what constant value

Several validation controlsRequiredfieldvalidator,comparevalidator,regularexpressionvalidatorRequiredFieldValidator is a control that verifies that a control must be an item. Generally include textbox,combox and so on.Common properties

An exact numeric data type that uses integer data. Data type Range Store bigint -2^63 (-9,223,372,036,854,775,808) to 2^63-1 (9,223,372,036,854,775,807) 8 bytes Int -2^31 (-2,147,483,

Differences between phpdefine constant definitions and variables. A constant must be defined before use; otherwise, an error occurs during program execution. In the php Tutorial, use the define () function to define constants. 1. syntax format:

1. RequiredFieldValidator: A non-empty verification control Main attributes:ControlToValidate: ID of the control to be verifiedErrorMessage: the message displayed when the verified control is invalid.InitialValue: the initial value of the field to

In the previous article, we introduced that we can use a for loop to complete the invocation of the iterator, very concise.So what exactly does this for loop do? I certainly did not go to see the source code, I just read a book.The data comes from

Validation controls are used to validate user input, and these controls enable developers to easily validate user input. Asp. NET provides six kinds of validation controls. 1.Required Field Validator: Controls that verify that the input is empty.

Recently in a QT program to modify the code, basically the problem is to find out what the problem is the following is about the Qabstractsocket::socketerror value And some other values, it's still useful. 1. Enum

Environment: SQL Server 2008 R2 An exact numeric data type that uses integer data. bigint Integer data (all numbers) from -2^63 (-9223372036854775808) to 2^63-1 (9223372036854775807). The storage size is 8 bytes. Int Integer data (all numbers)

Figure 1 differences between the compile-time and runtime Constants   Compilation times are a little faster than running times, but it lacks flexibility.Program"Slow" can ensure correct operation, and "fast" may lead to errors, so I believe that

Define php constants. Constants can be interpreted as variables with unchanged values. After a constant value is defined, it cannot be changed anywhere in the script. A constant consists of letters, underscores, and numbers, but can be understood as

What is a class constant? What we can understand in PHP is that the value is constant, so what is a class constant? In fact, the class constants are also easy to understand, we can always keep the constant value of the class is called constants, and

what is wi-fi?Wi-Fi is a technology that can connect PCs, handheld devices (such as PDAs and mobile phones) to each other wirelessly. Wi-Fi is a brand of wireless network communication technology, held by the Wi-Fi Alliance.Wi-Fi was originally

First, let's talk about the differences between static variables and global variables. global variables can be accessed by all functions. If multiple independent functions use variables of the same name, a conflict may occur, when only one function

  Preface This chapter is about android. view. SoundEffectConstants. The version is Android 2.3 r1 and translated from "Lingyun Jian pen". You are welcome to visit his blog: http://www.cnblogs.com/lijian2010/. Thank you again "Lingyun Jian pen "! I

In "Qtandroid detailed (4): JNI calls Android system features (1)" We give some simple examples of how to use the Qt JNI class library to access network status, System resource directory, current application information and so on, this time, we

First, let's talk about the differences between static variables and global variables. global variables can be accessed by all functions. if multiple independent functions use variables of the same name, a conflict may occur, when only one function

Seticon (qicon ("toolbutton.png "));Seticonsize (qsize (48, 48 )); If there is no such sentence, the image is scaled and placed on the image. If the following sentence is added, the background image of the image is set to the current size.   You can

QtAndroid details (5): JNI calls Android system functions (2), qtandroidjni In "QtAndroid details (4): JNI calls Android system functions (1)", we provide some simple examples, demonstrate how to use the Qt JNI class library to access the network

The C # language has two different constants: A complie-time constant and a runtime constant. The two constants have different behaviors. Incorrect use may lead Program Or an error occurs. The compile time is a little faster than the run time, but

This article address: http://www.cnblogs.com/archimedes/p/pl0-compiler1.html, reprint please indicate source address.pl/0 IntroductionThe following is excerpted from wiki:pl/0, is similar to but much simpler than the general-purpose programming