1. Why use semantic tags?
1.1 semantic tags can help people understand the meaning and role of tags;. It is conducive to search engine crawling and site promotion; 3. It is accessible to mobile devices.
2.css Optimization Methods
2.1 use
1. Collection class Object Problems In the existing Code, many collection class objects are used (), which is acceptable to IE and cannot be used by Firefox.Solution: use [] as the subscript operation. For example, change document. Forms ("formname")
Mysql performance optimization 2: mysql Performance Optimization
Next, Mysql performance optimization 1Create an appropriate index
To improve database performance, indexing is the best and inexpensive. There is no need to add memory, no need to
CSS two-column layout and css two-column layout
In the layout, we often need two columns. The left column is fixed with width, and the right column changes with the browser width. How to implement it?
The traditional method is to use float to float
19. Why cannot the background color be displayed?
web Standard FAQ web Standard FAQ
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]
In IE, the ul with a background color is not
This article mainly introduces Mysql database performance optimization 2. if you need it, you can refer to the previous article to introduce mysql database performance optimization 1, today, I will continue my previous article to introduce you to
Float and decimal type bitsCN.com in MySQL
Float and decimal types in MySQL
Float and double are prone to errors. when the precision requirements are relatively high, decimal is recommended for storage. decimal is stored in mysql memory as a
High-Performance MySql evolution (I): Data type optimization _ bitsCN.com
High-Performance MySql evolution (1): Data type optimization
The database performance tuning process involves a lot of knowledge, including whether the attribute settings of
This article mainly explains how to modify the class attributes and CSS styles of jQuery. For more information, see.
Class attribute modification
Specifies the class name.When specifying a style with the class selector, you must specify the class
Use float and display:block to convert inline elements to different points of block elements:recommendation : As far as possible handwriting code, can effectively improve the learning efficiency and depth.Inline elements can be converted to
Layout Artifact Display:table-cellFirst case:In the previous layout I will use float to achieve, but it triggers more problems. For example, to clear the float, the element floats out of the document flow, but sometimes can not use the float layout.
A good security program is 100 times times better than a seemingly concise program. It's best to find a good plan and avoid a disaster, instead of trying to find the best solution. 1, Software Construction (1) define the problem. The problem is
Partial backpack (fractional knapsack)Sort the series by price/performance ratio.One at a time, until the last one is not fully loaded. Calculating scaleJava Public classFractionalknapsack { Public Static float[] Greedy_knapsack (int[] W,intWint[] v)
> Analysis>> No need to think about complex formula calculation on the line>> accuracy is only 2 decimal places, so it's faster to use float type > Ideas>> starting from n=1, decrease the length to less than or equal to 0 > attached
Use float and display:block to convert inline elements to different points of block elements:Inline elements can be converted to block-level elements, such as the use of the float property for inline elements to float inline elements, or to add
The following are personal notes : Hope to criticize the advice!IE6 should be used as little as possible to use float instead of display:inline the parent layer using Text-align:text, the effect will be better;If a set of floating elements produces
Use float and display:block to convert inline elements to different points of block elements using float and display:block to convert inline elements to different points of block elements:Inline elements can be converted to block-level elements,
Title: PortalAnswer: the direct brute force solution will definitely time out. The core of this problem is to find out the nearest pair of points between the distance, that is, the nearest point to the algorithm.In brief, the idea of divide and
Bo Master old Long wanted to summarize, but because no time, feel just to find excuses for themselves, but now spent a morning, finally tidy up, and comments more detailed, nonsense not much said, now on the code:First, the blogger customizes a Bean
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