1. $ related parameters in bashCopy codeThe Code is as follows:$0-indicates the current file name$ *-Separate all parameters with spaces to form a string$ @-Separate all parameters with spaces to form a string combination. Different from $ *, when being referenced by "", "$ *" is a string, while "$ @" contains multiple strings.$ #-Number of parameters passed to the Process$? -The execution result of the previous command. The value is 0 if no error occurs.$-PID of this command2. bash technique, w
This is a creation in
Article, where the information may have evolved or changed.
This was a progress report on the Go toolchain improvements during the 1.7 development cycle. All measurements were taken using a Thinkpad x220, Core i5-2520m, running Ubuntu 14.04 Linux.
Faster compilation
Since Go 1.5, when the compiler itself is translated from C to Go, compile times is slower than they used to be. Everyone
1. $ related parameters in bash
Copy CodeThe code is as follows:
$ A-Indicates the current file name
$*-Separates all parameters with a space, forming a string
$@-Separates all parameters with a space, forming a string combination. Unlike $*, "$*" is a string while "$@" contains multiple strings when referenced by "".
$#-Number of arguments passed to the process
$? -The execution result of the previous command, 0 if there is no error
$$-PID of this command
2. Bash techniques, variable names th
1. $ related parameters in bash
Copy codeThe Code is as follows: $0-indicates the current file name
$ *-Separate all parameters with spaces to form a string
$ @-Separate all parameters with spaces to form a string combination. Different from $ *, when being referenced by "", "$ *" is a string, while "$ @" contains multiple strings.
$ #-Number of parameters passed to the Process
$? -The execution result of the previous command. The value is 0 if no error occurs.
$-PID of this command
2. bash tech
This article describes some tips for Linux.Author: JH Gao It has been five years since I first came into contact with Linux. Like everyone else, I have to deal with it. Once in a while, I will record the method. Now I will briefly summarize it.Therefore, the command function can be used by man. I only list what I think is commonly used.1. $ related parameters in bashShell code
$0-indicates the current file name
$ *-Separate all parameters with spaces to form a string
$ @-Separate all paramet
: yypropertychangedobject {private observablecollection Class diagram:
The final interface's XAML code:
The following section of XAML. CS:
Using system. windows; using system. windows. controls; namespace collectionbinding {public partial class mainpage: usercontrol {companyviewmodel c = new companyviewmodel (); Public mainpage () {initializecomponent (); this. loaded + = new routedeventhandler (mainpage_loaded);} void mainpage_loaded (Object sender, routedeventargs e) {// forge some data and te
configuration of the update source, and then go in the installation.Pure installation, does not update, does not pack the language pack, installs quickly quickly.Well, especially with USB3.0, 10 minutes to complete the whole process.Failure of Ubuntu 12.04This is an off-topic, but I'm really disappointed. Friends of the computer, ThinkPad x220,core 2620,4g memory, Windows7 run, notebook completely do not f
from:http://jj.isgeek.net/2011/09/install-pil-with-jpeg-support-on-ubuntu-oneiric-64bits/I am posting this because it took me ages to the figure out how to solve this one.I could not get PIL to compile with JPEG, Zlib or FreeType in my virtualenv. I am using Ubuntu oneiric Beta1 on a Lenovo Thinkpad X220. That's a 64bit installation.As read in every blog post off there, you first need to install the system
touchpad.
Unfortunately, not all of the notebook's touchpad icons can be easily detected. The author has never found the icon of touchpad status in Lenovo ThinkPad X220 notebook, or found an icon representing touchpad status after searching the Internet.
If the touchpad failure problem has not been resolved, the user can view the Touchpad settings. Users can enter "Mouse settings" (mouse sett
transformation, which let me pay attention to, want to re-review (learning) this knowledge point. Also searched a lot of blog posts, but did not specify the downward transformation, just gave an example of how to use, instead of upward transformation spoke a bunch (maybe I did not find).This blog is about the downward transformation, then we will learn the downward transformation, to understand the significance of this feature and the use of the sceneCreate an electronic product interface as fo
traditional BIOS password protection.
IBM Notebook Password Detailed
Applicable models:
All ThinkPad 380; all ThinkPad 380D; all ThinkPad 380ED; all ThinkPad 380XD; all ThinkPad 380Z; all ThinkPad 560; all
.
Open or restart the computer;
When you see the Dell icon, press the "F2" button to enter the system setup (BIOS) immediately;
Each brand notebook computer enters the BIOS method
IBM (Cold Boot Press F1, part of the new number can be restarted when the press F1)
1.ThinkPad 315ED
After the boot, when you see the screen on the ThinkPad logo, quickly press the F2 key to enter the BIOS.
2.
Motivation : In an object-oriented system, some objects are subject to some reasons (for example, the overhead of object creation is large, some operations require security control, or external access is required ), direct access may cause a lot of trouble to the user or system structure. How can we manage/control the unique complexity of these objects without losing transparent operation objects? Adding an indirect layer is a common solution in software development.
Application: Remote Obje
on the list. Slatebook 14 runs the Android system, and such Android notebooks are not common in the market. Although the Android operating system built for mobile platforms has some productivity gaps compared to desktop operating systems such as Windows and OS X, the test Slatebook 14 of the time to 6 hours and 52 minutes, easily surpassing many windows laptops.
And it is worth mentioning that the proposed retail price of Slatebook 14 is only 430 U.S. dollars (about 2628 yuan), and the current
teach you step-by-step to build a Docker-based MongoDB replication cluster environment
1. Installing Docker
2. Create a MongoDB image
3. Building a MongoDB cluster
This article ——-chain--Connecthttp://blog.csdn.net/pddddd/article/details/46893593
Docker is an open-source application container engine that allows developers to package their applications and dependencies into a portable container.
1.ubuntu14.04 Installing Docker
Reference Document http://docs.docker.com/installation/ubuntulin
Motivation : ThinkPad has multiple models, such as T43 and t60. Each model supports multiple working modes. Each model has different implementations in different modes. With the continuous development, there are more and more models and working models. How to separate ThinkPad from the changes in model and working mode so that they change independently, without introducing additional complexity (the complex
Typical linux commands: 1. sagane @ sagane-ThinkPad-Edge :~ $ Mii-tool: when the network is disconnected, use this command to check whether the physical link is normal. 2. ssagane @ sagane-ThinkPad-Edge :~ $ Sshroot@192.168.1.43, with the root user login IP address as 19 .. linux commonly used commands Classic use 1, sagane @ sagane-ThinkPad-Edge :~ $ Mii-tool: w
About IBM random start options (which retain those deleted)
About IBM random start options (which retain those deleted)The following figure shows the startup options after the random software is installed (it is clear to see the solution by the optimization master)
1 digital line Detect-is part of BVR telephone software kits. It provides fax, phone book, email, and other functions (which can be deleted)2 Bluetooth control disk-you can delete it if you do not need Bluetooth3 tpkmaphelper-IBM
: ThinkPad, Password: Lenovo
Useradd thinkpad-p lenovo-s/bin/bash
Su ThinkPad
Enter Password: Lenovo
The first Su ThinkPad succeeds because the current account is root and Su ThinkPad does not require password verification
The second Su
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