trumpet serial number

UUID (Universally unique Identifier) a globally unique identifier, which is a number generated on a single machine that guarantees that all machines in the same time and space are unique. Based on the standard calculations developed by the Open Software Foundation (OSF), Ethernet card addresses, nanosecond time, chip ID codes, and many possible numbers are used. A combination of the following: the current date and time (the first part of the UUID is r

First, display serial number If you need to sort each piece of data in a DataGrid and display an ordinal number, you can use the DataGrid with its own properties rownumbers Property Name attribute value describes default value Rownumbers Boolean If true, a row number column is displayed. False

)[^]: matches any single character outside the specified range[[: Alpha:]]*[[:space:]]*[[:alpha:]]: Get a file that starts with a letter, ends with a letter, and has spaces in the middle[[: Alpha:]]*[[:space:]]*[^[:alpha:]]: Get a file that starts with a letter, does not end with a letter, and has spaces in the middlePractice:1, create A123, Cd6, c78m, C1 My, m.z, K, 8yu, 789 and other documents; Note that the above files are separated by commas, and the other symbols are part of the file name;2

nsstring* identifiernumber = [[Uidevice Currentdevice].identifierforvendor uuidstring];NSLog (@ "Mobile serial number:%@", identifiernumber);Phone aliases: User-defined namesnsstring* userphonename = [[Uidevice currentdevice] name];NSLog (@ "phone alias:%@", userphonename);Device Namensstring* devicename = [[Uidevice currentdevice] systemName];NSLog (@ "Device name:%@", devicename);Mobile phone system versi

Serial lockTitle Abstract: One gray code to another gray code the minimum number of conversion steps required.Idea: Directly find the corresponding decimal, subtract the absolute value.When n=2 , the sequence of transformations is xx,The sequence of transformations when n=3 is 001,011,010,111, 101,......Careful observation found that this is the gray code, adjacent to two states only one difference (in fact

1, with Excel2013 open a worksheet, the following figure, our task is now in a column insert do not randomly change the serial number. Select the A2 cell, where you enter the function "=row ()-1", and the row () function is to get the line number. 2, press the Ctrl+enter key combination, will get the value of the function, we now put the mouse to the

Add serial number in SQL query recordAdd the row Name field to the query results according to the student's score:1.SELECT row_number () over (order by score ASC) as Rank,name,score from GRADE ORDER by score;This is written directly in the result record add order sort ordinal2.SELECT RANK () over (order by score ASC) as Rank,name,score from GRADE ORDER by score;This notation is ordered sequentially accordin

Complete with pointer function: There is a student, each student has a B course. Required to output the student's score after entering the student number # include The "C language" is done with the pointer function: There is a student, each student has a B course. Required to output the student's score after entering the student serial number

@sQZ = Sqz from Serialno where scode= @sCode--there is no record in the factor table, insert the initial value If @sValue is null Begin Select @sValue = CONVERT (bigin T, convert (varchar (6), GETDATE (), () + ' 000001 ') Update Serialno set svalue= @sValue where scode= @sCode end Els The Select @dToday = substring (@sValue, 1,6)--If the date is equal, add 1 if @dToday = Convert (varchar (6), GETDATE (), 12) Select @sValue = CONVERT (varchar) (CONVERT (bigint, @sValue) + 1) Else -If

Some people asked me how to add a serial number field in the absence of a continuous id in mysql, so that the queried data contains numbers 1, 2, and 3. Let's look at the method below. In the following simple sentence, you can add the serial number to the mysql search result. SELECT @ ROW: = @ ROW + 1 as row, t. * FR