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Unique (non-repeating) random numbers in O(1)?
I'd like to generate unique random numbers between 0 and 1000 that never repeat (i.e. 6 doesn't show up twice), but that doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
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find -exec cmd {} + vs | xargs
Which one is more efficient over a very large set of files and should be used?
3 Answers
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Determine version of Entity Framework I am using?
I believe there are two versions 1 and 2? And version 2 is referred to as Entity Framework 4.0?
10 Answers
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Exit a Script On Error
I'm building a Shell Script that has a if function like this one:
5 Answers
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Does const mean thread-safe in C++11?
I hear that const means thread-safe in C++11 . Is that true?
1 Answer
1
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Format number to 2 decimal places
I would like to know how can I output a number with 2 decimal places, without rounding the original number.
6 Answers
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Predicate in Java
I am going through the code which uses Predicate in Java. I have never used Predicate . Can someone guide me to any tutorial or conceptual explanation of Predicate and its implementation in Java?
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What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Citing the author of a blockquote using Markdown syntax
I am using the Symfony CMS and it uses Markdown for article writing. I need to do a blockquote of a quote from Benjamin Franklin and would like to have the quote followed by a citation beneath it, but right now all it does is blockquote the whole line. How does one do this in markdown syntax?
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Left padding a String with Zeros [duplicate]
I've seen similar questions here and here .
20 Answers
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