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difference between use and require

Can anyone explain the difference between use and require , both when used directly and as :use and :require in the ns macro? ...
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How do I profile memory usage in Python?

I've recently become interested in algorithms and have begun exploring them by writing a naive implementation and then optimizing it in various ways. ...
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adding x and y axis labels in ggplot2

How do I change the x and y labels on this graph please? 1 Answer 1 ...
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Difference between Iterator and Listiterator?

... And the reason why you can't do that with a Set is simple: There is not "current point": Elements have no index and there is no usefull way you can add an element "before" or "after" another one. – Joach...
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Difference between String#equals and String#contentEquals methods

What is the difference between the String#equals method and the String#contentEquals method? 9 Answers ...
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Why do function pointer definitions work with any number of ampersands '&' or asterisks '*'?

...foo)() = foo; works: foo is implicitly converted into a pointer to itself and that pointer is assigned to p1_foo. The unary &, when applied to a function, yields a pointer to the function, just like it yields the address of an object when it is applied to an object. For pointers to ordinary f...
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How do I position one image on top of another in HTML?

... tight in the corner). I am trying to avoid compositing (with ImageMagick and similar) due to performance issues. 10 Answe...
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How is set() implemented?

...ython source code for set which, according to Achim Domma, is mostly a cut-and-paste from the dict implementation. share | improve this answer | follow | ...
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How do you validate a URL with a regular expression in Python?

I'm building an app on Google App Engine. I'm incredibly new to Python and have been beating my head against the following problem for the past 3 days. ...
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omp parallel vs. omp parallel for

...r specifying a parallel construct containing one worksharing construct and no other statements. Permitted clauses are the union of the clauses allowed for the parallel and worksharing contructs. Taken from http://www.openmp.org/mp-documents/OpenMP3.0-SummarySpec.pdf The specs for OpenMP are...