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Category 1 lost updates When transaction A is canceled, the updated data of transaction B that has been committed is overwritten. This error may cause serious problems. You can see it through the following account withdrawal transfer: Time Withdrawal transaction Transfer transaction B T1 Start transaction T2 Start transaction T3 The account balance is USD 1000. T4 The account balance is USD 1000. T5 Re

MIPs has 32 General registers ($0-$31). The functions of each register and the usage conventions in assembler are as follows: The following table describes the aliases and usage of 32 general-purpose registers. ; Register Name Usage $0 $ Zero Constant 0 (constant value 0) $1 $ Reserved for reserver) $2-$3 $ V0-$ V1 Function call return value (values for results and expression evaluation) $4-$7 $ A0-$ A3 Function call para

The email address bloom filter is built. Now let's see how to use the bloom filter to check whether a suspicious email address Y is in the blacklist. Generate an address using the same 8 random numbers (F1, F2,... F8 ). Eight information fingerprints (s1, s2 ,..... s8), and then the eight information fingerprints are mapped to the 8 binary bits of the bloom filter, t1, t2 ,.... t8. If Y is in the blacklist, it is clear that t1, t2,...

% = 1 goto S2 If % var1 % = 3 if % var2 % = 1 goto S3 If % var1 % = 4 If % var2 % = 1 goto S4 If % var1 % = 5 if % var2 % = 1 goto S5 If % var1 % = 6 if % var2 % = 1 goto S6 If % var1 % = 7 if % var2 % = 1 goto S7 If % var1 % = 8 If % var2 % = 1 goto S8 If % var1 % = 9 If % var2 % = 1 goto S9 If % var1 % = 10 if % var2 % = 1 goto S10 If % var1 % = 1 If % var2 % = 0 goto T1 If % var1 % = 2 if % var2 % = 0 goto T2 If % var1 % = 3 if % var2 % = 0 goto T3 If % var1 % = 4 If % var2 % = 0 goto T4 If

Spire.xls; Step 1 : Creates a new workbook object and loads the Excel document.New Workbook (); Workbook. LoadFromFile ("sample.xlsx"); Step 2 : Gets the first sheet of the Excel document and sets the print options.Worksheet sheet = workbook. worksheets[0];Here are a few common settings for printing options:Set the print area/range:"a7:t8"; Set the print header (header row):"$1:$1"; Set the Excel worksheet to zoom to one page wide one page High

: \ Documents ents and Settings \ user1 \ Desktop \";String r6 = Regex. Replace (t6, @ "\ user1 \", @ "\ user2 \\");Extended 16-bit escape charactersString t7 = "% 41"; // capitalString p7 = "% ([0-9A-Fa-f] [0-9A-Fa-f])";String r7 = Regex. Replace (t7, p7, HexConvert );Delete comments in C Language (to be improved)String t8 = @"/** Notes for traditional styles*/";String p8 = @"/\ * # Match the delimiters starting with the Annotation.*? # Matching comm

; * } $}1 PackageCom.example.ran.listviewdemo;2 3 Importandroid.support.v7.app.AppCompatActivity;4 ImportAndroid.os.Bundle;5 ImportAndroid.widget.ListView;6 7 Importjava.util.ArrayList;8 Importjava.util.List;9 Ten Public classMainactivityextendsappcompatactivity { One A PrivateListNewArraylist(); - - @Override the protected voidonCreate (Bundle savedinstancestate) { - Super. OnCreate (savedinstancestate); - Setcontentview (r.layout.activity_main); - InitData (); +MyDataAd

uploading pending data to HDFs5.2 Convert data in HDFs to a pattern that pig can handle A = LOAD '/wlan ' as (T0:long, Msisdn:chararray, T2:chararray, T3:chararray, T4:chararray, T5:chararray, T6: Long, T7:long, T8:long,t9:long,t10:chararray);5.3 Extract the useful fields from the inside B = FOREACH A GENERATE MSISDN, T6, T7, T8, T9; 5.4 Grouping DataC = GROUP B by MSISDN; 5.5 Traffic SummaryD = FOREACH C

Reprint Please specify source: http://blog.csdn.net/l1028386804/article/details/464917731.Pig is a data processing framework based on Hadoop. MapReduce is developed using Java, and Pig has its own data processing language, and the pig's processing process is converted to Mr to run.The data processing language of 2.Pig is the way of traffic, similar to the maths problem in junior middle school. 3.Pig basic Data type: int, long, float, double, chararry, ByteArray composite data type: MAP, Tuple, B

type processing mobile internet logs" of mobile internet logs for the background, we have to do is through the pig Latin the log traffic statistics. The data structure of the log is defined as follows: (The file is: Http://pan.baidu.com/s/1dDzqHWX)　　PS: upload the file to HDFs before using pig, which is uploaded to the/testdir/input directory Hadoop fs-put Http_20130313143750.dat/testdir/input 3.2 Load: Convert data in HDFs to a pattern that pig can handle(1) First enter the

