concept pm3

1. What is the namespace in PHP? What is a namespace? "In the broadest sense, namespaces are a way of encapsulating things." This abstract concept can be seen in many places. For example, in the operating system the directory is used to group related files, which play a role as namespaces for the files in the directory. For example, file Foo.txt can exist in both the directory/home/greg and/home/other, but there cannot be two foo.txt files in the sam

Turn from: http://www.cnblogs.com/ggjucheng/archive/2011/12/13/2286391.html The concept of pointers A pointer is a special variable that is stored in a value that is interpreted as an address in memory. To figure out a pointer needs to figure out four aspects of the pointer: the type of the pointer, the type the pointer is pointing to, the value of the pointer, the memory area that the pointer points to, and the memory area occupied by the pointer

Concept Hot return to hot, but did not see a few video sites can make money. Indeed, it is difficult to "scenery" by selling the concept. But from free "sharing" to charging, it doesn't seem like a very hard thing to do.It is no exaggeration to say that Google's takeover of YouTube has sparked a new boom in online video investment. But in the near future, the prospect of many domestic video websites is begi

the concept of modules and packages in Python Table of Contents 1 Modules (module) and Packages (Package) 1.1 Namespaces (Namespace) 1.2 Modules (module) 1.3 Packs (Package)1 Modules (module) and Packages (Package) 1.1 Namespaces (Namespace) Because everything in Python is object, and you want to understand module and package, you must first understand the concept of namespace. The so-called namespace, re

The concept of §5.1 definite integral First, from Archimedes ' exhaustion law "Introduction" from the curve and straight line, the area of the surrounding figure. For example: Insert a dividing point on the interval, get the point on the curve, over these points respectively to the axis, the axis of the vertical, to get the ladder shape. Their respective areas are: Therefore, the area value can be To facilitate the understanding of Archimedes

business split into a lot of sub-business, and then for each sub-business cluster deployment, so that each sub-business if the problem, the entire system will not be affected. Excerpt from: What is the difference between a distributed and a cluster? Distributed concept reference: Features and design concepts of distributed systems In addition, there is a concept similar to the distribution, that is, micros

Recently in the chapter on the graph theory of discrete mathematics, here is my classification and summary of some important concepts of the graph. Describe the concept of relationships Association--used to describe the relationship between a point and an edge, which simply means that the edge is made up of those points and is associated with those points. The correlation matrix is a matrix that records the number of points in the Edge Association.

Comparison with nouns in traditional database Nouns in the nfluxdb Concepts in a traditional database database database measurement table in the database Points A row of data inside the table Second, the unique concept of INFLUXDB1) database--database, this database concept with traditional database.2) measurement--data

Tags: SLA share driver data type doc local names boolMongodbConceptual Analysis No matter what database we learn, we should learn the basic concepts, the basic concept in MongoDB is a document, a collection, a database, we introduce each one. The following table will help you understand some of the concepts in MONGO more easily: SQL Terminology/Concepts MongoDB Terminology/Concepts Explanation/Description Data

Tags: independent 1.2 subset Character learning learn note data type start global variableThe basic concept of MongoDB1. Documentation1.1 Definition: Documentation is the core concept of MongoDB. Multiple keys and their associated values are placed in an orderly mannerTogether is the document. A document can be understood as the total row of data for a relational database.1.2 means: {"greeting": "Hello,worl

The origins of computer viruses The concept of computer viruses actually originated quite early, and in the years before the first commercial computer appeared, the pioneer of computer Neumann (John Von Neumann) in one of his papers, "The theory and understanding of complex automata", has outlined the blueprint for viral programs. At the time, however, the vast majority of computer experts were unable to imagine the process of reproducing themselves.

from:http://www.iteye.com/problems/67953This article organizes the concepts and operations of partitioned tables from the following aspects:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and disadvantages of table partitioning4. Several types of table partitioning and how to operate them5. Maintenance Operations on table partitioning.(1) The concept