libreoffice basic programming

? ? ? ? ? ? ? 1 | | 1 =1? ? ? ? ? ? ? 0 | | 1 =1? ? ? ? ? ? ? 0 | | 0 =0????? Non:? ? ? ? ? ? ? ! 1 = 0? ? ? ? ? ? ? ! 0 = 1??? Short Circuit rule:????? ~] #COMMAND1 COMMAND2? ? ? ? ? ? ? ? COMMAND1 is "false", then COMMAND2 no longer executes? ? ? ? ? ? ? ? Otherwise, COMMAND1 is true, then COMMAND2 must perform?? ? ? ? ? ? Example: [[email protected] ~]# touch/tmp/test.etc ls/etc >/tmp/test.etc? ? ? ? ? ? ? ? ? [Email protected] ~]# cat/tmp/test.etc?????? ~] #COMMAND1 | | COMMAND2? ? ? ? ? ?

PL/SQLIt is an efficient transaction processing language and has the following advantages: 1. SupportSQL 2. Support for Object-Oriented Programming 3. better performance and higher efficiency 4. Easy to write 5.OracleHighly integrated 6. Good Security I. PL/SQLVariables and basic data types 1. PL/SQLVariable definition The basic data type varia

than to write analysis rules for various custom file formats. The problem with XML, however, is that developers have never been very easy to use it. Confusing and inconsistent APIs, such as the Document Object Model (DOM), and languages such as XSLT and XQuery, are often difficult to read and understand. But after the introduction of LINQ and Visual Basic 9.0, XML development has become much easier. In this column, you will explore the current XML

I recently saw students busy looking for job interviews and written tests in the lab. I felt deeply at my own shortcomings and decided to study the book "Java core technology" again. I used to rely on this book to enter the world of Java, however, there are also a lot of places I have missed, so it is also a sort, and then carefully learn again.1. Simple Java applications System.out.println("Hello, World!" } This program is very simple, but illustrates some of the most important

store the actual data in heap memory.At the same time, declare an array name or object name in the stack memory, and store the first address in the heap memory;Therefore, when you use the array name to assign a value, the address is passed.The reference data type is a pass-through address⑷ Data type Conversions① Automatic Conversionchar = "int"byte = "short =" int = "LONG =" float = "Double"From low to high turn, waste storage space② Coercion Type conversionsTurn from high to bottom, loss of da

This article is an example of how Android programming developed a way to draw basic graphics using path in canvas. Share to everyone for your reference, specific as follows: To draw a basic set of graphics in Android, this program is a custom view component that rewrites the OnDraw (Canvase) method of the view component, and then draws a large number of

=os_info_in.os_info_in ()9 defOs_info (self):Tenself.linux_stat=linux_status.linux_status () OneSelf.linux_stat.os_version =self.os_infos_in.os_version () ASelf.linux_stat.os_kernal =Self.os_infos_in.os_kernel () -Self.linux_stat.os_date =self.os_infos_in.os_date () - returnSelf.linux_stat the defOs_in_mysql (self): -os_db=MySQL () -Os_db.os_insert (Self.os_infos_in.os_version (), Self.os_infos_in.os_kernel (), Self.os_infos_in.os_date ())linux_fdisk.py:def Fdisk_mysql (self):

. 3. For some operators commonly used in programming languages, such as common Arithmetic Operators (+-*/), I will simply list them and not expand them. However, please note that, it doesn't mean that these are not important. On the contrary, these general operators are even in a very basic position, but I think you should be familiar with them early, and there is no need to spend time here to emphasize the

Python has many similarities with Perl,c and the Java language. There are, however, some clear distinctions between languages. The purpose of this chapter is to allow you to quickly learn the syntax of Python. First Python program:Interactive mode Programming: The call interpreter does not pass the script file as a parameter and displays the following prompt: $ Pythonpython 2.6.4 (#1, Nov, 13:34:43) [GCC 4.1.2 20120704 (Red Hat 5.6.2-48)] on Linux2

This is the most basic method of asynchronous programming. Assume that there are two functions f1 and f2, and the latter waits for the execution result of the former. The Code is as follows: F1 ();F2 (); If f1 is a time-consuming task, you can rewrite f1 and write f2 as the callback function of f1. The Code is as follows: Function f1 (callback ){SetTimeout (function (){// F1 task codeCallback ();},100

(DP); } Catch(IOException e) {System.out.println ("Send failed:"); E.printstacktrace (); } /**4. Close Resources*/S.close (); }}Run the above Java program:Get the data in the Network Data Transceiver tool:Using socket programming to receive data over the UDP protocolUdprecv.java Packagecom. Train;ImportJava.net.DatagramPacket;ImportJava.net.DatagramSocket;//UDP Transport: receiving/**Step:---* 1, establish a UDP socket, set the

C Programming in linux started from 1: master the basic usage of gcc-general Linux technology-Linux programming and kernel information. The following is a detailed description. It is best to start with the command line at the beginning, so that you can familiarize yourself with the entire process of programming, compil

Start to learn Lua programming. First, start with some simple syntax. I. Editing Environment We recommend a Lua programming IDE, which is very powerful. Zerobrane studio is available on Windows and Mac platforms. Click Open link official 2. Start some simple programming (see the example from http://blog.csdn.net/xiaominghimi/article/details/8770395) For detailed