An instance variable assumes a unique status by virtue of its intimate connection with the object itself. This type of variable finds its declaration within a class, but outside the confines of a method, and each instance of the class (object) possesses its own distinct copy of this variable...
instance variable在对象被创建时初始化，假如有5个对象，那5个对象中该instance variable可以有不同的值。static variable在类被第一次加载到jvm中时初始化，像c中的global variable，被所有instance共享，因此在multi-thread编程时要特别注意线程安全问题。
The default value for instance variables in Objective-C is 0. Local variables take precedence over the instance variable and effectively hides it.
instance variable：实例变量，即类型的成员变量，且是非静态(即非static)的。local variable：局部变量，即在类型的成员方法体内定义的变量。class A{int a;//实例变量void B(){int b;//局部变量}}
Lambda expressions rely on the type of theAction/Funcvariable that they're assigned to determine the argument and return types. In local functions, since the syntax is much like writing a normal method, argument types and return type are already part of the function declaration. ...
DECLARE{ { @local_variable[AS]data_type[ = value ] } | { @cursor_variable_nameCURSOR} } [ ,...n ] | { @table_variable_name[AS]}::=TABLE( {<column_definition>||} } [ ,...n ] )<column_definition>::=column_name{scalar_data_type|AScomputed_column_expression} [COLLATEcollation...
Assigns a value to the variable in-line. The value can be a constant or an expression, but it must either match the variable declaration type or be implicitly convertible to that type. For more information, see Expressions (Transact-SQL).@...
LocalVariableInfo() Initializes a new instance of theLocalVariableInfoclass. Properties Expand table IsPinned Gets aBooleanvalue that indicates whether the object referred to by the local variable is pinned in memory. LocalIndex Gets the index of the local variable within the method body. ...
Information about a local variable and how to inspect it. Currently local variable info includes the user visible name of the variable and the method on the inspection query to execute to get its value. This API was introduced in Visual Studio 14 RTM (Dk
class C { public int y; void Foo() { int x; x = 0; // (1) This binds to the local variable defined above. y = 0; // (2) This binds to the field y. { x = "s"; // (3) This binds to the local defined below. string x; y = "s"; // (4) This binds to the ...