Use VI Editor to delete copy or move multiple lines of text under Linux

First, delete multiple linesSingle-row deletion,: 1 (line number to be deleted) dMulti-line Delete,: 1,10dDdDelete the cursor in the rowNddDelete n rows starting at the current lineDwDeletes a character starting with the current characterNdwDeletes

Why does the tool app have to be a community?

Non-famous program ape astringent Lang The non-famous programmer, the word Zhong straight right, the number astringent lang. Love machine, love programming, is crawling in the mobile Internet in a yard craftsman! Personal number: LOONGGG,

Android Implements Night Mode summary

As the app realizes more and more functions, watching the novel watching video online and so on, many people now spend more and more time on mobile devices such as mobile phone tablets. But the phone and tablet screen is not as engaging as the

Android uses JNI to implement serial communication with C language Operation Bluetooth hardware module

Always wanted to write a technical document, but because the ability to self-inductance is limited and can not be written, recently made an Android platform to achieve and C language communication to operate the Bluetooth module project, the middle

Dialog specific conditions on Android 2.x cause a bug that cannot be dismiss

Recently in a simple dialog frame, the role of making a display effect on Android 2.x to Android 4.x are similar to the dialog box.The idea is relatively simple, is the use of Decorative mode wrapping dialog, exposed interface calls will be

Cisco IOS is removed, how to recover via tftp

Cisco iOS is removed, how to recover via TFTP1 , install the TFTP software on one of the servers, and then place the iOS file in the default root directory of the TFTP server. 2 , connect the control line to the router, and connect the machine's

MQTT protocol iOS Port porting 2

MqttFramework.h#import #import "MQTTClient.h" #import "BusinessModuleProtocol.h" #import " BusinessFramework.h "#import" AppDelegate.h "@interface mqttframework:nsobject{businessframework *businessframeworks_;} /** * @brief The settings of the

Android Development Tip 6--Spinner

Reprint Please specify source: http://blog.csdn.net/crazy1235/article/details/70903974Set Spinner Text CenterBy default, the effect of the spinner control is this: What do I do if I want to center text??? Set in the layout

iOS Tiered architecture Design

As we all know, there are many modes in mobile design development, the most common one is the single example design mode, MVC design pattern, factory design mode, KVO, notification, agent and so on. The purpose of using design patterns: For code

paping use to test Unicom & website The inability to communicate problem due to TCP protocol timeout problem

1. Use paping to test the connectivity Linux platform:wget http://www.updateweb.cn/softwares/paping_1.5.5_x86-64_linux.tar.gzOrwget https://zhangtaostorage.blob.core.chinacloudapi.cn/share/paping_1.5.5_x86-64_linux.tar.gzThis is a compressed package,

Android asynchronous load full resolution large map processing

Android asynchronous load full resolution large map processingAn important part of asynchronous loading is the processing of images, which is why we used to load images asynchronously earlier.On the one hand, due to bad image processing will occupy

Android successfully uses GPS to get current geolocation (resolve getlastknownlocation return null)

Recently encountered a tricky problem: using GPS to locate the current location is not available, that is, the Getlastknownlocation method always returns NULL. Later, a blog post getlastknownlocation () returned null resolution helped me a lot, here

Create a map using log data in slam_gmapping

This paper introduces the use of the TF transform and laser scan data of the robot to build a 2D map. The dynamic creation process of the map is observed by re-replaying the recorded data as input of the robot's real sensor in the Rviz of the Ros

Android Basics---Rewrite system crash processing class save upload and Perfect Exit program method

Android phone models and versions on the market today are too many to fully adapt to almost impossible, then how to get other players error information! Here we are going to redefine the crash processing class for the system.First we create a new

Android App Stress test (i)---monkey introduction and basic use

Objective: a long time ago, I heard of monkey, but what is monkey to do, how to use it, we still have the simplest problem to start learning it;PS: my blog post format has changed, read a lot of blog post, found that this style reading is very

Front-end: The difference between mobile and PC

Several interviews in Ali, always asked what the difference between mobile and PC side, when the answer is mainly answered in the compatibility, speed, adaptation, page layout and other aspects of the difference, but still very not system, so here

Several ways Android uses Alpha to achieve gradient effects

Principle: The gradient effect is achieved by changing the alpha value of the control transparencyMethod One: Using XMLStep one: First, we want to create an. xml file in the Anim folder under the Res folder (here I created Alpha.xml)Set start

Introduction to KVC and KVO in iOS development

In iOS development, KVC and KVO are often used. You can use KVC to assign values to an object's properties and get the object's property values, and you can use KVO to listen for changes in the object's property values. A brief introduction to KVC

Makfile in Android

What is makefile? Maybe a lot of WINODWS programmers don't know this stuff, because those Windows Ides do the work for you, but I think it's a good Android bottom-up programmer.Makefile still have to understand.Especially under the UNIX software

iOS Open source project weekly 0428

The 18th issue of the iOS Open Source project Weekly was released by Opendigg. Our iOS Open source Weekly is a collection of Opendigg's high-quality iOS open-source projects for a week, which makes it easy for iOS developers to find the tools they

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