We have introduced the features and structure of ROS. Next we will begin to prepare for the strong ROS. On the wiki on the ROS official website, the tutorials for new users are very detailed. It is best to clarify all the tutorials for new users. This is the most basic thing for later development. Despite this, ROS is still difficult for beginners to get started. Here, I will summarize my learning history and serve as a reference for other new users.I
0. Write in frontFor the first contact with the Linux system, the installation of ns-3 seems unfriendly. But in fact, the installation process is not as complex as it seems to be. In this article, the installation process in the official Wiki is slightly combed, hoping to bring some convenience to those who have just started learning.At the same time, the descriptive narrative in the official Wiki is suffic
Function
Java. lang. instrument
1.2.19. Unit Test
Http://junit.org, Junit/Jmockit https://code.google.com/p/jmockit/DjUnit, http://works.dgic.co.jp/djunit/
1.2.20. Java uses regular expressions to extract emails from a text segment and replace @ with # output
Java. lang. util. regex .*
1.2.21. Learn to use common Java tool Libraries
Commons. lang, commons .*...Guava-librariesNetty
1.2.22. What is API SPI
Http://en.wikipedia.org/wiki/Applic
Transferred from: http://blog.csdn.net/hcx25909/article/details/8811313Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Directory (?) [-]
Installation of a Ros
A beginner's Guide to Ros
Common functions in the three Ros
1rviz
2tf
3gazebo
Four Common Ros robots
1pr2
2TurtleBot
3HuskyErratic
before we introduce the characteristics and structure of ROS, we are
Source: From the ancient yueju blog
We have introduced the features and structure of ROS. Next we will begin to prepare for the strong Ros. On the Wiki on the ROS official website, the tutorials for new users are very detailed. It is best to clarify all the tutorials for new users. This is the most basic thing for later development. Despite this, Ros is still difficult for beginners to get started. Here, I will summarize my learning history and serve
Imagine creating a library of wikis. Wiki sites contain content that users can create, delete, and modify interactively. Many wikis feature a simple, text-based markup language for creating content. Typically, these markup languages provide only a subset of the functionality available in HTML, but there is a simpler, clearer source format. For example, text that surrounds the asterisk is formatted as bold, and the underlined text is formatted as an un
. Government forms all use Helvetica.
Helvetica looks neutral yet refined when cut from copper (justIgnore the Comic Sans flyer below ).
The "Love happens" cover is in Helvetica; the other is (probably)In Arial.
Helvetica is neutral enough that it works even on signs thatWocould normally use a more traditional font.
The commemorative moleskine notebooks created for Helvetica.
Helvetica light.
Another church sign in Helvetica.
Target ha
thing, like a Moleskine notebook. I particularly like to look at the thoughts and inspirations I have recorded in them from time to time. In this way, I can look back at what I had thought and use it to tweak or even reshape the design of the project at hand, or to stretch out more ideas.
2. Collect pictures
"Artists are collectors, not hoarders." You know, there is a difference between the two: Hoarders are not selectively admitted, while artists
This article is to share 40 practical jQuery plug-ins and tutorials.
Parallax Slider with JQuery
(Demo | download)
JQuery slide widget with stereo effect, cool!
Merging Image Boxes with JQuery
(Demo | download)
Very cool with the melt effect of the jQuery photo plugin, too beautiful!
Sweet thumbnails Preview Gallery
(Demo | download)
JQuery Photo plugin with thumbnail preview effect
Portfolio Zoom Slider with JQuery
(Demo | download)
A slide plugin made with Cloud Zoom and FancyBox effect
at the problem from their perspective, because this is the most useful thing. If I encounter a similar problem in the future, I can use this experience to solve it.Will you draw a sketch on paper?
Yes, but I have recently moved the sketch area from the paper to the whiteboard. Outside the office, for example, when traveling, I still draw many sketches on my Moleskine notebook. Recently I also bought a larger sketch book to help me draw a sketch.
