preg_replace function Prototype:Mixed preg_replace (mixed pattern, mixed replacement, mixed subject [, int limit])Special Note:The/e modifier causes preg_replace () to use the replacement parameter as PHP code (after replacing the appropriate reverse reference). Tip: To make sure that replacement makes up a valid PHP code string, PHP will have a syntax resolution error in the report containing Preg_replace ().Example:
Copy Code code as follows:
Tags: mongodb $set updateMongoDB Chinese file in the database after the Update method updates the document, the Update method has two parameters, such asUpdate (ARGS1,ARGS2)ARGS1 refers to the condition of querying a document;ARGS2 refers to what changes are made to the document being queried;One, document replacement> joe1= Db.post.findOne ({"Age": +}) {"_id": ObjectId ("54a530c3ff0df3732bac1680"), "id": 1, "name ":" Joe "," Age ": 20}> joe1.age=2121> db.post.update ({" id ": 1},joe1) Writeresu
Asp.net modifier introduction (about public, private, protected, internal), protectedinternal
1. private Modifier
The private modifier is used to set the access permission of a class or class member to the internal of the class,Private is also called a private modifier. You can use the get and set accessors to read or
Technorati MARK: java. The overall usage of modifiers is described as follows:
Modifier
Modified parts
Description
Abstract
ClassInterfaceMethod
Initialization is not allowed. methods that have not been implemented are included.All interfaces are abstract. whether to add abstractThe constructor cannot be modified. Only common methods can be modified. Internal classes are abstract.
Final
Java basic knowledge note (1: modifier, vector, hash table), javaI. Features of the Java language (develop the habit of frequently viewing Java online help documentation)
(1) Simplicity: Java is a new type of computer language simplified and improved on the basis of C and C ++ computer languages. It removes the pointers that are most difficult to correctly apply C and C ++ and the multi-inheritance technology that is most difficult to understand, and
Transferred from: http://www.cnblogs.com/webapplee/p/3771708.htmlJava modifier type (public,protected,private,friendly)Public classes, generic variables and methods, and any class within and outside the package can be accessed;Protected classes, generic variables and methods, any class within the package, and those outside the package that inherit from this class can be accessed;Private class, generic variables and methods, any class outside the packa
This article mainly introduced the PHP regular modifier usage, combined with the example form the PHP regular modifier's function, the use method and the related attention matters, the need friend can refer to the following
This example describes the PHP regular modifier usage. Share to everyone for your reference, as follows:
Modifier:
POSIX compliant regula
question)* First line of package, import second, class third4. Common modifiers used by the class and its composition* A: modifier:* Permission modifier: private, Default (Defalut), protected,public* Status modifier: static,final* Abstract modifier: Abstraction* B: Class:* Permission
Parse the PHP regular expression modifier. We will encounter modifiers in PHP Regular Expression Learning. so what do we need to know about PHP regular expression modifiers and how to use them? So let's take a look at it. we will encounter modifiers in PHP Regular Expression Learning. so what do we need to know about PHP regular expression modifiers and how to use them? Let's take a look at its concept and related content. Before learning the PHP regu
Reprint Original Address http://developer.51cto.com/art/200908/147327.htmC # language is more common, here we mainly introduce C # sealed modifier, including the introduction of two modifiers in the meaning of mutually exclusive use of methods and properties.What does the C # sealed modifier do?The C # sealed modifier means that when sealed for a class, it means
Pattern Modifiers-modifier of the Rule expressionThe following are the modifiers available in the current rule expression. The names in the brackets are the internal PCRE names of the modifiers.I (PCRE_CASELESS)If this modifier is set, the expression is case-insensitive.M (PCRE_MULTILINE)By default, PCRE considers the target string value as a single-line string (even if it does contain multiple rows ). the
What are php regular expression I, is, s, isU, and so on? 1. Regular expression operation sequence () parentheses are the highest as they are processed in memory *? + {} Duplicate matching content second ^ $ B boundary processing third condition processing fourth final calculation matching in order 2. Regular expression pattern modifier I regular content is case insensitive during matching (default yes) php regular expression pattern
What are php regular expression I, is, s, isU, and so on? 1. Regular expression operation sequence () parentheses are the highest as they are processed in memory *? + {} Duplicate matching content second ^ $ B boundary processing third condition processing fourth final calculation matching in order 2. Regular expression pattern modifier I regular content is case insensitive during matching (default yes) m matches the first content or the last php regu
Php Regular Expression modifier usage example details, php instance details
This example describes the php Regular Expression modifier usage. We will share this with you for your reference. The details are as follows:
Modifier:
POSIXCompatible Regular Expressions Do not have modifiers.
Possible modifiers in PERL-Compatible Regular Expressions (space and line fee
Technorati Tag: Modifier, java, toString
For the first time I wrote this kind of blog on this topic, I have many questions I don't know or can't write well. If I can't write well, I 'd like to ask you to point it out. I hope you can leave your suggestions, let me work hard. When I write this kind of blog, I can make a small improvement. First of all, thank you for reading this article.
When learning java reflection, I have been confused about getting
C # Modifier
Modifiers are used to restrict the declaration of types and type members. modifiers in C # can be divided into four parts by function: attribute modifier, access modifier, class modifier and member modifier. Property modifie
C # class access modifier,
By default, the class is declared as internal, that is, only the code in the current project can access it. You can use the internal access modifier keyword to explicitly specify, but this is not necessary. Classes of this type are defined by default. However, the default access level of the C # method is private.
The access level of method or attribute
For documents that are updated in addition to replacements, only partial updates to one or more documents are required to use the atom's update modifier to efficiently document updates. The update modifier is a special key in theUsed to specify complex operations, such as adding, deleting, or adjusting keys, and possibly manipulating arrays or inline documents.1. $inc----------------------------------------
);//accessiblePclass.showpublic (); Access toThe following two compilation errors, private methods in another class are not accessibleSystem.out.println ("Resource properties accessible to:" +pclass.privatevariable); Cannot accessPclass.showprivate (); Cannot accessPrivate variables can be accessed by themselvesSYSTEM.OUT.PRINTLN ("Private variable can be accessed by itself" +t.var);Protected members can be accessed by members of the class and by a member of the subclass.can also be accessed by
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