Drop-down menu navbar-collapse folding effect

The previous article has described the configuration of quartz.net, the use of the and cron expression expressions. Basically, the timing of the task in the background is completed, and the relevant job can be executed correctly according to the execution plan.

Then, if the task needs to be updated, stop a task? Can not be on the server to change the configuration of the relevant job. Therefore, Quartz.net also provides us with a method of remote dispatch. This time, we briefly introduce the configuration and method of the Quartz.net remote dispatching.

In JavaScript, we can use functions, arrays, objects, and instances of some built-in types such as dates, regular, and so on, all of which are manifestations of complex types. Essentially, these complex types are object types. This article will focus on the embodiment of three types of object: functions, arrays, and objects.

The database index is similar to the index of a book, the index does not need to complete the book, the database can be found directly in the index, after the entry in the index, you can jump directly to the location of the target document, which can increase the speed of the search for several orders of magnitude.

In many processor architectures, it is similar to handling exceptions and handling interrupts, in order to help understand that exceptions can be imagined as soft interrupts, and we usually say that interrupts are hard interrupts, and hard interrupts are caused by hardware rather than software.

Each interrupt has a corresponding interrupt handler, if an interrupt device can produce a variety of interrupts, then the interrupt device has multiple interrupt handler corresponding, and an interrupt handler is part of the device driver corresponding to the device

The meaning of this passage is that there is a virtual machine implementation, the head of the array object will occupy these 8 bytes.

(2) When converting an array operation, why is the length longer or shorter than size ()? The reason for this is that in the case of concurrency, of course, the mechanism above the concurrency environment is not necessarily feasible, such as in the ArrayList rewrite the method, encountered size () and hasnext inconsistent situation will be directly error. However, there are scenarios in which the weak consistency can be maintained in this way, and the specific follow-up of this situation is specified.

Since graduation, has been in the current company to do the development of order meal system, when there is no word of mouth, not hungry, not to mention the United States to sell outside, Baidu sold outside ... Because the size is relatively small, is a server contains a database, IIS ... And then it's over. Finally wait for the litters group development meal system, thought can learn more server related things, production environment I can't touch, but still understand a lot of content: session how to use database to save, picture how to use a separate server and so on, although all is pediatrics, but first contact these when, Still have a lot of emotion: think before have been white.

And then, finally, one of our customers daily orders at 5K (12, still pretty good), I thought the opportunity came again, just as I was filled with joy of the two server, then they told us that they use other people's system, then, the order began to be less, then, the group to their city, and then , then there is no more.

Since the beginning of the development of the front-end, I found that in the development of the page, there is always a problem very much affect their development efficiency, this problem is the name of CSS, mainly refers to the CSS class selector named. This problem is mainly reflected in: first, some of the content you can not think of what name to give it named, because the general name is always considered semantic, so that other people see the name of the CSS class to know it is the role of which content, but because of the complexity and diversity of web content, It's hard to make sure that every part can have a proper name, even if you finally have to come up with a name, whether it's the right kind of tangle, and most of all, the naming process is a very laborious mental activity that consumes a lot of brain cells, something that's not worth it.

In fact, for the use of drop-down menu class dropdown, the basic format is like above, or you can change the link a To button, and so on, flexible use.

II: Navigation bar components

Note the point:

1: The navigation bar is all the components arranged horizontally, wrapping components, similar to the form of horizontal navigation

2: Ensure accessibility. Use <nav> tags or <div role= "navigation" >

3: Classes that relate to the navigation bar include: Navbar-inverse (to achieve the background color of black and text white effects), navbar-fixed-top|navbar-fixed-bottom (fixed navigation bar at the top and bottom)

Near the neighborhood site construction recently, this morning was the site of the guang! guang! ... Woke up. It's a very loud, you're sure to ask how loud it is? How much louder? How do you describe it? Immediately began to develop a record sound audio app, busy an afternoon so out of this sound detector

This provides only 720p and 1080p of two of the clarity of the seed, in a variety of clarity, the crawl found 1080p will jump directly out of the seed list of the traversal, or to download the highest clear of the

Take our lovely network card to say things, such as the network card from the Internet to collect a lot of data packets, so our friend network card June notice the kernel, hey, I this came a batch of new goods, to see, so the core fart to deal with the fart (call interrupt handler) interrupt to start execution, notify the hardware to start copying data , this is very urgent, because the network card has a certain cache, more than the cache this guy will not work (discard the packet), in order to squeeze the network card (let him work), the kernel must deal with this matter as soon as possible, and this thing is hardware-related (that is, and the network card is not involved), no network card can not After copying these packets, we can put them into the next section, so the kernel is too busy to deal with the process just interrupted.

Because the naming is semantically named, this may hinder the reuse of CSS code, such as the content of a Web page with a. Title to describe its style, this title contains 2 rules, {font-size:14px; line-height:20px}, Another aspect of the page may need to have the same style as the title, but from the location of the page where the other content is located, may use. desc to name is more appropriate choice, this time, I believe that the people who like the semantic naming will be the content of a separate CSS class desc, and then the title of the style copied over, resulting in a CSS file will have two of the same style rules, just named different, so the code is repeated.

Drop-down menu navbar-collapse folding effect