naming

问题 Basically when I have a python file like: python-code.py and use: import (python-code) the interpreter gives me syntax error. Any ideas on how to fix it? Are dashes illegal in python file names? 回答1: You should check out PEP 8, the Style Guide for Python Code: Package and Module Names Modules should have short, all-lowercase names. Underscores can be used in the module name if it improves readability. Python packages should also have short, all-lowercase names, although the use of underscores

问题 Which is the correct name for a system which stores versions of source code, like SVN or TFS? I've always called it source control, but places like Wikipedia calls it revision control? To make this more complicated sites like this one have a tag for both? 回答1: Revision Control is the more generic term, used for source-control tools but also for other tools (Word, OpenOffice, ...). It references a version. Source Control offers revision control with branching and merging which are not always

问题 This program reads from a file and creates a Tunnel object for the data on each line of the file. The specifics of the program don't really matter. The output will make it clear the problem I am having. Every time I append a new Tunnel (named temp) to the list, all the old Tunnels (also named temp which were created in previous iterations of the for loop) are changed to the new Tunnel temp. If that is confusing, please scroll down and read the output. class Tunnel: #I am using the data from

问题 Here is a bit of code that I have to write sometimes, mostly in conjunction with UI stuff, and always with events that can accidentally wind up in infinite loops. public class MyClass { public event EventHandler MyEvent; private bool IsHandlingEvent = false; public MyClass() { MyEvent += new EventHandler(MyClass_MyEvent); } void MyClass_MyEvent(object sender, EventArgs e) { if (IsHandlingEvent) { return; } IsHandlingEvent = true; { // Code goes here that handles the event, possibly invoking

问题 I just found this while browsing through the Swift module headers: protocol _ObjectiveCBridgeable { Similarly: protocol _SequenceType { Coming from an Objective-C background, this seems highly unconventional to me. The underscore _ usually implies that the concerned entity is private, and is often hidden in terms of header visibility. Why is it that in Swift they are publicly visible? Have the naming conventions changed for Swift? 回答1: It seems that the conventions have changed as far as

问题 I'm writing this code where you give the the program a name. Java is telling me that the else in the statement is never used when it should be used if the variable "isACoolGuy" is false. if (isACoolGuy = true){ System.out.println("Thank you for this name... "+ name); }else if(isACoolGuy = false){ System.out.println("Okay im changing my name since you are an idiot"); name = name = "jack"; System.out.println("My name is "+ name + " now"); There is a switch statement earlier that should change

问题 I just noticed that my newly created sstable folder has a combination of numbers and letters attached. For my table "tweets" it looks like: /var/lib/cassandra/data/twitter/tweets-a6da23906d8211e8a057ffb9a095df5c on the disk. Does anybody know what this attached hash is? Thanks! Christian 回答1: The folder name consists of table name, and table ID that is generated anew every time when the table is created - this is done to prevent race condition when table created, dropped, created, etc. 来源：

问题 I am trying to create a zip of all files in abc folder with the name filename.zip using following command in php like: exec(tar -cvf filename.zip /home/public_html/uploads/abc/) but the created zip has the folder structure home/public_html/uploads. Please help me to get rid of these folders. 回答1: exec("tar -cvf filename.zip -C /home/public_html/uploads/ abc/") Note the space before 'abc/'. The -C switch tells tar to first change directory to /home/public_html/uploads and then compress 'abc'

问题 I call for collective wisdom on this one. I am having the following extremely weird bug. I have a model named File.php. I have used it in several places in my app. But now it doesn't seem to work. In this case, it works in my Template.php: $this->Behaviors->load('Containable'); $this->contain( array( 'User', 'TemplatesUserType' => array( 'UserType', 'FilesTemplatesUserType'=>array('File') ) ) ); $template=$this->find('first',array('conditions'=>array('Template.id'=>$template_id,"Template.user

问题 Is there a way in PHP to name my specifiers like in Python? I want this in PHP: $foo = array('name' => 24); printf("%(name)d", $foo); I couldn't find nothing related on google or in the php manual. 回答1: Nice question! You can roll your own without too much trouble by working with regexes. I based the implementation on the idea of calling vsprintf, which is closest to the stated goal among the built-in printf family of functions: function vsprintf_named($format, $args) { $names = preg_match