- mysql data flow control
CASE value WHEN [compare-value] THEN result [WHEN [compare-value] THEN result ...] [ELSE result] END CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...] [ELSE result] END In the first scenario the returned results, value = compare-va

*lt, string string, string value, floating point, integers, result type, integer value, mysql data, data flow control, expression result, zero value, true results, case value, expression returns, null expression**October 23*

- unicode encoding learning
unicode character set is the most comprehensive world's most complete character set, includes almost all the world's characters. In fact, can be understood, unicode character set is a great form, the world's languages characters and punctuation mar

*character set, hex, operating system, languages, binary code, unicode characters, integers, e6, ascii character, code sequence, hexadecimal characters, physical implementation, large integer, computer character, pinyin, binary sequence, punctuation marks, dot matrix display, matrix code**October 1*

- Enter two integers n and m, from the series 1,2,3 ....... n take a few random numbers,
Title: Enter two integers n and m, from the series 1,2,3 ....... n take a few random numbers, And is equal to m, which requires that all possible combinations listed. Code: public static int count = 0; public static void traverse(int number, int sum,

*public static void, series 1, integers, random numbers, number int, combinations, stack stack, stack implementation, int number**September 16*

- Determine the stack push and pop
Title: Title: Enter two integer sequences. One of the sequences that push the stack order Determine there may be another sequence corresponding pop order. For simplicity, we assume that the push sequence of any two integers are not equal. Push the in

*lt, amp, public static void, len, integers, simplicity, input sequence, sequence 4, stack stack, index system, integer sequences, pop pop pop, pop series, nno**September 15*

- java string formatted date numbers Daquan
In C, you can use a similar printf ("% d% 8.2f \ \ n", 1001, 52.335) of the method to format the output, but in Java System.out.println () does not correspond to the function. To format the output, you must use the classes in the java.text packa

*println, javadoc, api, java system, syntax, integers, yuan, printf, java text, demo program, decimal point, java string, 2f, formatting, string pattern, zeros, course java, pattern string, decimal currency**September 5*

- Lucene data storage structure VInt (variable length integer)
Reprinted from: http://www.blogjava.net/persister/archive/2010/02/02/311642.html A variable-length format for positive integers is defined where the high-order bit of each byte indicates whether more bytes remain to be read. The low-order seven bits

*data storage, amp, source code, variable length, inputstream, variable format, integers, lucene, outputstream, byte values, integer value, second byte, final void, storage structure, negative numbers, number seven, high order bit**September 2*

- ZZ select poll epoll difference
select the nature of the use of 32 32-bit integers, or 32 * 32 = 1024 to identify, fd is 1-1024. When the value of more than 1024 fd limit, you must modify the size of FD_SETSIZE. This time we can identify the range of 32 * max fd. For a single proce

*array, cross platform support, high performance, excerpt, threads, serial operation, platforms, integers, multiple file, poll, kernel, multiple users, epoll, performance web, file descriptor, system call, select system, head pointer**August 28*

- oracle page (stored procedures)
- Start the process of writing pages create or replace procedure fenye (tableName in varchar2, pageSize in number, - number of records per page pageNow in number, myRows out number, - the total number of records myPageCount out number, - the total nu

*lt, oracle, sql statement, integers, select count, java test, pagesize, rn**August 11*

- poj 2481 Cows (stars deformation + discretization)
Cows Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 6854 Accepted: 2211 Description Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his fie

*lt, array, test cases, test case, cow, integers, segment, time limit, closed interval, memory limit, segments, clover, submissions, deformation, farmer john, two cows, mysterious phenomenon, discretization, stipple**August 9*

- Google Protocol Buffers
First, protobuf is an open source project (the official site in the " here "), you can see how hard it back. It can do this thing in the end? Simply put, it xml, json almost as well as a data structure to the information saved in some format. Ma

*data storage, code generation, google, means of communication, open source project, high efficiency, integers, xml format, customer id, transmission protocol, communication protocol, optional string, protocol format, message structure, deserialize, e commerce system, transaction price, transaction description, redundant text, overhead lines**August 5*

- Introduction of a bioinformatics toolkit
Recently swept into the bioinformatics software, paper, found many of the bioinformatics toolkit, Here a bow, I can not open some rest, but the toolkit is on svm so many Such as SVM Light http://svmlight.joachims.org/ PASBio http://research.nii.ac.jp

