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In the 360 cloud disk for more than half a year, there is the pain of overtime, has been praised by users, have experienced a variety of platforms (including PC version, Web version, iphone, Android and ipad version) of the growth and accumulation, the corresponding interactive bull Jeff Johnson's UI design guidelines, this article is mainly to share with you the two points in the mobile phone cloud of the
number of rows returned by the query result is less than 5% of all rows in the table, the index is the fastest way to retrieve data. If the query result exceeds 5%, the index is usually not the fastest way.
10. The column where the primary and unique keywords are located automatically has an index, but the external keywords are not automatically indexed.
Index features
After determining that an index is suitable for a query, you can customize the index type that best suits the specific situati
Database design Guidelines (first, second, third paradigm description) I, relational database design Paradigm Introduction 1.1 First normal form (1NF) No duplicate columnsThe so-called First paradigm (1NF) refers to the fact that each column of a database table is an indivisible basic data item and cannot have multiple values in the same column, that is, an attri
After reading Jeffrey Palermo's essay how to design a single method, most of the principles of his method design agree. The Design of methods is part of the design of classes (on the premise of Object-Oriented Design). It is a matter of detail, but also a matter of whether t
Editor's note: Professional designers create a set of design guidelines and standards before each project starts, as the authors say, which optimizes the workflow, keeps the design consistent, is the professional attitude of every rigorous design, and is one of the cornerstones of a professional designer. Oh, yes, the
thing is dont make me thinkThen the original design of the problem is: the overall tone is too refined, go in after not a clear look at the current set of Internet access, and then through the three tab switch to see the respective presentation, the display is not clear and clearLater modified design: Come in directly can see the current set of content, and the introduction of a variety of Internet access
Tags: Database performance criteria Paradigm SQL ServerForeword: Author Shivprasad Koirala, former Microsoft asp/asp. NET's MVC engineer, now a CEO in India. Students First translation, if there is inappropriate, generous enlighten.Brief introductionBefore you start reading this article, let me tell you that I am not a master of database design. The following 11 guidelines are derived from the project, fro
effectiveness of the UI, simplicity and beauty, we should also evaluate the effectiveness of the API, simplicity and the elegance of the code!
API design--javascript API design content that presents the only challenge to all developers, whether or not you are developing a public library or an internal library. The dynamic nature of JavaScript, the anonymity of library users and the ambiguity of requiremen
The following design guidelines are designed to enable the android user experience team to maintain the best user experience. Integrate them into your creativity as your design philosophy, rather than intentionally using them.
Attract meTry to please me in an amazing wayA beautiful interface, a well-arranged animation or sound effect, is a great user experience.
left and top properties, the inner Div will move the same distance to preserve its position with the external div. In fact, as long as the outer and inner margins of the elements are set, in most cases only the default static positioning is sufficient to achieve the layout of the page. Many beginners (include myself) who have just touched CSS will mistakenly set the Position property, and eventually find that the elements removed from the document flow are difficult to control. Therefore, do no
Many people agree that tables are often overlooked, although they are an important part of user interface design. Tables should show structured data that makes it easier for users to read, scan, and compare, but in many cases tabular data is ambiguous. That's why a lot of people don't like forms.
Users often use tables for their daily work, but who needs to make them crash? To change the status quo, here are some
Design and Development Guide for usability Web Forms. The discussion of forms in web design has been going on for 10 years, and there are a number of principles listed in this article, including layout, validation, code readability, and using jquery to improve the form.
Two-column vs. one
This decision would generally depend on the content of the form, but it's often preferable to avoid a two-column layou
1.: First-line pseudo-ElementThe "first-line" pseudo-element is used to set a special style to the first line of text.2.:first-letter Pseudo-ElementsThe "First-letter" pseudo-element is used to set a special style to the first letter of the text:3.: Before pseudo-element": Before" pseudo-element can insert new content in front of the content of the element.4.: After pseudo elementThe ": after" pseudo-element can insert new content after the element's contents.The pseudo-elements of CSS
development environment (Integrated development environment) is an application for the provider development environment, typically including code editors, compilers, debuggers, and graphical user interface tools.
DLL: dynamic link library English as DLL, is the short form of the dynamic link library, DLL is a library containing code and data that can be used by multiple programs simultaneously, DLL is not an executable file.
. So: for a shared library, is a sharer object for dynamical
block element, it will scale to the size of its content, and it needs to be explicitly set width:100% to remain the same width as the browser. At the same time floating section,footer will try to push up to the floating element next to the need to set the clear property of footer, the cleared element will not be promoted to the floating element next.Method Three: Add non-floating purge elementsThe third method of forcing a parent element to contain its floating child elements is to add a non-fl
IOS7 's 10 design guidelines cover four aspects of UI design interactivity, readability of the interface information, graphic design specifications, and organization of information. Read on and see if the UI you've designed has done it?
1. Format content
When creating a screen layout, you shou
Like many excellent products, the success of iPad applications also depends on factors such as the core value of the product and the user experience model. In addition to games, most types of applications must be able to help users solve certain problems in a certain context. It should be simple and easy to use, so that users can get started smoothly without complicated settings and learning.
The performance of products in terms of visual appearance, interaction, and emotional connection will
Atitit. after upgrading the class library framework API Code Compatibility Design Guide1. increase The API directly, the version number is added 1 above the comment 2. Discard APIs, use your ideas @dep13. Modify the API,14. Modify dependent import, ya Yao Add file mode. Maintain compatibility. 15. preferred to select the same file in the changes, because the file more than a bad management, the compilation speed is also slow ... 15.1. Advanta
its content, and it needs to be explicitly set width:100% to remain the same width as the browser. At the same time floating section,footer will try to push up to the floating element next to the need to set the clear property of footer, the cleared element will not be promoted to the floating element next.Method Three: Add non-floating purge elementsThe third method of forcing a parent element to contain its floating child elements is to add a non-floating child element to the parent element a
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