Wher
This article will share with you 40 practical jQuery plug-ins and tutorials.
Parallax Slider with jQuery
(Demo | download)
The jQuery slide plug-in with three-dimensional effects is cool!
Merging Image Boxes with jQuery
(Demo | download)
Very cool jQuery album plug-in with ablation effect, too cool!
Sweet Thumbnails Preview Gallery
(Demo | download)
JQuery album plug-in with thumbnail preview Effect
Portfolio Zoom Slider with jQuery
(Demo | download)
Slide plug-ins created in combination with Cl
Download 30 latest free icons
Today we will share with you some of the latest free icons, including Social Icons, weather icons, cell phone icons, portfolio icons with art themes, folder icons, Valentine's Day icons, etc, formats include PNG, icon, and EPS. For more free icon downloads, refer to the following Article 15 sets of commonly used free web design icons, 460 free high-quality vector icons, and 43 sets of free high-quality icons.
This is art iconss
Pixelophilia2
The ultimate free we
often raising hands and asking questions.
To avoid generalities, I'll share a step-by-step approach, which I call "do this when I need to plan ." I have benefited from it, and I hope it will help you.
1. Open a new writing window (or, if you're an old-fashioned writer, use a pen and a Moleskine notebook)
2. Write down 3-5 things you're good at. Then write 3-5 things you're not good at, but want to improve.
3. Make sure your list is accurate. Ask you
method to restore the transaction:
DB::rollBack();
Finally, you can submit the transaction using the commit method:
DB::commit();
Note: The transaction method of DB facade can also be used to control the transaction of the query statement constructor and Eloquent ORM.Example
Assume that you want to store a knowledge point in the database. this knowledge point belongs to two different test sites at the same time, that is, the data of the test site and Knowledge Point are many-to-many relationshi
simple, fast and reliable software. Click [here] (https://github.com/golang/go/wiki/GoUsers) to see what good companies are using the go language to drive their business. This article will provide you with all the information necessary to help developers learn more about the best choice for developing WEB applications using the Go language. This article contains the most detailed framework comparisons, from a variety of perspectives, such as populari
You may have heard of weblogs, but wikis has no chance to enter your field of view. Both are examples of fast-growing so-called social software-a program that encourages connections with others and communities with good health. Blogs allows individuals to post their views and interests online, wikis is relatively concentrated on website preparation and regular editing through a professional community-these people can not only paste materials on the website, but also freely edit.
Recently, wikis
Monitoring statistics function is achieved through the filter-chain extension, if you want to turn on the monitoring statistics function, configuration statfilter, specifically look here:
Https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter
6. How to use the Druid built-in monitoring pageBuilt-in monitoring page is a servlet, specific configuration look here:
Https://github.com/alibaba/druid/wiki
account, click "admin" in the upper right corner, and select the "plugins" Link under "general" in the left column on the new page, you can upload and install the compiled Python egg in the upper-right corner of the "Management plug-in" page, and then edit TRAC. configure the INI file.Next, we will officially start introducing plug-ins, which are categorized by experience and functions. Experience autocompleteusers
Home page: http://trac-hacks.org/wiki
1. install Tomcat, version 4, and later. Note that it is best to select a folder without spaces during installation and put it in the root directory. For example, D:/tomcat55 /. This is mainly because some wiki plug-ins have requirements for this. 2. download jspwiki: http://www.jspwiki.org/wiki/jspwikidownloaddownload file: jspwi%2.2.33-bin.zip 3. copy the jspwiki In the compressed package. war to Tomcat's
is to avoid repetition. extends programming constructs exist solely for that purpose (e.g. loops, functions, classes, and more ). as soon as youStart repeating yourself (e.g. A long expression, a series of statements, same concept) Create a New Login action. http://en.wikipedia.org/wiki/Don%27t_repeat_yourself
Abstract principles
Export Action Principle-Related to dry is the role action principle "each significant piece of functionality in a program
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