*integers, c code, document classification, information gain, text retrieval, automatic classification, sparse matrix, document retrieval, laplace, test train, information retrieval programs, word probabilities, andrew mccallum, bioinformatics software, statistical text analysis, statistical language, word counts, compact format, dirichlet, front ends**July 22*

- Transfer the difference between SQL Server and MySQL
1 The fundamental difference is that they follow the basic principles of both the basic principles is the main difference between them: open vs conservative. SQL Server narrow, conservative storage engine with MySQL server scalability and open storag

*storage memory, storage engine, relational database, fundamental difference, berkeley db, integers, innodb, disk storage, program features, server scalability, performance sql, default desktop, memory loss, commercial websites, server engine, backend database, sybase sql server, open storage, unfamiliar words, desktop format**July 3*

- Tagged Pointer high spatial utilization of the floating point number
Tagged pointer 1. IEEE754 double-precision floating-point defines High: 11 symbols: index, when it all bits to 1, logo infinite Low 52: decimal 2 ^ 53 infinite great! Only need the actual use of positive and negative infinity, the extra 2 ^ 53-2 Ge i

*0000, memory consumption, ruby, 16 bits, distinction, floating point, integers, haskell, unboxing, ffff, double precision, negative infinity, pointers, jia, pointer type, ieee754, programming complexity, pppp, mri, spatial utilization**June 1*

- There is one hundred million random numbers, do not sort how to find a median [transfer]
There is one hundred million random numbers, not how to find a median ranking Topic: 10G in a file with integers, order out of order, asked to find the median. Memory is limited to 2G. Ideas can only write (memory is limited to 2G, which means that y

*lt, assumption, array, memory, 5g, united states, integers, random numbers, ceil, heap, median number, bucket sort, nlog, hundred million, few differences, middle position, reactors**May 30*

- Application Message Handler object
Knowledge points Accept the child thread to send the message data, and use the data with the main thread of this news update UI. According to the identity of the message data msg.what, classification appropriate action. Example program Runnable objec

*public void, knowledge points, class member, parameters, widget, threads, integers, information code, operation id, object identity, variable declarations, progress bar control, private button, control button, window feature, thread object, signal transmission, message handler, message data, object knowledge**May 28*

- Sybase Database conversion ranks
Data table as follows: (This is a one year data) Month and now need to convert the ranks of OP field, these two fields are integers. Convert sql statement is as follows: (I tested using data is Sybase) select SaleOrDisID,Year, max(case when Month=1 t

*implementation, integers, database conversion, january february march april, january february march, february march april, max case**May 25*

- Knapsack type problem
Title: Enter two integers n and m, from the series 1,2,3 ....... n get a few numbers at random, And is equal to m, which requires a list of all the possible combinations. Idea: In every recursion, the consideration is whether or not the current eleme

*lt, amp, series 1, array, element, integers, sync, input and output, combinations, ascending order, recursion, digital input, time complexity, iostream, endl, int main, deque, deq**May 24*

- Oracle NUMBER types of
oracle data type provides a powerful number, his format Oracle number datatype syntax: NUMBER [(precision [, scale])], which referred to: precision -> p scale -> s NUMBER (p, s) Range: 1 <= p <= 38, -84 <= s <= 127 Save the data range:-1

*oracle, lt 1, 1234, gt 4, syntax, integers, number 1, decimal precision, number 3, 123456789, oracle data, 12345, 1234567, number 6, 12345678, precision scale, 1234567890, 2e**May 23*

- HDU_3818_A + B Problem
http://acm.hdu.edu.cn/showproblem.php?pid=3818 Problem Description Do you know the famous Fibonacci sequence? It is defined by the recurrence F0 = 0, F1 = 1 and Fn = Fn-1 + Fn-2 for n ≥ 2. The Fibonacci numbers have many interesting properties. One o

*fn, single line, test cases, test case, f5, integers, positive integer, case 2, recurrence, problem description, k2, f6, case number, fibonacci sequence, input line, hdu, fibonacci numbers, interesting properties, ki ki, fkm**May 21*

- End of number HDU_1406_
http://acm.hdu.edu.cn/showproblem.php?pid=1406 Problem Description After a few definitions: If a positive integer greater than 1 and equal to all the factors of its own, called the number this number is complete, such as 6,28 is complete: 6 = 1 +2 +3

*true return, test cases, test case, ctype, input data, integers, test data, positive integer, composition 1, problem description, int sum, bool, ctime, scanf, iostream, endl, cstring, cstdlib, cmath, fstream**May 21*

