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How can I output leading zeros in Ruby?

...counter is known (e.g., n = 3 for counters 1..876), you can do str = "file_" + i.to_s.rjust(n, "0") share | improve this answer | follow | ...
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CGContextDrawImage draws image upside down when passed UIImage.CGImage

...answered Feb 6 '09 at 20:46 Kendall Helmstetter GelnerKendall Helmstetter Gelner 72.5k2626 gold badges123123 silver badges146146 bronze badges ...
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Reading binary file and looping over each byte

...hile byte != "": # Do stuff with byte. byte = f.read(1) finally: f.close() Python 2.5-2.7 with open("myfile", "rb") as f: byte = f.read(1) while byte != "": # Do stuff with byte. byte = f.read(1) Note that the with statement is not available in versio...
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Python: fastest way to create a list of n lists

... The probably only way which is marginally faster than d = [[] for x in xrange(n)] is from itertools import repeat d = [[] for i in repeat(None, n)] It does not have to create a new int object in every iteration and is about 15 % faster on my machine. Edi...
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How do I ignore files in a directory in Git?

... This is actually a copy-paste from the git documentation – mcont Aug 17 '18 at 10:00 1 ...
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Find intersection of two nested lists?

... 3 filter returns an iterable instead of list, so you need to wrap filter calls with list(): c3 = [list(filter(lambda x: x in c1, sublist)) for sublist in c2] Explanation: The filter part takes each sublist's item and checks to see if it is in the source list c1. The list comprehension is exec...
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Windows 7, 64 bit, DLL problems

...++ 32-bit executable on my Windows 7 64-bit development box that also has all those Microsoft applications (Visual Studio 2008 + 2010, TFS, SDK, Microsoft Office)... And it's still running just fine. ...
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How to use Global Variables in C#?

...er the behavior of static variables declared inside, but it doesn't look really useful. – Tommaso Belluzzo Feb 2 at 18:01 ...
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Is inject the same thing as reduce in ruby?

... If you want to create your own aliases, you may be interested in alias_method. – Nick McCurdy Oct 25 '13 at 2:16 ...
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How to solve Operator '!=' cannot be applied to operands of type 'T' and 'T' [duplicate]

... public class Test<T> { public T Value { get => _Value; set { // operator== is undefined for generic T; EqualityComparer solves this if (!EqualityComparer<T>.Default.Equals(_Value, value)) { _Valu...