I. Details about resource classification in Android 1. Android Resource ClassificationResources in Android fall into two categories: resources that can be accessed directly and native resources that cannot be accessed directly;-- Direct access to
Network programming is how to realize the communication between two computers in the program, and the communication between the two computers is actually two inter-process communication, the communication between processes is mainly through the
1. Method of establishing TCP connection
The client typically takes two steps to establish a TCP connection, and the server process takes four steps, as shown in the comparison below.
Steps
TCP Client
TCP Server
1, the establishment of TCP connection method
The client typically takes two steps to establish a TCP connection, and the server process takes four steps, as shown in the following comparison.
Steps
TCP Client
TCP Server
The process of establishing a TCP connection for a server is divided into 4 steps:1. Set up the socket object: here, as with the client, remains:S=socket.socket (Socket.af_inet,socket. SOCK_STREAM)2. Setting and getting socket optionsPython defines
The server is very similar to the client program. The client program is learned in the previous section. This section describes how to use socket to establish TCP and UDP servers.
1. TCP connection establishment method
Generally, two steps are
1. TCP connection Establishment Method
Generally, two steps are required for the client to establish a TCP connection, and four steps are required for the server process. For details, see the comparison below.
Procedure
TCP client
TCP
Php variable definition method. 1. define the CONSTANT define (CONSTANT, Helloworld.); a CONSTANT can only contain scalar data (boolean, integer, float, and string ). When calling a constant, you only need to obtain the constant by name.
1. define
Data type in PHP (1 ). PHP supports eight primitive types. Four scalar types: boolean (integer) float (float) (floating point number, also known as "double") string (string). PHP supports eight primitive types.
Four scalar types:
Boolean)
Integer)
Analyze the usage of PHP variables in depth. We are using PHP variable 1. define the CONSTANT define (CONSTANT, Helloworld.); a CONSTANT can only contain scalar data (boolean, integer, float, and string ). When calling constants, we only need to use
Chapter 4-basic PHP syntax. 1. the first PHP program ?? 2. PHP supports eight basic data types, including four scalar types: boolean, integer, float, and s 1. first PHP program
2. PHP supports eight basic data types, including four scalar
PHP learning variable usage summary. 1. define the CONSTANT define (CONSTANT, Helloworld.); a CONSTANT can only contain scalar data (boolean, integer, float, and string ). When calling a constant, you only need to obtain the constant by name.
1.
Summary of eight basic data types in PHP. Four scalar types: boolean (boolean) integer (integer) float (float type, also known as double) string (string) two composite types: array (array) object (pair
Four scalar types:
Boolean(Boolean)
Integer(
Link: http://www.cnblogs.com/zhangpengshou/archive/2008/10/19/1314424.html
A ArrayArray
B bool (INT)Boolean(Integer)
By unsigned char (byte)Unsigned characters(Bytes)
C charCharacter(Bytes)
CB count of bytesBytes
Cr color reference
1. Start and close server processes: The following are the usage and common options of the pg_ctl command. It should be noted that this command is the encapsulation body of the S command, so it is more convenient to use than using Postgres directly.
PHP supports 8 basic types of data.
Four types of scalar:
Boolean (Boolean)
integer (integer type)
float (floating-point, also called double)
String (String)
Two kinds of composite types:
Array (arrays)
Object
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