- HDU_1811_Rank of Tetris
http://acm.hdu.edu.cn/showproblem.php?pid=1811 Problem Description Rating system developed since the Lele, and his career is even more powerful Tetris, and soon he was all over the world into this game. In order to better meet the preferences of thos

*gt 2, gt 3, lt 2, quot quot, relationship, conflict, convenience, information output, integers, game, problem description, tetris, lele, forbes rich list, paparazzi**May 21*

- An error on the python3 discussion document
A few days ago dealing with the use of the string str to translate found a problem, summarized as follows; not specified, Python 3.2 version. Here I use the built-in function help (str.translate) return results: >>>help(str.translate) Help on met

*amp, map, query object, parameters, mapping object, scope, python, collections, few days, integers, container object, official document, dictionary, introspection, mapping support, virtual base, translation table, ordinals**May 13*

- Summary information on massive data sorting
Reprinted from http://jgzhen125.blog.163.com/blog/static/44508644201091254658679/?fromdm&fromSearch&isFromSearchEngine=yes Question: Suppose a file has 900 million of non-repetition of 9-bit integer, it requires the file to be sorted. General prob

*163, database operations, memory size, insertion sort, integers, queue, repetition, massive data, quick sort, physical memory, million records, 2g, bit computing, 50 million, 100 million, bit systems, data segments, database device, device solution, computing solution**May 13*

- A. Bot Trust issues and solutions to Google Code Jam Qualification
Problem A Blue and Orange are friendly robots. An evil computer mastermind has locked them up in separate hallways to test them, and then possibly give them cake. Each hallway contains 100 buttons labeled with the positive integers {1, 2, ..., 100}.

*google, single line, test cases, test case, integers, positive integer, t test, pi, mastermind, robots, case number, orange blue, trust issues, robot color, qualification problem, time orange, evil computer, hallways, hallway**May 12*

- Scheduling problem (C language)
The array in a descending sort n integers (including selection, bubble, insertion, fast, binary sort)

*array, c language, integers, insertion, problem c**May 10*

- 10 | [1-9] and [1-9] | 10
Sense, in fact, the two are equivalent (for a while with detail), but not rigorous written by the landlord! If the landlord want to match the 1-10, then I guess the landlord to several written: (specifically about numbers, do not speak a string) Clas

*priority, string class, match, correct wording, chapter 3, integers, landlord, peculiarities, true chapter**May 6*

- Narcissus find the number 21 (C language)
/ * * * Title: Find the number of twenty-one of the daffodils * * Author: Touch * * Thinking: 1. Statistics in a twenty-digit number that appears in all digital, and now assume a three-digit, in this three-digit, 1 there 1, 5 1 or more times, 3 occur

*lt, statistics, c language, composition, integers, calc, multiplication, pow, stdio, int count, occurrences, clock, th power, character array, digit number, daffodils, language title**May 6*

- There is an array of integers of a number of known more than half the number of occurrences, use O (n) the complexity of the algorithm to find the number of
There is an array of integers of a number of known more than half the number of occurrences, use O (n) the complexity of the algorithm to find the number. Algorithm: number of occurrences of more than half full advantage of this feature, the use of t

*lt, variables, array, complexity, algorithm, integers, stdio, argv, occurrences, int argc, candidate vote**May 5*

- In-depth internal-Redis Redis source to explain the [transfer]
Redis NoSQL database as an outstanding representative, has been broad interest, its lightweight, agile architecture, has always been stored in the Swiss Army knife is known. The following recommended an article from the source point of view to explai

*amp, databases, architecture, point of view, integers, workflow, socket server, redis, global server, source point, server state, swiss army knife, aof**April 26*

- PL \ SQL User's Guide and Reference 10.1 Reserved
Chapter X PL / SQL object type First, the role of abstract Abstraction is a high-level description of real-world entity or modeling. It can exclude irrelevant details, so that our daily lives more organized. For example, when driving a car, we do not

*data abstraction, process of abstraction, oracle database, programming language, internal components, integers, pl sql, addition and subtraction, generalization, steering wheel, accelerator, integer arithmetic, arithmetic operations, level description, scalar types, scalar type, component interfaces, driving a car, world entity, irrelevant details**April 22*

- PL \ SQL User's Guide and Reference 10.2 Reserved
5, object type instance: real Rational numbers to show the form of divided into two integers, a numerator and a denominator. Like most languages, PL / SQL is not a real number type or number of operations for the real predefined operator. Let us use

