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How to “crop” a rectangular image into a square with CSS?

I know that it is impossible to actually modify an image with CSS, which is why I put crop in quotes. 10 Answers ...
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Verifying that a string contains only letters in C#

I have an input string and I want to verify that it contains: 10 Answers 10 ...
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Why should eval be avoided in Bash, and what should I use instead?

Time and time again, I see Bash answers on Stack Overflow using eval and the answers get bashed, pun intended, for the use of such an "evil" construct. Why is eval so evil? ...
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How is Racket different from Scheme?

Racket is a descendant of Scheme. How is Racket different than R6RS? What did it add, or take away, or is just different? 6...
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Which kind of pointer do I use when?

Ok, so the last time I wrote C++ for a living, std::auto_ptr was all the std lib had available, and boost::shared_ptr was all the rage. I never really looked into the other smart pointer types boost provided. I understand that C++11 now provides some of the types boost came up with, but not all ...
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Creating an index on a table variable

Can you create an index on a table variable in SQL Server 2000? 3 Answers 3 ...
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Minimizing NExpectation for a custom distribution in Mathematica

This relates to an earlier question from back in June: 1 Answer 1 ...
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Creating an R dataframe row-by-row

I would like to construct a dataframe row-by-row in R. I've done some searching, and all I came up with is the suggestion to create an empty list, keep a list index scalar, then each time add to the list a single-row dataframe and advance the list index by one. Finally, do.call(rbind,) on the list...
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Javascript when to use prototypes

I'd like to understand when it is appropriate to use prototype methods in js. Should they always be used? Or are there cases where using them is not preferred and/or incurs a performance penalty? ...
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Is there a way to run Python on Android?

We are working on an S60 version and this platform has a nice Python API.. 23 Answers ...