Transfer from http://www.cnblogs.com/LittleFeiHu/p/4035166.htmlAction: Encapsulates a method that does not have parameters and does not return a value Public Delegate voidAction () Action: The generic for action implements the definition of 1 to 16 incoming parameters, but still has no return value, concludes that the action does not support the return value, and if a return value is required, use another system delegate func Public Delegate voidactioninchT>(T obj) ... Public Delegate voidaction

secondsString T5 = "01/01/01 16:10:01";string P5 = @ "(\d+)/(\d+)/(\d+) (\d+):(\d+):(\d+)";Match M5 = Regex.match (T5, p5);Change directory (for Windows platforms only)string T6 = @ "C:\Documents and settings\user1\desktop\";string r6 = Regex.Replace (t6,@ "\\user1\\", @ "\\user2\\");Extended 16-bit escape characterString t7 = "%41"; Capital AString P7 = "% ([0-9a-fa-f][0-9a-fa-f])";String R7 = Regex.Replace (T7, P7, Hexconvert);Delete comments in the C language (needed to be perfected) String

1,600,000,002 binary (bit), or 200 million-byte vector, and then all of the 1.6 billion bits to zero. For each e-mail address X, we use eight different random number generator (F1,F2, ..., F8) to generate eight information fingerprints (F1, F2, ..., F8). Then using a random number generator G to map these eight information fingerprints to eight natural numbers from 1 to 1.6 billion G1, G2, ..., G8. Now let's set the bits of all eight positions to one. When we do this with all 100 million email

relational database, a query can access cells from multiple columns in a row). You can treat a member of a column family in a row as a child row .The table is decomposed into more than one table area , equivalent to a Bigtable slice (tablet). A region contains rows in a range. Decomposing a table into multiple regions is a key mechanism for efficient processing of large tables.Each of the tables in HBase is called BigTable. BigTable stores a series of row records with three basic types of defin

Create a table in the database, with ID, Fatherid, value three fields, you can store a tree.How to put the table data in the form of a tree, the following little brother with Python simple simulation.Beginner python, please give us a lot of advice. In addition very grateful http://www.cnblogs.com/lzyzizi/to younger brother's guidance.Operation Result:A-1B-1C-1D-1E-1E-2C-2B-2C-3C-4Source:1 #!user/bin/python2 3 classNotemodel:4 def__init__(Self,id,value,fatherid):5 Self . Id=Id6 Self.value=value7

):Print S*strnum,currenttree.show ()Self.logList.append (Currenttree)Currenttree = Self.getfathertree (currenttree)Strnum-= 1Continue#初始化一些节点实例T1 = TreeModel (1, ' A-1 ', 0)T2 = TreeModel (2, ' B-1 ', 1)T3 = TreeModel (3, ' B-2 ', 1)T4 = TreeModel (4, ' C-1 ', 2)T5 = TreeModel (5, ' C-2 ', 2)T6 = TreeModel (6, ' C-3 ', 3)T7 = TreeModel (7, ' C-4 ', 3)T8 = TreeModel (8, ' D-1 ', 4)T9 = TreeModel (9, ' E-1 ', 8)T10 = TreeModel (Ten, ' E-2 ', 8)#将这些节点实例链

if (User.isopen ()) { User.sendmessage (message);,? $ R7 A%? N1]. [7 @$ J } } catch (IOException e) { E.printstacktrace (); : C1 t* | j$ i% O4 T8 H }%]6 X6 _9 e) z, ') j% '! H2 N } }2 ^# o (i ' (h ' Z7 L } Copy Code Information input index.html:-z k; W5 d$ U1 ~ (~* T 7 A8 F3 O5 v; b# G3 B: ^ 7 @ (L1 e# @) X u% \ M8 B7 O0 D5 T5 H "_

obtained, and the Content-desc property is not obtained for NULL.2.content-desc property is empty, print result: Bookshelf# content-desc为空，获取的是textt3 = driver.find_element_by_id("com.baidu.yuedu:id/lefttitle").get_attribute("name")print(t3)3.content-desc property is not empty, printing results: Baidu read# content-desct4 = driver.find_element_by_id("com.baidu.yuedu:id/fragment_banner").get_attribute("name")print t44.id,calss,text Property gets# idt5 = driver.find_element_by_id("com.baidu.yuedu:

TFT* Bit[0]: 0 = Disable The video output and the LCD control signal.*/Lcd_regs->lcdcon1 = (4/* Time parameter in vertical direction* Bit[31:24]: vbpd, vsync after a long time to issue the 1th row of data* LCD Manual t0-t2-t1=4* vbpd=3* Bit[23:14]: How many lines, 320, so lineval=320-1=319* Bit[13:6]: VFPD, after sending the last line of data, it takes too long to issue VSync* LCD manual t2-t5=322-320=2, so vfpd=2-1=1* bit[5:0]: VSPW, pulse width of vsync signal, LCD manual t1=1, so vspw=1-1=0*

(30,23,59,59,999);//30.23:59:59.9990000 DoubleF= 365.25; TimeSpan T5=Timespan.fromdays (f);//365.06:00:00TimeSpan T6=Timespan.fromhours (f* 24);//365.06:00:00TimeSpan T7=Timespan.fromminutes (f* 24 * 60);//365.06:00:00TimeSpan T8=Timespan.fromseconds (f* 24 * 60 * 60);//365.06:00:00TimeSpan T9=Timespan.frommilliseconds (f* * [ * + * + ]; // 365.06:00:00 TimeSpan t0 = timespan.fromticks (( long ) (F * * $ * $ * + * 1