I. Index type:PostgreSQL provides a variety of index types: B-tree, hash, GIST, and gin. Because they use different algorithms, each index type has a suitable Query type, saving time and resources, the create Index Command creates a B-tree index.1. B-tree:Create Table test1 (Id integer,Content varchar);Create IndexTest1_id_indexOnTest1 (ID );B-tree indexes are mainly used for equals and range queries, especially when the index column contains the operator "2. Hash:Create IndexNameOnTableUsing ha
People often ask me, "I have a new idea, will you help me to see if I can use it on my business-to-business website?" "But often their ideas are not amenable to scrutiny, it is either not suitable for the industry he is in, or is not able to achieve, or can be achieved and suitable for his industry, but to be able to operate successfully, it must cost a lot of money, manpower, and his money, the team did not allow him to do such a function.
The concrete theory does not speak, I just want to comb
the probability of finding the path is 1 (as the sample count increases, P (find a path) index tends to 1). Obviously, when the sampling point is too little, or the distribution is unreasonable, the PRM algorithm is not complete, but with the increase of the use point, can also achieve complete. So the PRM is a complete and suboptimal probability.The PRM Path Planner constructs a roadmap in the free space of a given map using randomly sampled nodes i
degrees Celsius: App's startup page design has always had two distinct views: need or not. The reason for this is that the app starts with a little time initialization process, developers can use this initialization process time to show some of the brand information, and the reason is that as the device hardware performance, the app can be started faster, remove the startup page to reduce the app, It also allows developers to pursue app performance more.
Of course, the app that really can do se
page. An independent reusable block of code, wrapped up to make it yourself or with other ingredients.
Online preview 17.RIOT
You start small and you need it in something, and not in other ways. The smallest way to help everyone understand fragments is to make your application. You will have more control because there is no extra code on your way.
Online preview 18.BATMAN. JS
Batman.js Create the happiness of developers and designers as a top priority.
Online preview 19.Appium
Appium is an o
Meteor's official website (METEOR) introduces this framework:
Meteor is an open-source platform for building top-quality Web Apps in a fraction of the time, whether your ' re an exp ERT developer or just getting started.
top-quality Web AppsWe put down not the table,Fraction of the timeThe formulation is very novel, it seems that the goal of this framework is to liberate the procedural apes, less time to do more. Although the specific evolutionary path I do not know, but from a vari
Organize some open source and SaaS, team collaboration platform, project management tools. What are some of the better tools that can be recommended?
Name
Address
Note
Asana
https://asana.com/
Foreign
Basecamp
https://basecamp.com/
Foreign
JIRA
Https://www.atlassian.com/software/jira
Foreign
Confluence
Https://www.atlassian.com/software/c
Organize some open source and SaaS, team collaboration platform, project management tools. What are some of the better tools that can be recommended?
Name
Address
Note
Asana
https://asana.com/
Foreign
Basecamp
https://basecamp.com/
Foreign
JIRA
Https://www.atlassian.com/software/jira
Foreign
Confluence
Https://www.atlassian.com/software/c
beautiful interfaces and excellent search functions. Other tools such as Flowdock and Atlassian Hipchat are two chat tools that thousands of companies have relied on over the years. Yes, these are excellent communication tools, but Hall (yes, they managed to get this domain name) has quietly joined the competition.
Hall's unrestricted private or group chat rooms allow the team to learn the information at any time. It integrates many suites (such as Asana
:
Realistic words:New Use of old words (such as Apple, gain, square)
Compound Words:Combine the two words (Salesforce, Facebook)
Converged words:A part of a word is combined with a part of another word (Pinterest, Microsoft)
Suffixes:Add a suffix (blogger, contently) such as er or ly to the end of some words)
Truncation:Part of a word (Cisco is taken from San Francisco)
Other languages:Use other languages to express what you want (Reebok, asana)
"You
clear that we can closely bind our tasks and code submissions. When working as a team, this will save a lot of time and improve the accuracy of work records. A good news is that if you have used other project management tools, such as Asana, Basecamp, or others, you can add hooks in a similar way. If you do not have a hook for the project management tool you are currently using, do it on your own!
Tool 6: continuous integration
Continuous integratio
management software like Basecamp or Asana to track work processes?
The user experience designer should be knowledgeable about the product design and development process, and understand how to cooperate with upstream and downstream departments at each stage, including product managers, front-end developers, and even customer service departments, what kind of support can we get from them.
Some of the most typical stages of the product design and devel
http://www.zhihu.com/question/34531232?rf=34500201What is Meteor.js?Chen TianLinks: http://www.zhihu.com/question/20296322/answer/16089122Source: KnowCopyright belongs to the author, please contact the author for authorization.Meteor's official website (METEOR) introduces this framework:
Meteor is an open-source platform for building top-quality Web Apps in a fraction of the time, whether your ' re an exp ERT developer or just getting started.
top-quality Web AppsWe put down not the
conferencing, calendar sharing, and more.
Asana: Helps track and record the work of team members.
Jira: This people should have used it, old team collaborative application.
Inspire inspiration
Codepen: You can share and find great designs on top, and other developers will make suggestions for you.
Dribble: A community where designers share their work.
Website Performance test
Website Speed TEST:KEYCDN offers fr
reusable code block that packs up to make it yourself or with other ingredients.Online preview17.RIOTYou start small, and in the things you need it, not the other way. The smallest method helps everyone understand the fragments that make up your application. You'll have more control because there's no extra code on your way.Online preview18.BATMAN. JsBatman.js creates the happiness of developers and designers as a top priority.Online preview19.AppiumAppium is an open source test automation fram
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