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How does Mac set Safari as the default search engine?

Safari is the preferred tool for us to browse the Web using a Mac, and it's best to set it as the default search engine if you want to open it with whatever you search for! So how does Mac set Safari as the default search engine? Set the default search engine, no matter which software jumps out of the link will use it to open, together to see how to do it!Mac sets Safari as the default search engine step: First step: To open safari, then tap the Safari menu in the upper-left corner of the screen

Remove Python code for the same file under the directory (step-by-step optimization) _python

pictures are exactly the same, if the same content then the two pictures must be exactly the same. This method seems to be more perfect, let us analyze his space-time efficiency: first of all the content of each picture and other pictures to compare, this is a double cycle, reading efficiency is low, comparison efficiency is lower, all compare down is very time-consuming! In memory, if you read all the pictures in advance to memory can speed up the efficiency of the file, but the normal compute

Youdao Major revision introduced # tag mechanism to achieve accurate classification of search results

Travel: #游记 #旅游资讯 Youdao search since the launch in 2006, has been in various ways to do different attempts, but so far the feeling of the people is still tepid. The introduction of the "tag" to classify the search results is likely to become a direction for future search development. The current foreign popular vertical search engine Blekko is also through similar tags keyword to the search results classification, another site DuckDuckGo is doing

VMware three ways to configure your network

ipconfig command to obtain the network IP address of the local connection, as above: 172.16.2.41;B. Set the IP address of the virtual machine to the IP address of the local connection in the same network segment, such as 172.16.2.241;C. Restart the network configuration using the service network restart command;D. Use the ping command to check if the network is unblocked, such as: Ping 172.16.2.41.2. Host-only Mode:The NIC used in Host-only mode is:

Basic knowledge and configuration of Linux system network

#显示所有网卡2 ifconfig em1# Display the specified NIC Em13 Route-n #查看路由4 Cat/etc/sysconfig/network-scripts/ifcfg-em1 #查看DNSSix View network status1 ifconfing2 Route-n3 netstatSeven Network checks:1 Ping www.baidu.com #icmp协议基础, see not through2 traceroute www.baidu.com #基础检查, see if it hurts3 Telnet 10.0.0.24 80 Check that the server Web is open, the service is not open, and the fire wall is blockedEight Grab Bag toolTcpdumpTcpdump-n Icmp-i em1Nine DNS domain name resolution query1 Dig www.baidu.co

"Go" c++11 Concurrency Guide V (std::condition_variable detailed)

the thread is blocked, the function is automatically called lck.unlock() 释放锁,使得其他被阻塞在锁竞争上的线程得以继续执行。 in addition, once the thread is notified (notified, which is usually called by some other notify_* to wake up the current threads), the wait () function is also automatically called Lck.lock (), making the state of lck and the wait function is the same as when it is invoked.In the second case (that is, predicate is set), calling Wait () only when the pred condition is false will block the current

Signal--sigpending function

Signal--sigpending function The sigpending function returns a signal that is blocked and is pending for the calling process. The signal set is returned by the set parameter. #include int sigpending (sigset_t *set);Successful return 0, error returned-1 The following code shows the characteristics of all the signals we have described. #include static void Sig_quit (int); IntMain (void){sigset_t Newmask, Oldmask, Pendmask; if (Signal (sigquit, sig_quit) = = Sig_err) {printf ("Can ' t catch

802.11 frame Package Details

disassociation (de-connect) or Deauthentication (de-authentication) frames as a response. These frames contain a Reason code (reason code) bit length of 16bit, which indicates that the other party is doing the wrong thing, Code Meaning 0 Reserved, not used (Reserved; Unused 1 Unspecified (Unspecified) 2 Previous identity authentication is invalid (Prior authentication is not valid) 3 The workstation h

"C # Advanced series" 29 hybrid thread synchronization constructs

the wrong exit. ReaderWriterLockSlim class It is characterized by: When one thread writes to the data, all other threads that request access are blocked When a thread reads from the data, other threads that request read allow the execution to continue, but the thread that requested the write is still blocked. After the thread that writes to the thread ends, either the blocking of a write thread is unblocked

Java Concurrency--locksupport

the last park method call that has not been unblocked, or null if the call is not blocked. staticvoid park()For thread scheduling, the current thread is disabled unless the license is available. staticvoid park(Objectblocker)For thread scheduling, the current thread is disabled before the license is available. staticvoid parkNanos(longnanos)To disable the current thread for thread scheduling, w