*lt, map, return integer, languages, integers, num num, pl sql, rational numbers, numerator, denominator, member function, fraction, greatest common divisor, reciprocal member, rational number, den den**April 22*

- Storage optimization bitmap
Digital maps as a simple data structure and efficient use of memory, in many occasions to express the most province of large amounts of data memory. My first impression of the bitmap from the "Programming Pearls" bitmap structure used to store p

*occasions, gap, array element, integers, data structure, efficient use, storage space, phone numbers, 1m, one million, integer number, first impression, 100 million, memory array, programming pearls, digital maps, storage efficiency, storage optimization, blank spaces, consecutive bits**April 21*

- java processing capital of RMB
public class MoneyUtil { /** Uppercase numbers */ private static final String[] NUMBERS = { " Zero, "" One ", " II, "" Triple ", " Market "," Wu ", " Lu, "" qi ", " Ba, &

*string str, return str, overflow, substring, integers, public static string, indexof**April 20*

- PL \ SQL User's Guide and Reference 3 reproduced
Chapter III of PL / SQL data types First, the predefined data types Oracle data types can be divided into four categories, namely, scalar types, composite types, reference types and LOB types. Scalar type has no internal components; and complex type

*null value, integer type, chapter iii, internal components, integers, floating point numbers, positive integer, sql data, real numbers, pl sql, oracle data, variable range, overflow error, error number, predefined types, state logic, scalar types, scalar type, integer operations, predefined data types**April 20*

- MySQL Index Analysis
To master MySQL road is tough, but fortunately a variety of relational database similar enough so that I rose to CRUD database architecture and performance tuning. During this period of the concepts is not long-winded, and I can hardly express very c

*query time, memory consumption, table structure, sql statement, database tables, database query, database architecture, performance optimization, mysql database, relational database, integers, performance tuning, questions and answers, magnitude, index analysis, table space, database index, time stamps, table reference, two million**April 19*

- oracle basic data types
VARCHAR2 (size) variable length string, maximum length of size bytes; size of the maximum value is 4000, and the minimum is 1; you must specify a VARCHAR2 in size; NVARCHAR2 (size) variable length strings, based on the chosen national character set,

*basic data types, effective date, oracle, blob, character data, january 1, maximum length, accuracy, integers, december 31, maximum value, number of bytes, numerical range, size bytes, variable length strings, national character, unicode standard, raw binary data**April 11*

- php programming basics (b) operator & process control
Operator Low to high priority. Operator with the direction of the left Left or Left xor Left and Right print Right = + = -= *= / = .=% = & = | = ^ = ~ = <<=>> = Left?: Left | | Left & & Left | Left ^ Left & No ==! = ===! == No

*lt, amp, string array, expression, array object, connection string, operands, integers, floating point numbers, control operations, high priority, short circuit, foo, string variables, expressions, java switch, divisor, control operator, programming basics**March 25*

- Turn --- Oracle sequence
Database design is independent of the three paradigm first table structure must have a unique primary key to identify the data in the table in the past, Microsoft SQL Server (duo version) platform. Manually coded table primary key. And set the self-

*increment, table structure, primary key, cache cache, initial value, integers, sequence name, microsoft sql server, oracle 10g, integer value, database entry, sequence database, official documentation, system defaults, syntax description, maximum limit, meaningful name, definition syntax, definition sequence, time maximum**March 10*

- Start a mysql syntax
Function and syntax: mod (n, m) = n% m Remainder Bitwise | & ~ bits or, respectively, bit and, bit-wise inverted BIT_COUNT (N) find the number of bits n Logical not!, Or | |, and & &, Comparison operators <,>, =, <>! =, <=,>

*lt, amp, gt 2, gt 3, string value, match, regexp, interval, remainder, integers, n3, absolute value, comparison operators, mathematical formula, numeric, expr, binary search, n1 n2, unary, case value**February 26*

- Shell script syntax - Condition test: test [
Command test or [ can test whether a condition was established, if the test is true, then the command Exit Status 0, if the test result is false, then the command Exit Status 1 (note that the C language, the opposite of logic) . For example, the size

*lt, logic, eq, c language, abc, test test, syntax, integers, test result, shell script, test conditions, exit status, integer variables, test command, command exit, logical operations, zero length, left parenthesis, command test, test parameters**February 9*

- mysql partition study notes
(The layout I sweat a... When editing a paragraph is displayed, save actually look like this...) Partition types of range, list, hash, key 1.range CREATE TABLE employees (id INT NOT NULL, fname VARCHAR (30), lname VARCHAR (30), hired DATE NOT NULL DE

