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[Turn]linux Sort command in detail

most original Facebook.txt file.$ sort-n-K 2 Facebook.txtGuge 50 3000Baidu 100 5000Sohu 100 4500Google 110 5000$ sort-n-K 2-u Facebook.txtGuge 50 3000Baidu 100 5000Google 110 5000When the settings are sorted by the company's employee domain, and then you add-u, the Sohu line is deleted! The original-u only recognizes the domain that is set with-K and finds the same, deleting the same rows.$ sort-k 1-u Facebook.txtBaidu 100 5000Google 110 5000Guge 50 3000Sohu 100

Linux Sort command Details

5000Sohu 100 4500Google 110 5000$ sort-n-K 2-u Facebook.txtGuge 50 3000Baidu 100 5000Google 110 5000When the settings are sorted by the company's employee domain, and then you add-u, the Sohu line is deleted! The original-u only recognizes the domain that is set with-K and finds the same, deleting the same rows.$ sort-k 1-u Facebook.txtBaidu 100 5000Google 110 5000Guge 50 3000Sohu 100 4500$ sort-k 1.1,1.1-u Facebook.txtBaidu 100 5000Google 110 5000So

"Go" linux sort command in detail

5000Sohu 100 4500Google 110 5000$ sort-n-K 2-u Facebook.txtGuge 50 3000Baidu 100 5000Google 110 5000When the settings are sorted by the company's employee domain, and then you add-u, the Sohu line is deleted! The original-u only recognizes the domain that is set with-K and finds the same, deleting the same rows.$ sort-k 1-u Facebook.txtBaidu 100 5000Google 110 5000Guge 50 3000Sohu 100 4500$ sort-k 1.1,1.1-u Facebook.txtBaidu 100 5000Google 110 5000So

C + + window design Practice Project 2 person Income tax Calculator

2, the preparation of multi-branch selection structure program, enter the total monthly income, calculated his monthly tax and after-tax income. Income Tax calculation method: from . years 9 Month 1 since the beginning of the day, our country adjusts the personal income tax levy point. The base is raised to 3500 , and the excess is calculated at the following 7 levels. Serial number Income Range Rate Calculator Deduction Number 1 more than 0 to

Research on the vulnerability of online bank security

measures to ensure the security of users ' online transactions. But no matter what, please believe that the sky will never drop pie, only in case of prevention, to avoid "Shang.""Bank article" feed the hacker a piece of tough   Case Playback In early July this year, Ms. Huang, Nanning, opened an online banking business in Nanning Taoyuan branch of China Construction Bank, and suddenly found that 4500 yuan in his account had disappeared. From the b

Detailed introduction to Dynamic SQL usage in Oracle _oracle

provided in Oracle to execute dynamic SQL, as follows: Copy Code code as follows: Excute immediate Dynamic SQL statement the using-bound parameter list returning into the output parameter list, which is described as follows: 1 dynamic SQL refers to DDL and indeterminate DML (that is, DML with arguments) 2 The binding parameter list is the input parameter list, which is of type in type, and is bound at runtime with the arguments in the dynamic SQL statement (actually place

Android determines if PhoneGap is networked and loads Super.loadurl URLs _android

Copy Code code as follows: public void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); Super.setintegerproperty ("SplashScreen", R.drawable.splash); Connectivitymanager cwjmanager= (Connectivitymanager) Getsystemservice (Context.connectivity_service); Networkinfo info = Cwjmanager.getactivenetworkinfo (); if (info!= null info.isavailable ()) { Super.loadurl ("http://www.xxx.com", 4500); } Else {

Investigation on the survival status of 2015,c/c++ development engineers

operation, improve the practical ability of students, the introduction of real development projects, in accordance with the standard process of enterprise development, training the actual development of the students ability. This just makes up for the traditional way of education, practically zero hands-on practice training. Therefore, compared with the traditional exam-oriented education, software training institutions are more professional, which shortens the distance between job-seekers and

Investigation on the survival status of 2015,c/c++ development engineers

students real operation, improve the practical ability of students, the introduction of real development projects, in accordance with the standard process of enterprise development, training the actual development of the students ability. This just makes up for the traditional way of education, practically zero hands-on practice training. Therefore, compared with the traditional exam-oriented education, software training institutions are more professional, which shortens the distance between jo

The usage of case when and SELECT case, the numeric parameter in the SUM function (turn) __ function

> 1000 THEN1 ELSE 0 end Else 1 end = 1) If the condition of the female staff is check:constraint check_salary check (sex = ' 2 ' and Salary > 1000), the male staff cannot enter it. four, depending on the condition of the selected update. For example, there are the following update conditions 1. Staff with a salary of more than 5000, the salary is reduced by 10% 2. Employees with a salary increase of 2000 to 4600. It is easy to consider the option to execute the two UPDATE statement as foll

