echo "$name would be is full: $used%" fi don E
Special usage 双小括号方法,即((…))格式,也可以用于算术运算 双小括号方法也可以使bash Shell实现C语言风格的变量操作 I=10((I++)) for循环的特殊格式: for ((控制变量初始化;条件判断表达式;控制变量的修正表达式)) do循环体 done控制变量初始化:仅在运行到循环代码段时执行一次 控制变量的修正表达式:每轮循环结束会先进行控制变量修正运算,而后再做条件判断 for ((i=1;i
Exercise: Create a la carte system for a restaurant with a shell.Executes the script, which lists the main menu, as followsWhat would you like to eat?1) Rice2) face3) Dumplings4) do
continue fi done11.break跳出整个循环break [N] 提前结束第N层循环,最内层为第一层while command1do if command2 then break fidone12.shiftShift [N]Shifts the list of parameters to the left by the specified number of times, by default to the left. Once the list is moved, the left-most parameter is removed from the list.#!/bin/bash#step through all the positional parametersuntil [ -z "$1" ] do echo "$1" shiftdoneecho13.selectselect variable in list do 循环体命令 doneThe
(string)Class.forName (String): Loads the class and performs class initialization; the second parameter can be Class.forName (string, Boolean, ClassLoader) to simply load a class without initializing;Classloader.loadclass (String): Loads the class only, does not perform class initialization; PS2: Sometimes you see this usage:Class.forName ("Com.mysql.jdbc.Driver"). newinstance ();This is not necessary, as described above, static initialization has been new to a driver object, register to Driver
Zen CodingAn editor that simplifies the compilation of HTML, XML, XSL (or other such formats ). It mainly uses an abbreviated syntax to write a large number of repeated and tasteless HTML, much like CSS syntax. The following is an example:
div#page>div.logo+ul#navigation>li*5>aAfter expansion, it will look like the following:
It can be seen that # represents ID,> represents the next layer. If you write:
select>option#item-$*3Then you will get:
It looks good. Currently, it supports the following
multiple platforms, this makes it very popular in independent game production groups outside China.
The difference between the U3D free version and the Professional version lies in the permission to use the screen filter and the underlying class library. The U3D free version can also create a complete game and publish games on PC, MAC, and Web platforms, the mobile platform (IOS, Android) and the next generation of game consoles (PS3, XBOX360, Wii)
This story uses kernel code 2.6.22. In the Linux kernel code directory, all the Code related to the device driver is under the drivers/directory. Using the ls command in this directory, you can see many subdirectories:
Lfg1:/usr/src/linux-2.6.22/drivers # ls
Kconfig acpi atm block char cpufreq dma fc4 hid ide
Input leds md mfd mtd oprofile pci ps3 s390 serial spi
Usb zorro Makefile amba auxdisplay bluetooth clocksource crypto
Edac firewire hwmon
price of GPS integration will not be very expensive when gPhone is listed. At the same time, Google is developing a base station-based positioning technology-MyLocation can more quickly locate the location and the former GPS location takes about 1 minute compared to the base station location faster.
2. Media APIs Multimedia Interface
The Android platform integrates many audio and video decoders and related multimedia APIs. With these APIs, manufacturers can enable mobile phones to support MP3,
3D games in the future? The cost for converting from 2D to 3D is very low with Unity3D.
2. Rich plug-ins.
3. Mature tools and powerful editor extensions allow you to easily customize the editor suitable for your project.
4. Powerful built-in performance analysis tools.
5. Almost all mainstream platforms are supported: WEB, Win, Mac, IOS, Android, XBox, PS3, and Wii.
6. Unity5 has a better lighting system, UI architecture, and support for Html5 releas
Brother I'm back again, haha · Haven't come to write a blog for a long time, now slowly make up the former! Recently learning Python, so you will update some of the problems encountered in learning.Today's content is the function of a simple script written before the shell is implemented with Python: Select the corresponding menu item and print the status information of the current system.No more wordy, on the code:#!/bin/bashuser () {echo "User login record:" echo "' Last '"}ifcfg () { echo "n
. From the above results, we can see that each JSP file corresponds to a JspClassLoader, And the JSP page of the web application shares a TagFileClassLoader.
