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When should I use Lazy?
I found this article about Lazy : Laziness in C# 4.0 – Lazy
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For i = 0, why is (i += i++) equal to 0?
Take the following code (usable as a Console Application):
24 Answers
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Fast permutation -> number -> permutation mapping algorithms
I have n elements. For the sake of an example, let's say, 7 elements, 1234567. I know there are 7! = 5040 permutations possible of these 7 elements.
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CSS Background Opacity [duplicate]
I am using something similar to the following code:
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Difference between map, applymap and apply methods in Pandas
Can you tell me when to use these vectorization methods with basic examples?
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Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
I have an R data frame containing a factor that I want to "expand" so that for each factor level, there is an associated column in a new data frame, which contains a 1/0 indicator. E.g., suppose I have:
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Circle drawing with SVG's arc path
Short question: using SVG path, we can draw 99.99% of a circle and it shows up, but when it is 99.99999999% of a circle, then the circle won't show up. How can it be fixed?
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How to slice an array in Bash
Looking the "Array" section in the bash(1) man page, I didn't find a way to slice an array.
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Generate colors between red and green for a power meter?
I'm writing a Java game and I want to implement a power meter for how hard you are going to shoot something.
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part.
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