chef hierarchy

Get all hierarchies of UIView in iOSApplication ScenariosIn real IOS development, there are many times when you need to know which child controls are contained in a UI control, and to understand their hierarchies and their own frame and bounds, so that we can complete a complex UI layout, and the following code makes it easy to get all the hierarchies of a UI control, Use it to calculate, then write the result to the local disk, and export it to an XML file, so that we can visually see its inter

Basic SelectorDescription: Find DOM elements by element ID, class, tag name, etc.1.id selector: $ ("#test");//select element with ID Test 2. Class Selector: $ (". Test");//Select all elements of class test, other: $ (' Div.mini ') 3. Tag Selector: $ ("div");//Select all Hierarchy SelectorDescription: Gets specific elements, such as descendant elements, child elements, adjacent elements, sibling elements, through a hierarchical relationship between DOM

")//combination selector by tag name $ (" . Class,p, Div ")Hierarchy SelectorDescendant selector $ (". Outer div") //descendant selector $ (". Outer>div") //Adjacent selector $ (". Outer+div")// brother selector (rear brother tag) $ (". outer~ Div ")Basic filtersThe first $ ("Li:first") //Index is 2 ("Li:eq (2)")//index value is even $ (" Li:even")//index value is odd $ ("li:odd")//index value is greater than 1 of $ ("LI:GT (1)" )//index value

This article turns from: http://blog.csdn.net/lxl_815520/article/details/51172917, overviewThe system architecture of iOS is divided into four tiers: the core OS layer, the core service layer, the media layer, and the Cocoa touch layer. Understanding the system architecture of iOS is a great help for our daily development. iOS is UNIX-based, so we can trust this operating system, knowing that it is much better than other operating systems from the stability of the system.Second, the iOS OS

recordedIgnoreboth: Both of the above featuresFiles starting with. Are hidden files, using ls-a to viewVariables in the shell are assigned values:Variable name = valueNote: variable names do not need to be preceded by the $ sign when assigning valuesVariable names can only contain numbers, letters, and underscores, and cannot start with a numberVariable names are case-sensitiveTry to see the name and the meaningFHS: File Hierarchy Standard/bin stores

FHS definition: filesystemhierarchystandard, File system hierarchy standard .rootfs: root file system ./boot: the relevant file storage path required for system startup vmlinuz: Kernel file .initrd: disk impression file, a small Linux kernel file that needs to be loaded when the system starts. grub (BootLoader): Boot loader ./dev: device file storage path Block devices: random access, access to organized data block access . For example: Disk char

This post mainly describes how to use command management Linux the file, first we look at Linux File Hierarchy of file system:650) this.width=650; "title=" QQ picture 20151209170115.png "Src=" http://s4.51cto.com/wyfs02/M00/77/73/ Wkiom1zn7fxb4zlvaablmphtp54255.png "alt=" Wkiom1zn7fxb4zlvaablmphtp54255.png "/>Directory types are: Static, dynamic, or variable, persistent, runtimeHere is a detailed description of the role of each file:/bin Binary execut

One: Cause(1) recently in the Java Processing analysis of various data, encountered some anomalies, such as the parse () exception parseexception,valueof () numberformatexception IllegalArgumentException abnormalities, nullpointerexcetion indexoutofboundsexceptionfilenotfoundexception, etc.(2) exception can not be arbitrarily captured, can not be arbitrarily write catch (***exceptionex) {}; only, it is possible to throw the corresponding exception before writing Catch , otherwise the extra catch

deep parsing of the hierarchy of I/O programming streams Reprint please indicate source:http://blog.csdn.net/u012637501( embedded _ small J Sky ) most applications require data exchange with external devices, and the most common external devices include disks and networks. The so-called I/O (input/output abbreviation), refers to the application of these devices data input and output . In the program, the keyboard is treated as an input file, and the

/* Recursive and non-recursive form *///***************void preOrder1 (binarytreenode* proot) {if (Proot==null) return for the back/hierarchy traversal in front of the two fork tree; cout　　Recursive and non-recursive forms of back/hierarchy traversal in front of a binary tree (c + +)

File structure-run.py-B--__init__.pyrun.py1 ImportLogging2 3 Importb4 5Log = Logging.getlogger ("")6 7TMP = logging. Filehandler ('Log.txt')8 Log.addhandler (TMP)9 TenLog.warning ("123") One ASample =b.b () - PrintSample.foo ()__init__.py1 ImportLogging2 3Log = Logging.getlogger ("b")4 5 classB:6 def __init__(self):7 Pass8 9 deffoo (self):TenLog.warning (1111) One return "Foo in class B"The AddHandler in run.py can act on a file under package B because GetLogger ("B) wil

1.2. Data structure of tables in database3. Front Page id= "pid" runat= "Server"> value= "0" data= "|0|" > do not select parent class option> Select >Note: View source code4. Backstage Codeusing System; using System.Data; using System.Web.UI.WebControls;// binding drop-down frame with hierarchy (select control) Binddropdownlist (0"┗━""|0| "); /// ///tie-down frame with layers/// /// Parent class Number ///

1, open the computer today to find MyEclipse the package hierarchy of the project into a flat, flat mode, this model feels particularly bad, can not clearly show the package hierarchy structure of the project. The following figure: 2, Solution: In this way, show the package structure is not obvious enough, we can tune into a more comfortable hierarchical mode (layered mode), through the Windows--navigati

Reference to:http://blog.csdn.net/liujinlongxa/article/details/46490949ObjectiveDo iOS development often meet this situation, product Wang take what you do come to say: "This label font size is not correct, my Rimingming labeled 20px, this size is certainly not 20px", so you argue with him, my code is really 20px, in order to prove your judgment, So you drive in the code to find where to set the font. Then there is a problem, if the code is you write, you may be able to quickly locate the corres

In this blog post, I will introduce the layering of the JFrame window. JFrame inherit from frame, with JFrame, JDialog, JApplet are heavyweight components. If you don't figure out the hierarchy of a frame, you'll get an error when setting some special effects on the component, such as setting the background.Frame Hierarchy Chart:Each top-level container has a hidden intermediate container called root Pane.