Let's look at EJB again. The first three layers of classloader are the same as those of the web application. Basically, GenericClassLoader is used to load the internal classes of weblogic products, and the first two layers are used to load JDK classes, the specific situation will be discussed later.
Weblogic11g p3 is also about 10.3.4 (orac
Data Type
Ps1: int I = Integer. parseInt ("123 ");
Note: This method can only be used to convert strings into integer variables.
Ps2: float f = Float. valueOf ("123"). floatValue ();
Note: In the above example, a string is converted into a Float object, and then the corresponding float value is returned by calling the floatValue () method of this object.
Ps3: boolean B = Boolean. valueOf ("123"). booleanValue ();
Note: In the above example, a string
Article title: Linus Linux kernel 2.6.16 supports Cell chips. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
According to the latest foreign media reports, Linus Torvalds (Linus Torvalds) recently released version 2.6.16 of the Linux kernel. The new version supports IBM Cell processors, including Oracle Cluster database software, at the same time, it further
in the command line. $ PS2 second prompt, when you need additional input, you will see it. "> ". the third prompt of $ PS3 is displayed in a select Loop (see example 10-29 ). $ PS4 fourth prompt: when you use the-x option to call the script, this prompt will appear at the beginning of each line of output. "+" is displayed by default ". $ PWD working directory (your current directory), which works the same as the built-in command pwd. $ REPLY when no
Corona by Ansca
Development language: Lua
Development tools: Download Corona SDK, Lua editor of your choice
Links: http://www.anscamobile.com/corona/
Pros: Create a complex game tool
The Corona SDK is a force-created tool for creating complex games! Look at the tempting games on the official web! Anyway, I love it! With Corona, you can create some refreshing games at a low cost with just a few lines of code! It has libaray, which provides the game's physical engine
different opinions on the privacy realization in the software does not prove another person's mistake.
RMS said that a major advantage of free software is that the community protects users from malware, but now Ubuntu GNU/Linux has become a counterexample. Malicious use of private software: malicious use of spyware codes to monitor users, DRM to restrict users, and backdoor remote control programs. RMS, for example, Windows, apple I series, and Amazon Kindle all contain three malicious feature
xtrace
Then run shell.
Or directly execute
# Ksh-x shellprog args
Or
# Sh-v shellprog args
Debug a function
# Typeset-ft funcname
Prompts (prompt)
PS1 main shell prompt (the default is $ for common users, and the default is # for root users #)
PS2 continue prompt (default>)
What is a continue prompt?
Enter
For I in 11 12 13 14 15 16
Do
Lspv hdisk $ I
Done
Starting from the second line, the leftmost side of the screen is to continue the prompt.
The selection prompt of the
)
{
Return comparer. GetHashCode (keySelector (obj ));
}
}
Distinct extension method:
Public static class DistinctExtensions
{
Public static IEnumerable
{
Return source. Distinct (new CommonEqualityComparer
}
Public static IEnumerable
{
Return source. Distinct (new CommonEqualityComparer
}
}
With optional parameters, the two extension methods can also combine one:
Public static IEnumerable
IEqualityComparer
{
Return source. Distinct (new CommonEqualityComparer
}
(Likewise, the two constr
= freeStore; freeStore = p;}
To avoid any conflicts with the Members defined in the derived class, explicitly specify that we are assigning values to the base class member next.
7. Define static data members
template
std::allocator
CachedObj
::alloc_mem;template
T *CachedObj
::freeStore = 0;template
const std::size_t CachedObj
::chunk = 24;
As usual, for static member
assumed to be A//sibling to the "foo" Directory.define ([ "My/cart", "My/inventory", function (cart, inventory) {//return a function to define "Foo/title". //it Gets or sets the window title. return functionreturn title? (window.title = title): Inventory.storename + "+ Cart.name;}} );Reviews: After loading the module, the return value is a closure.Simple packaging Commonjs to define modulesIf you have existing code that is written in the COMMONJS module format that is difficult to refactor us
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