rails cookbook

IOS Game Development Cookbook, ioscookbook "/>Book Description Want to build games with iOS technologies? This cookbook provides detailed recipes for a wide range of common iOS game-development issues, ranging from 2D and 3D math to Game Center integration, and OpenGL to performance. if you're familiar with iOS and Objective-C, this is the problem-solving guide you want. Rather than focus on specific game

About Ruby on Rails Ruby on Rails is an application stack that provides developers with a framework to quickly create a variety of Web applications. ruby on Rails does take a little while to install on a virtual server, but luckily there are a lot of helpful tools to make this process as easy as possible. you can run this tutorial on your droplet as a user with S

DBecause if 2 different keys correspond to the same value, one of the 2 keys will definitely disappear for the 2 functions given by the solution.Thus the generated pseudo-inverse dictionary length will be shorter than the original dictionary length, in any case, only if the value in D is hashed, then the previous function will work properly, otherwise the function would give a TypeError exceptionThis function obtains the Iteritems method to generate a pair of keys and other corresponding values

perform mathematical operations that contain fractions.>>> from fractions import fraction>>> a =fraction (5,4) >>> B = fraction (7, +) >>> AFra Ction (5, 4) >>> bfraction (7) >>> print a+b27/16>>> print a*b35/64 numerator denominator >>> c= a*b Gt;>> c.numerator35>>> c.denominator64 Convert to decimal >>> float (c) 0.546875 limit denominator >>> c.limit_ Denominator (8) #分母不超过8的最接近的分数Fraction (4, 7) float converted to fractions >>> x=1.75>>> y = fraction (*x.as_integer_ Ratio ()) >>> yfraction

(Task); Thread.setuncaughtexceptionhandler (NewExceptionhandler ()); Thread.Start (); }} Public classTaskImplementsRunnable {@Override Public voidrun () {Integer.parseint ("TTT"); } }When an exception is thrown in the thread, the JVM first checks to see if the thread has set the thread exception handler and, if there is one, calls the processor to handle the exception. If not, the default behavior of the JVM is to print the thread stack information to the console while the program is roll

strings:S[::-1]Reverse the word only:Import reRev = Re.split (R ' (\s+) ', ' Hello World hahaha! ‘)Rev.reverse ()Rev = '. Join (REV) #要用空字符来join because the space is already in the cut listReturns all elements in a that are not part of B:Set (a). Difference (set (b))Translate method:Import strings = ' Hello world! 'Table = String.maketrans (' abcde ', ' 12345 ') #先生成对照表S.translate (table) #依照对照表进行替换操作S.translate (table, ' wor ') #替换后, delete characters containing worIf you want to delete only,

Chinese version of ActionScript 3 cookbook Download in PDF format (Full Version) Happy learning! 2008.01.25 update This article is declined without consent Chapter 1. Basics of The ActionScript Language Chapter 2. Custom classes Chapter 3. Runtime Environment Chapter 4. Numbers and mathematics Chapter 5. Array Chapter 6. Visual Object List (directory) Chapter 7. Drawing and masking(Directory) Chapter 8. Bitmap (directory) Chapter 9. Text (directory

The iPhone developer's cookbook Reading Notes, I will translate them slowly. PropertyOC automatically builds methods when you @ synthesize properties. notice the capitalization of the second word in the set method. by convention, OC expects setters to use a method named setinstance: where the first letter of the instance variable name is capitalized. Property attributesThe default behavior for properties is assign. Setting the property's attribu

The official release of the Simplified Chinese version of the event 3.0 cookbook in the event of a short period of time was announced. This is undoubtedly a great deal for colleagues who like flash and like as. Now let's get started first.Chapter 1. Basics of The ActionScript LanguageChapter 2. Custom classesChapter 3. Runtime EnvironmentChapter 4. Numbers and mathematicsChapter 5. ArrayChapter 6. Visual Object ListChapter 7. Drawing and maskingChapte

class Temperature(Object): coefficients={‘c‘:(1.0,0.0,-273.15),‘f‘:(1.8,-273.15,32.0),‘r‘:(1.8,0.0,0.0)} def __init__(self,**kwargs): try: name,value = kwargs.popitem() except KeyError: name,value = ‘k‘,0 if kwargs or name not in ‘kcfr‘: kwargs[name] = value raise TypeError,‘invalid arguments %r‘ % kwargs setattr(self,name,float(value)) def __getattr__(self,name): try: eq = self.cofficients[name]