1 - 13 Encoder In Java
Using Barcode printer for Java Control to generate, create GS1 - 13 image in Java applications.
for (i in [110]) { println(choose()(4)); }
USS Code 128 Printer In Java
Using Barcode printer for Java Control to generate, create Code 128B image in Java applications.
The expression choose()(4) invokes the function choose() and then invokes the function that it returns with argument 4 It is slightly easier to see this if you read it like this:
MSI Plessey Creator In Java
Using Barcode generation for Java Control to generate, create MSI Plessey image in Java applications.
( choose() ) (4)
Generating Barcode In VS .NET
Using Barcode creation for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
It can get more complex Suppose the function being returned itself returns a function C programmers might be reminded of the syntax needed to declare function pointers, which is quite esoteric until you understand it What exactly does char *(*ptr)(char *, int) mean 11 The for statement, like the if statement used in the function itself, is covered in 7 12 Notice that the variable f is declared using def rather than var This is a stylistic choice that emphasizes the fact that the value will not change after it has been assigned
Barcode Recognizer In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
JavaFX Functions
Scan EAN13 In VS .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET applications.
Anonymous Functions
Drawing UCC.EAN - 128 In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create EAN 128 image in ASP.NET applications.
Function variables are not the only things that can hold a reference to a function a JavaFX class can have an instance variable for which the value is a functionThis is typically used to allow the class to invoke an application-defined method when a specific event occurs For example, the javafxstageStage class has an instance variable called onClose that is effectively defined like this:
European Article Number 13 Creation In VS .NET
Using Barcode printer for ASP.NET Control to generate, create EAN / UCC - 13 image in ASP.NET applications.
public var onClose:function():Void = close;
Bar Code Generator In C#
Using Barcode generation for .NET Control to generate, create bar code image in Visual Studio .NET applications.
This function is called when the your application s stage is being closed Here s an example that uses the onClose variable:
Generate ANSI/AIM Code 128 In Visual C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Code 128 Code Set C image in .NET framework applications.
1 2 3 4 5 6 7 8 9 function stageClose() { println("'{stage1title}' closing"); } def stage1:Stage = Stage { title: "Close Action #1" width: 400 height: 400 x: 100 y: 10 visible: true onClose: stageClose }
On lines 1 through 3, we declare the function that we want to have called when the stage is closing In this case, we just print a message that contains the stage s title Notice, though, that in this function we need a reference to the stage to get the value of its title variable, but at this point, we haven t even created the stageTo make this possible, we declare a variable called stage1 that we initialize with a reference to the actual Stage objectWe couldn t declare the stage first because we want to install the onClose handler in the object literal that creates the stage, as previously shownAlthough this code works, it is clumsy because we have had to create the function stageClose() and the script variable stage1 that we aren t going to use anywhere else In Java, you would use an anonymous inner class in this situation, and JavaFX provides a similar concept an anonymous function which is just what we need here As its name suggests, an anonymous function is a function that does not have a name The following code creates an anonymous function that returns a random number:
function():Number { return Mathrandom(); };
As you can see, the function declaration consists of the word function followed by the arguments in parentheses (in this case, there are none) followed by the return type and the function body Of course, because this function is anonymous, there is no way to reference it, so typically you would assign it to a variable, as shown nextYou can use an anonymous function in several placesThe following sections contain some examples