Calculate Personal income Tax! Switch statement

The purpose of the machine: learn to use circular control statements to solve practical problems On the machine content: Write a multi-branch selection structure program, according to individual monthly income, calculate the tax payable and after-tax income. /* * Copyright (c) 2012, Computer College, Yantai University * All rights reserved. * Author: Xu Benxi * Date of Completion: October 27, 2012 * Version Number: v1.0 * Input Description: Total monthly income of individual * Problem Descriptio

Bootstrap the progress bar _javascript skills you must learn every day

1. Progress bar In Web pages, the effect of a progress bar is not uncommon, such as a scoring system, such as loading status. As shown in the following illustration of a scoring system, he is a simple progress bar effect: The progress bar, like other standalone components, allows the developer to choose the appropriate version for its own needs: ☑less Version: source file progress-bars.less ☑sass Version: source file _progress-bars.scss ☑ compiled version:bootstrap.css file No.

The PID of the libraries of Ardupilot

to 0 and the last differential value to NanLoad Gain Properties///void Load_gains ();Save Gain Properties///void Save_gains ();Sets filter Alpha for D-term LPFvoid Set_d_lpf_alpha (int16_t cutoff_frequency, float time_step); Calculate filter coefficients PID Constructor (slightly) float get_pid (float error, float scaler = 1.0);//Calculate the output of the PID controller, similar to the method used above, Different points 1. If two times the calculation time is greater than 1 seconds, then

Test whether the port of the UDP service is available

the link is ok. probe UDP port does not pass, use the following parameters:Nc-vuz 112.91.151.10 4500 If the pass, shown as follows: [112.91.151.10] (ISAKMP) Open If the port is not through, it is displayed as follows: 112.91.151.10:inverse Host lookup failed: (UNKNOWN) [112.91.151.10] 4500 (IPSEC-NAT-T): Connection refused However, it should be noted that if the firewall is turned on, the firewall will

Basic operation of MySQL database under Linux

databaseMysql> SELECT * FROM Employees; -Query all field contents of table employees, select is Query commandmysql> SELECT datafields from table; -Query the field list datafields the specified content (between fields with "," split). The three commonly used filter modifiers are as follows:WHERE: Displays a subset of the data rows that meet certain criteria. such as:mysql> SELECT * FROM Employees WHERE salary > 40000;ORDER BY: Displays the data rows in the specified order.LIMIT: Displays only a

Case in SQL and then else end usage

* 0.9WHERE salary >= 5000;--conditions 2UPDATE personnelset salary = salary * 1.15WHERE Salary >= and Salary But it's not as simple as it is supposed to be, assuming a personal salary of 5000 bucks. First of all, according to condition 1, wages are reduced by 10% to 4500 of wages. Next run the second SQL, because this person's salary is 4500 in the range of 2000 to 4600, need to increase 15%, and finally t

Oracle Process Statements

--Process statementsSELECT * from Wan3;--three-segment first-write fixed structure declare begin endDeclareA VARCHAR2 (6): = ' ere ';BeginDELETE from Wan3 WHERE ename=a;End--DECLAREV_deptno number;V_dname VARCHAR2 (100);BEGININSERT into WAN3VALUES(' hFE ', 15,5411,sysdate,null,null);END;--Conditional statement if case--Pay attention to the type problem of variable namingDeclareV_ename VARCHAR2 (6);V_sal Wan3.sal%type; --can be used with a known type of keyword%BeginSelect name into V_ename from

Go Dynamic SQL detailed in Oracle

100 Jacky 5600 101 Rose 3000 102 John 4500 Requirements:1. Create the table and enter the appropriate data.2. Information about their name and salary can be queried based on a specific ID.3. The employee information is based on a query that is larger than the specific salary.Depending on the previous requirements, you can create three procedures, each using dynamic

Oracle Select Case

statements as follows --Condition 1 UPDATE personnel SET salary = salary * 0.9 WHERE Salary >= 5000; --Condition 2 UPDATE personnel SET salary = salary * 1.15 WHERE Salary >= and salary But it's not as simple as it is supposed to be, assuming a personal salary of 5000 bucks. First of all, according to condition 1, wages are reduced by 10% to 4500 of wages. Next run the second SQL, because this person's salary is

SQL custom Functions, separators

--------------establishing a stored procedureCREATE function [dbo]. [Split](@str varchar (4500),@sep varchar (1))Returns @t table (id int identity (), Col varchar (4500))AsBegin--Defines the current position, delimiter start and string length, and the currently acquired stringdeclare @posi int, @start int, @str_leg int, @gchar varchar (2), @mingzhong intSet @str_leg =len (@str)Set @posi =0Set @start =0Set @

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