fast shuttlecock

One: Rapid failure (fail-fast)When traversing a collection object with an iterator, if the contents of the collection object are modified (added, deleted, modified) during traversal, the concurrent modification Exception is thrown.Principle: The iterator accesses the contents of the collection directly during traversal, and uses a Modcount variable during traversal. When a collection is traversed, the value of Modcount is changed if the content change

Master-level articles can always bring you closer to the nature of things. Recently saw the Pongba of mathematics of the United States: Fast row why so fast. An article in Mackay (translated here) mentions the essential reason for using information theory to explain the speed difference between a row and a heap. Look, there is a kind of inexplicable excitement inside. Although do not understand information

Java (Part 3 and 4) ----- fail-fast mechanism, java ----- fail-fast In the JDK Collection, we often see something similar to this: For example, ArrayList: Note: The Fast failure behavior of the iterator cannot be guaranteed, because in general, it is impossible to make any hard guarantee for non-synchronous concurrent modifications. The quick failure iterator w

Description: Reprinted from http://www.cnblogs.com/skywang12345/p/3308762.htmlOverviewIn the front, we have learned ArrayList. Next, we take ArrayList as an example to understand the fail-fast mechanism of iterator. The content includes:1 Fail-fast Introduction2 Fail-fast Example3 Fail-fast Solutions4 Fail-

How about the millet fast pass? 1, transmission speed is dozens of times times the Bluetooth can be free biography of your mobile phone files, but also do not need traffic, this and Bluetooth is just the same speed than Bluetooth dozens of times times oh; How did the Millet express disappear? The previous version of the MIUI has this function, and then disappeared after the update, you can download the Millet

of the entire industry, but more should be based on me, because others do not mean I can. Can not listen to the wind is rain, finally messed up their own square inch--"six uncertain, lose a clean." I say, everybody wants to be strong and big, but with the heart, your website development speed is fast enough--from last July I know that I knew you from Baidu, then your site is only dozens of IP, now a number of major projects, but also live well, the b

Fast snail mail: apt-fast If you often feel that apt-get or aptitude package installation is too slow On Debian or Ubuntu systems, there are several ways to improve this situation. Have you ever considered changing the default image site in use? Have you ruled out the possibility that the upstream bandwidth of the Internet Connection becomes a bottleneck? If not, try the third option: Use the apt-

Introduced in the previous ArrayList of the expansion of the problem for the modcount operation is not described in detail, the operation of the variable in Add,remove and other operations will change. So what's the effect of this variable? An introduction to the fail-fast mechanism, a fast failure mechanism, is an error detection mechanism in the Java Collection (Collection). When the set changes in struct

Timeout retransmission is an important mechanism for TCP to ensure data reliability. Its principle is to enable a timer after a data is sent,If no ACK packet is sent within a certain period of time, the data will be re-sent until the message is sent successfully. This is dataA repair mechanism is provided when the package is lost. Generally, retransmission occurs after timeout, but if the sender receives more than threeThe duplicate ack should realize that the data is lost and needs to be re-tra

First, index fast Scan (index fast full scan)The index fast full scan, which is very similar to index full scan, is also suitable for all types of B-tree indexes, including unique indexes and non-unique indexes. As with the index full scan, the index fast full scan also needs to scan all index rows for all leaf blocks

Millet Fast Pass how to set 1, in the Millet mobile phone we open "file management" and then long press the file in the sheet out menu we click on the "Fast Pass" mode transmission. This time the phone disconnected the network, and automatically opened the hotspot. 2, should pay attention to is regarding accepts the handset also to have "the fast pas

Fast Cache and Fast VP are part of the fast Suite. The two products can work together and complement each other when they are sold. FAST Cache enables the storage system to provide flash drive-level performance to the most frequently accessed block of data across the system. FAST