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How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
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Is it possible to declare two variables of different types in a for loop?
Is it possible to declare two variables of different types in the initialization body of a for loop in C++?
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Check if a string contains a string in C++
I have a variable of type std::string . I want to check if it contains a certain std::string . How would I do that?
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How to suppress scientific notation when printing float values?
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Regex group capture in R with multiple capture-groups
In R, is it possible to extract group capture from a regular expression match? As far as I can tell, none of grep , grepl , regexpr , gregexpr , sub , or gsub return the group captures.
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Small Haskell program compiled with GHC into huge binary
Even trivially small Haskell programs turn into gigantic executables.
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Empty arrays seem to equal true and false at the same time
Empty arrays are true but they're also equal to false.
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Swapping column values in MySQL
I have a MySQL table with coordinates, the column names are X and Y. Now I want to swap the column values in this table, so that X becomes Y and Y becomes X. The most apparent solution would be renaming the columns, but I don't want to make structure changes since I don't necessarily have permission...
What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
I have some code and when it executes, it throws a IndexOutOfRangeException , saying,
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Sorting list based on values from another list?
I have a list of strings like this:
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