*job, negative integer, paragraph, hash key, p1, integers, p2, p3, integer value, varchar, value expression, comma separated list, partition types, store id, integer partitions, components area, range exp**January 15*

- The third data storage Android SQLite embedded database (1)
A, SQLite Introduction In the Android platform, integrates an embedded relational database-SQLite, SQLite3 support NULL, INTEGER, REAL (floating point numbers), TEXT (string text) and BLOB (binary object) data type, although it supports the type alth

*data storage, crud, curd, select statement, blob, programmers, relational database, data types, integers, floating point numbers, string text, text string, query method, sql syntax, column data, type values, database api, integer field, character field**January 14*

- MS SQL collection method of rounding
Transfer: http://blog.sina.com.cn/s/blog_4d73c2c20100h24n.html - Two integer division truncates the fractional part select 3 / 4, 4 / 3, 5 / 3 - Results 0,1,1 - Return greater than or equal to the minimum number of integer expressions SELECT CEILING

*integer division, ms sql, integers, decimal point, point precision, dividend divisor, integer expressions, set dividend, int results**January 13*

- [Transfer] Vim practical technology, Part 3: customize Vim
3.1. Vim script based In. Vimrc file, and plug-ins mentioned in the second chapter and syntax files, the language used is the Vim script language. This scripting language syntax is a bit like BASIC, the expression a bit like C, it is quite easy to un

*variable name, plug ins, scripting language, global variables, basic knowledge, variable names, types of variables, integers, variable assignment, local variable, practical technology, language syntax, loop statements, two types of variables, keyboard mapping, keyboard commands, command mode commands, vim scripts, syntax files, systematic introduction**December 31*

- Within the specified date range to generate random dates
-- First, let's declare the date range. I am declaring this -- here for the demo, but this could be done anyway you like. DECLARE @date_from DATETIME; DECLARE @date_to DATETIME; -- Set the start and date dates. In this case, we are using -- the month

*sql, date time, demo, time object, integers, random number, value date, gte, modulus, substrate, automatic conversions, random dates**December 30*

- Oracle study notes of the stored procedure (2) java stored procedure calls to implement paging effects demo
--- Start writing pages of stored procedure --- Write a package create or replace package testpackage as type test_curror is ref cursor; end testpackage; The packages and stored procedures to be implemented separately. Should not prompt an error crea

*java code, localhost, drivermanager, oracle jdbc driver, jdbc oracle, oracle, sql statement, quot quot, getconnection, output parameters, integers, select count, callablestatement, question mark, hg, pagesize, emp, rn, type test, registe**December 10*

- SQL Server stored procedure or function call Com Custom Components
Although the MS SQl stored procedure comes with a encryption method, but outside there are software solutions available off. The solution is to write a DLL or OLE program, and then call on the line in a database, SQL, many extended stored procedure i

*lt, database sql, variables, object instance, exec, s2, desc, custom components, ms sql, integers, encryption method, s1, goto, error number, sql stored procedure, software solutions, component project**September 21*

- Detailed mysql string functions <1>
ASCII (str) Returns the string str leftmost character ASCII code value. If str is the empty string, return 0. If str is NULL, returns NULL. If :select ASCII('2');select ASCII(2); Results are 2 Ascii Code value 50 CHAR (N ,...) CHAR () to interpret th

*string str, gt 4, empty string, len, occurrence, integers, string length, foobar, instr, null values, ascii codes, ql, string functions, character ascii code, argument string, lpad, rpad, null returns, hi color, numeric argument**September 15*

- Sql summary of some useful
1: replace the first parameter to your function string, second parameter you want to replace part of the third parameter was asked to replace what you select replace ('lihan', 'a', 'b') ----------------------------- lihbn (The number of rows affected

*parameters, character code, similarity, integers, positive integer, ascii code, unicode character, integer expression, integer code, third position, soundex**August 31*

- Oracle NUMBER types go into detail
1>. NUMBER type to go into detail: Oracle number datatype syntax: NUMBER [(precision [, scale])] Referred to as: precision -> p scale -> s NUMBER (p, s) Range: 1 <= p <= 38, -84 <= s <= 127 Save the data range:-1.0e-130 <= number v

*oracle, lt 1, 1234, gt 4, gt number, syntax, integers, number 1, decimal precision, number 3, 123456789, 12345, 1234567, number 6, 12345678, precision scale, 1234567890, 2e**August 26*

- JAVA EE JSP_JNDI
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