chord substitution

In some cases, you may want to cache the ASP.net page, but you need to update the selected section on the page based on each request. For example, you might want to cache a large portion of a page, but you need to dynamically update the time-related information on the page. You can use the substitution control to insert dynamic content into a cached page. The substitution control does not render any markup

closure principle is the most direct embodiment of this goal. 　　Other design principles, often in order to achieve this goal, such as the Liskov substitution principle to achieve the best and right level of inheritance, can guarantee that the open closure principle will not be violated. On the principle of open closure, the core idea is that the software entity should be extensible and not modifiable. 　　In other words, the extension is open, and the

The Richter substitution principle was presented in 1994 by the 2008 Turing Award winner, Professor Barbara Liskov , the first woman in computer science in the United States and Professor Jeannette Wing of Carnegie Mellon University. It is strictly stated as follows: If for each object of type S O1, there is an object of type T O2, so that all program P defined in T O1 the substitution O2 of all objects, th

In practical programming, we usually use the STRTR () function when we want to implement the function of string substitution. Let's take a look at how the PHP string substitution is implemented. V First look at the two states of this PHP string substitution function strtr () STRTR (String,from,to)or STRTR (String,array) First of all, for the STRTR function, the

appearance, that is, methods and properties, then why do you want to mention it here? is because the Richter scale substitution law can be used in a positive way, but not in reverse. In the presence of subclasses, the parent class may not be competent. Or the example of the firearm just now to illustrate that the rifle has several relatively loud models such as AK47, G3 sniper rifle, etc., we look at the class diagram:Quite simply, G3 inherits the Ri

What is the implementation of the PHP regular expression substitution? First introduce you to the PHP preg_replace,php Preg_replace use is our implementation of the method, then for the PHP regular expression substitution implementation process we start from the instance. Related concepts of PHP regular expression substitution: Preg_replace: Perform search and r

Time:2016-03-30 20:00 This month is a bit busy, the work of the school of things personal things a little annoying, but can not stop learning more can not forget to write blog! Recently read the book "Proficient in CSS", picked a point to record a bit. I. MeaningImage substitution, just like we usually add text to the text, and then through the CSS hidden text in its position to display a background image, so that the search engi

PHP string substitution function, there are str_replace (), Str_ireplace (), Substr_replace (), Preg_replace (), STRTR () and so on, the programmer when writing programs, Often choose one or more according to their own habits and the actual situation. Although these functions have the function of string substitution, they are different from grammar to function, speed and efficiency, so they are not availabl

The method substitution, can replace any external class's method, but the dynamic addition method can only implement in the object which the added class creates, but uses the method substitution and the dynamic addition method to use, may implement, the arbitrary external class dynamically adds the necessary method, this method may be the class method also may be the instance method, This external class can

STRTR (string,from,to): Replace one character at a distance, whichever is shorter in the From and to, for example:STRTR ("Aidenliu", "AI", "B") replaces only the a output that appears in the original string: BidenliuSTRTR ("Aidenliu", "a", "BC") replaces only the a output that appears in the original string: BidenliuThis function is case sensitive, and if multiple substitutions occur, each replacement's blueprint is the original one, rather than replaced on the basis of the previous

string or a function. If it is a string, then each match is replaced by a string. However, the $ character in replacement has a specific meaning. As shown in the following table, it shows that the string that is matched from the pattern will be used for substitution. Character replacement text$ 、...、 $99 The text that matches the 1th to 99th subexpression in the RegExp.$ the substring that matches the regexp.$ ' is the text on the left side of the m

When a user opens a Word document that is created on another computer in the current computer, it often encounters a situation where the current computer lacks a preset font. The user can replace the missing font with the font substitution feature provided by Word2013, as described in the following procedure: Step 1th, open the Word2013 document window, and click the file → options button, as shown in Figure 2013080118. Figure 2013080118 Click the

In PHP, there are several character substitution functions, such as: Str_replace, Substr_replace, Preg_replace, Preg_split, Str_split and other functions, let me give you a summary of the introduction.Yi, Str_replace (find,replace,string,count)Function: the Str_replace () function replaces some other character in a string with a string.Parameter descriptionFind required. Specifies the value to find.Replace Required. Specifies the value that replaces t

In. net, Substitution control is a very good control. It can cache the entire page, but it can also make local Dynamic Refresh, a bit ajax flavor. The following small series will introduce it to you. This method is defined as a static method (shared method in Visual Basic ).This method accepts parameters of the HttpContext type.This method returns a value of the String type.Note: The Substitution control ca

LoadRunner get milliseconds and string substitution implementationsToday make aPerformance Testing, parameterization requires the creation of user names can not be repeated, think there is no good way to avoid the repetition of the user name.　　So we want to use time + random number to achieve, but the implementation of a problem encountered. The name cannot contain. This particular character. So you have to deal with the. String, so you want a C langu

On the Richter scale substitution principle, the OCP, as the high-level principle of OO, advocates the use of "abstract (abstraction)" and "polymorphic (polymorphism)" To change the static structure of the design to the dynamic structure and maintain the sealing of the design. "Abstraction" is a feature provided by the language. Polymorphism is implemented by inheritance semantics.Definition 1: If for each object of type T1, there is an object O2 of t