assign with

 Assign value (assign) Syntax: Basic_string & assign (const basic_string & Str); basic_string & assign (const char * STR, size_type num ); basic_string & assign (const basic_string & STR, size_type index, size_type Len); basic_string &

The Assign method is understood to be to empty the original string first and then assign a new value to replace it.Returns a reference of type string. Its common overloads are also available in the following ways:A. string& assign (const string& str)

Brief Introduction We often see the assign,extend,merge function in someone else's code, which is similar to the three functions that merge the properties of the source object into the target object. Since all are merging objects, why are there

Copy: Create an object with an index count of 1 and then release the old object to NSStringFor NSString it states that a copy of the passed-in value is used when the value is assigned. Copy work is performed by the copy method, and this property is

/// ///add a piece of data/// Public BOOLAdd (model.wechatdocuments Model) {StringBuilder strSQL=NewStringBuilder (); Strsql.append ("INSERT INTO wechatdocuments ("); Strsql.append

--Create a user and assign a tablespace and assign permissions--Log in sysdba [email protected]:~> sqlplus/as sysdbasql*plus:release 12.1.0.2.0 Production on Mon Mar 7 18:48:59 2016Copyright (c) 1982, Oracle. All rights reserved. Connected

C # compile a third-party control to assign values to the form control with one click, , Cause     When writing a program, we often write the code above to display the query result to a form. How can we do this? Assign values to one row. This Code

Copy and strong (retain) differences1. http://blog.csdn.net/itianyi/article/details/9018567Most of the time NSString properties are copy, then copy and strong in the case of what is the difference?Like what:@property (retain,nonatomic) NSString

Assign: Specifies the setter method with a simple assignment, which is the default action. You can use this property for scalar types, such as int. You can imagine a float, which is not an object, so it can't be retain, copy. Assign specifies the

Copy: Create an object with an index count of 1 and release the nsstringIt indicates to nsstring that a copy of the input value is used when the value is assigned. The copy operation is executed by the copy method. This attribute is only valid for