WDCP Environment Build shell script analysis--lanmp.sh

= "Apache" elif[[ $SERVER _id==3]];thenserver= " Na "elif[[ $SERVER _id==4]];thenserver=" all "else exitfi# based on the results of the read return, determine the installed PHP version echo "selectphpversion: 1php-5.2.17 (default) 2php-5.3.29 "sleep0.1read -p "pleaseinput1,2:" nbsp php_ver_idif[[ $PHP _ver_id==2]];thenphp_ver= "5.3.29 "Elsephp_ver=" 5.2.17 "fi# judging the network situation ping-c1-t1www.wdlinux.cn >/dev/null2>1# to determine if the network is

"Network engineer must read--Network engineering Foundation" Wonderful fragment Probation (i)

, the transport entity blocks the caller and sends a group to the server. Encapsulated in this packet net load is a transport layer message sent to the server transport entity. The client's connect call will enable the transport entity to send a connect Request TPDU to the server. Lou this TPDU arrives at the server, the service entity checks to see if the server is being blocked in the Listen call. It then unblocked the server and sent the customer b

FreeRTOS Advanced Chapter 6 Analysis of the signal volume of the---freertos

( \ (queuehandle_t) (xsemaphore), \ NULL, \ semgive_block_time, \ queuesend_to_back) You can see that the release semaphore is actually a queued operation, and the blocking time is 0 (macro semgive_block_time definition). For binary semaphore and count semaphore, according to the contents of the previous chapter can be summed up, the release of a semaphore process can actu

PHP filters and processes special characters for form submission

is very effective for processing multi-byte characters. Mysql_real_escape_string determines the character set, and mysql_escape_string does not need to be considered. For other string processing functions, see: Regular string replacement in PHP and comparison of split functions.The following is a summary of Special Character Processing in common forms:Test string:1 $ dbstr = 'd: \ test2 3 \'! = \ '1 \ 'OR \ '1 \'4 5 678 Test code:01 header ("Content-Type: text/html; charset = UTF-8 ");02

Java Multithreaded notes

count, and when other methods are called in the critical section, the count is added to 1, and the calling method exits with a lock minus 1.Pay attention to the abnormal handling of the critical section and do not jump out of the critical area due to anomalies.8. The conditional object is used for the thread to wait for a condition to be satisfied when performing the action. A simple lock does not satisfy this scenario.A lock can be associated with multiple condition variable condition. Bankloc

FreeRTOS Advanced Article 8---freertos Task notification analysis

esetvaluewithoverwrite:pxtcb->ulnotifiedvalue = Ulvalue; Break Case Esetvaluewithoutoverwrite:if (UCoriginalnotifystate! = tasknotification_received) {Pxtcb->ulnotifiedvalue = Ulvalu E } else {/* The last notification value has not been taken away, this notification value is discarded */Xreturn = Pdfail; } break; Case Enoaction:/* Do not need to update the notification value */break; } tracetask_notify (); /* If the notified tas

"A useful but neglected namespace: Microsoft.VisualBasic":

the sound in the background. This is the default value, and the above code can be written directly as "Myaudio.play (@ "c:\test.wav"); ". Backgroundloop, looping through the background until the stop () method is called. Waittocomplete, play the sound until the sound playback is complete before continuing to execute other code. Basic Application of NetworkSometimes you need to determine whether the network is unblocked in the software, o

Experience and skills in Baidu searching and unblocking

The admin5 webmaster was unblocked by Baidu and received enthusiastic attention from the majority of webmasters. Qq and the major webmaster communities are discussing why admin5 can be unblocked. All kinds of guesses and inquiries are found. Many people directly asked me how much I spent. Who is it. I asked him to unban his account for 10 thousand. It was speechless. At the request of many people, I sorted

PHP filters and processes special characters for form submission

quotation marks, HTML tags, links, unblocked HTML tags, database syntax error tolerance, JS execution judgment, PHP execution judgment, multiple consecutive carriage return line breaks and spaces. Some of these concepts have an inclusive relationship, the same below. The source code output is as follows (the JS script will be executed ): II. data processing for form submission1. force add a backslashBecause some hosts enable the magic refere

The use of std::condition_variable in C++11 __c++

point should indicate the same mutex when the wait operation is invoked, when the condition variable is bound to the mutex, or the behavior of the program is undefined. The condition variable must be used in conjunction with the mutex, on the grounds that the program needs to determine whether a condition (condition or predict) is tenable, and that the condition can be arbitrarily complex. A thread leaving a critical section is unblocked (unblock) wi

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