what is hdlc

redundancy and is not conducive to maintenance.3. How to linkLinking refers to the use of HTML header tags to introduce external CSS files.Example:head> link rel="stylesheet" type="text/css" href="style.css">head>This is the most common and recommended way to introduce CSS. In this way, all CSS code exists only in a separate CSS file, so it has good maintainability. And all the CSS code exists only in

A process is a running activity of a program with certain independent functions about a data set.The difference between a process and a program:1, the program is an ordered set of instructions, is a static concept, its ability does not have any meaning of operation. The process is a process in the process of processing

The difference between OLAP and OLTP and what is Data Warehouse OLAP is often referred to as a data warehouse. But the data warehouse is only part of OLAP, not all. OLTP multi-index than OLAP, and the real-time requirements of high, updated and modified many. OLAP generally seldom modifies and updates data, and so on,

) are not interfering with each other, and cannot be mixed together. Also give the behavioral layer a "fallback", taking into account what happens if your users disable Javascript? is not a webpage can also function normally.Amount Said a long time found are some of the theoretical things, as some basic ideas, specific people in the process of continuous practice to slowly experience.In short, these three t

When I first approached, I thought the compiling principle would be very dull. But I'm browsing the information on the Internet. And let me have a new discovery, found that this course is really important. Baidu explains to us is that the compiling principle is a major professional course of computer science, which aims to introduce the general principle and basi

The question is not just what you have, what you say, but how you pack it. Unless you can communicate and share with them, you have the best idea, the most coolCode, Or a better architecture will eventually be fruitless. As a developer, we must communicate with each other. Communicate with customers, demand analysts, project managers, technical directors, boss,

A lot of friends must have heard of the price of a single page, and, no matter what industry, medical or Taobao customers, products, basically will be used to auction a single page to marketing their own products. At this point, we can see that we are more pro-Lai in the bidding of a single page, but for the price of a single page is not particularly clear, for the price of a single page to reflect

The new lithium battery (polymer battery) is short for Polymer lithium-ion battery and one of the types of lithium-ion battery. To understand what a new lithium battery is, in addition to providing the definition of the new lithium battery, we also need to find the answer from its classification, characteristics and target market.I. Definition: the so-called new

design. The categories that are preferred and suitable for use by pear are as follows: PHP enthusiasts, that must use pear, because it is absolutely awesome. PHP's professional programmer. What you need is code security, repeatability, and good productivity, pear absolutely necessary. PHP programmer, want to develop more interesting, more powerful applications,

What is a thread? What is the difference between it and the process? Why multithreading ?, Multi-thread A thread is an execution unit in which the program code can be executed during execution. In Java, a thread has four states: running, ready, suspended, and ended. A proces

Twisted (1) -- What is asynchronous, twisted -- What is asynchronous I have long wanted to write an article about python's two asynchronous libraries, twisted and tornado. When developing python tcpserver, we usually only use three libraries, twisted, tornado, and gevent. The efficiency of asynchronous libraries repres

What is the reason for Java OutOfMemoryError and what is the Java native method?Second, the Java native method reproduced BlogFirst article:It took two hours today to get a good read of the English article about what native method is