csv translator

Converts a able to a CSV file, and a DataTable to a csv file. DataTable is used in. net projects to cache data. DataTable indicates a table with data in memory. CSV files were first used in a simple database. Because of their simple format and strong openness, they were first marked by their own gallery by the scanner. A csv

Download the CSV file in PHP code, can be a string, or a CSV file, the following directly on the codeThe first paragraph is read file, download. The second paragraph is a string download. The code is as follows: csv"; Header (' Content-type:application/octet-stream '); Header (' Content-disposition:attachment filename= '. $fileName); Echo $csv;

::fork_parent);... }It is recommended to use the service that will be called on different threads, although Boost.asio allows it, I strongly recommend that you use multi-threading, because using Boost::thread is a piece of cake. Summaryfight to make your code simple and clear. Learn and use the process. This will allow you to minimize the debugging effort, but only if there are potential bugs in the code, Boost.asio will lend a helping hand, as we have seen in the debugging chapters. If you need

, which creates a handle of 1 (in this case, all the handles are talk_to_svr::step) Handle 1 is called (when successfully connecting to the server) Handle 1 calls Async_send, which creates a handle 2 (here, we send login information to the server) Handle 1 exit Handle 2 is called and 11 bytes are sent out (login John) Handle 2 calls Async_receive, which creates a handle of 3 (we wait for the server to return the result of the login) Handle 2 exit Handle 3 is called and we receive

Similarly, in another section, when reading a message, you need to parse it, that is, when you read the data to a fragment, if the data is not a string, you need to convert it to a string. This is done by default when you use the >> operator to read something. The last thing to give is a very famous, cool trick to use the following code snippet to output the contents of the Streambuf to the console Streambuf buf; ... Std::cout Similarly, use the following code snipp

delimiter, but a complete processing method. The format of the finished processing method is:pairRead_until (Stream, Stream_buffer, Delim): This method runs a synchronous read operation with the same meaning as async_read_until.Read_until (Stream, Stream_buffer,completion): This method runs a synchronous read operation with the same meaning as async_read_until.The following example reads until a specified punctuation mark is readTypedefbuffers_iteratorstd::p airwhile (begin = end)if (std::ispun

"); , then the previous value will remain on the cconsole. The direction of the audio source that can be obtained isKinectV2the center is heading horizontally toward the left and rightRange of +/-50°.　FIG. 4 Detection range of audio source direction（+/-50°)Because the angular unit of the obtained source direction is "radian (radians)" To use equation 1 to convert to "degree (degrees)". "Equation 1 Adian (radians) converted to (degrees)" Radian (radian) → angle (degree): degree=radianx1

a client, and then you will have two threads calling On_read for a client at the same time, and the result is a data conflict that may even cause the software to crash. you will find that the code becomes extremely complex. A third option for synchronous programming is to open a thread for each connection. When concurrent threads increased, this turned out to be the least likely scenario. Then, let's look at asynchronous programming. We are constantly reading asynchronously. When a client reque

1, the Input method conversion to Sogou Input method, Sogou input menu bar will appear in the computer screen right below. 2, click Sogou Input Bar of the most right side of the "Sogou Toolbox." 3, in the pop-up "Sogou toolbox" click "+ (Add)". Open "Sogou Input Method Application Center". 4, in the "Sogou Input Method Application Center" click the "Apply All" option. In the "Full application" find "online translation", and then click "Add" that adds it to

existing instance.It is important to note that the number of consumer instances in consumer Grup cannot be more than the number of partitions.Kafka only provides a fully sorted record within a partition, not between different partitions in the same topic. Combining the ordering of each partition internal message data with the ability to divide multiple partitions by key is sufficient for most applications.However, if your application requires a complete, ordered queue based on all the message d

delimiter, but a complete processing method. The processing method is completed in the format:pairRead_until (Stream, Stream_buffer, Delim): This method performs a synchronous read operation with the same meaning as the async_read_until.Read_until (Stream, Stream_buffer,completion): This method performs a synchronous read operation with the same meaning as the async_read_until.The following example reads until a specified punctuation mark is readTypedefbuffers_iteratorstd::p airwhile (begin = e

::error_code compute_file_checksum (std::string file_name) {HANDLE file =:: CreateFile (File_name.c_str (), generic_read, 0, 0, Open_always, File_attribute_normal | file_flag_overlapped, 0); Windows::random_access_handle h (service, file); Long buff[1024]; checksum = 0; size_t bytes = 0, at = 0; Boost::system::error_code EC; while (bytes = Read_at (h, in, buffer (buff), EC)) > 0) {at + = bytes; bytes/= sizeof (long); for (size_t

)); Process_msg (); } void Process_msg () { std::string msg (buff_, already_read_); if (Msg.find ("login") = = 0) on_login (); else if (Msg.find ("ping") = = 0) on_ping (msg); else if (Msg.find ("clients") = = 0) on_clients (msg); else std::cerr }for reading results, we use the read_complete mentioned in the previous section to ensure that we can all go to the newline character (' \ n '). Logic is in process_msg (), where we read the return of the server a

out, we close its connection:void On_check_ping () { ptime now = Microsec_clock::local_time (); if ((now-last_ping). Total_milliseconds () > 5000) Stop (); last_ping = boost::p osix_time::microsec_clock::local_time (); } void Post_check_ping () { Timer_.expires_from_now (boost::p osix_time::millisec (5000)); Timer_.async_wait (MEM_FN (on_check_ping)); }This is the implementation of the entire service side. You can run and let it work! In the code, I

() { //For the result of our login operation write ("login" + username_ + "\ n"); Read_answer (); while (Started_) { Write_request (); Read_answer (); ...} }we modify it to accommodate the second case:void Loop () {while (started_) { Read_notification (); Write_answer (); } } void Read_notification () { Already_read_ = 0; Read (sock_, buffer (buff_), Boost::bind (talk_to_svr::read

somewhat similar to the previous Answer_to_client method, which shows us how the second method is implemented: struct talk_to_client:boost::enable_shared_from_this ... void Answer_to_client () { try { read_request (); Process_request (); } catch (boost::system::system_error) {Stop (); }} }; We need to modify it to make it look like the following code snippet: struct talk_to_client:boost::enable_shared_from_this

for socket input processing intreuse_address If True, Sockets can be bound to a used address boolsend_buffer_size Socket send buffer size / intsend_low_watermark N Bsp Specify the minimum number of bytes sent by the socket data Intip::v6_only If true, only IPv6 connections are allowed BOOL Each name represents an internal socket typedef or class. The following is the use of them: Ip::tcp::endpoint EP (Ip::address::from_string ("127.0.0.1"), 80);Ip: