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c# barcode generator library ABSTRACTION in Font
CHAPTER 6 ABSTRACTION Encode PDF-417 2d Barcode In None Using Barcode generation for Font Control to generate, create PDF 417 image in Font applications. www.OnBarcode.comGenerating ECC200 In None Using Barcode creator for Font Control to generate, create Data Matrix image in Font applications. www.OnBarcode.com>>> search(seq, 100) 5 But why go to all this trouble For one thing, you could simply use the list method index, and if you wanted to implement this yourself, you could just make a loop starting at the beginning and iterating along until you found the number. Sure, using index is just fine. But using a simple loop may be a bit inefficient. Remember I said you needed seven questions to find one number (or position) among 100 And the loop obviously needs 100 questions in the worst-case scenario. Big deal, you say. But if the list has 100,000,000,000,000,000,000,000,000,000,000,000 elements, and the same number of questions with a loop (perhaps a somewhat unrealistic size for a Python list), this sort of thing starts to matter. Binary search would then need only 117 questions. Pretty efficient, huh 34 Print Code 3/9 In None Using Barcode maker for Font Control to generate, create Code 39 image in Font applications. www.OnBarcode.comMaking Barcode In None Using Barcode encoder for Font Control to generate, create Barcode image in Font applications. www.OnBarcode.com Tip You can actually find a standard implementation of binary search in the bisect module.
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Make UCC-128 In None Using Barcode maker for Font Control to generate, create EAN 128 image in Font applications. www.OnBarcode.comEAN8 Creator In None Using Barcode generator for Font Control to generate, create EAN / UCC - 8 image in Font applications. www.OnBarcode.comBy now, you are probably used to using functions just like other objects (strings, number, sequences, and so on) by assigning them to variables, passing them as parameters, and returning them from other functions. Some programming languages (such as Scheme or Lisp) use functions in this way to accomplish almost everything. Even though you usually don t rely that heavily on functions in Python (you usually make your own kinds of objects more about that in the next chapter), you can. Python has a few functions that are useful for this sort of functional programming : map, filter, and reduce.4 (In Python 3.0, these are moved to the functools module.) The map and filter functions are not really all that useful in current versions of Python, and you should probably use list comprehensions instead. You can use map to pass all the elements of a sequence through a given function: >>> map(str, range(10)) # Equivalent to [str(i) for i in range(10)] ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'] You use filter to filter out items based on a Boolean function: >>> def func(x): ... return x.isalnum() ... >>> seq = ["foo", "x41", " !", "***"] >>> filter(func, seq) ['foo', 'x41'] PDF417 Creation In None Using Barcode generation for Online Control to generate, create PDF-417 2d barcode image in Online applications. www.OnBarcode.comPainting PDF 417 In None Using Barcode creation for Word Control to generate, create PDF 417 image in Office Word applications. www.OnBarcode.com3. In fact, with the estimated number of particles in the observable universe at 1087, you would need only about 290 questions to discern between them! 4. There is also apply, but that was really only needed before we had the splicing discussed previously. Create GTIN - 128 In Java Using Barcode generator for Eclipse BIRT Control to generate, create EAN / UCC - 14 image in Eclipse BIRT applications. www.OnBarcode.comECC200 Creation In VS .NET Using Barcode creation for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in VS .NET applications. www.OnBarcode.comCHAPTER 6 ABSTRACTION
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