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Is there a MySQL option/feature to track history of changes to records?
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Gradient of n colors ranging from color 1 and color 2
...u can give the resulting vector of colours to colorRampPalette to generate more colours along that ramp. For example: colorRampPalette(brewer.pal(8, "Spectral")).
– jbaums
Apr 30 '14 at 23:15
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In Ruby, how do I skip a loop in a .each loop, similar to 'continue' [duplicate]
...times, upto, downto, each_with_index, select, map and other iterators (and more generally blocks).
For more info see http://ruby-doc.org/docs/ProgrammingRuby/html/tut_expressions.html#UL.
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OS detecting makefile
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There are many good answers here already, but I wanted to share a more complete example that both:
doesn't assume uname exists on Windows
also detects the processor
The CCFLAGS defined here aren't necessarily recommended or ideal; they're just what the project to which I was adding OS/...
How to avoid using Select in Excel VBA
...but am unsure of how to avoid using it. I am finding that my code would be more re-usable if I were able to use variables instead of Select functions. However, I am not sure how to refer to things (like the ActiveCell etc.) if not using Select .
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How do you do a limit query in JPQL or HQL?
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I would argue that Hibernate 3's approach is more correct. Your usage of Hibernate is meant to be database-agnostic, so you should have to do these sorts of things in an abstract manner.
– matt b
Aug 6 '09 at 16:35
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What is the difference between self-types and trait subclasses?
...ts are satisfied. A User and an implementation of User are provided.
For more practical use cases, please see the links at the start of this answer! But, hopefully now you get it.
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Finding all cycles in a directed graph
..., a cycle is elementary if no vertex (apart from the start/finish) appears more than once. By that definition, isn't A->B->C->A elementary too?
– psmears
Dec 1 '14 at 10:27
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What is the difference between the template method and the strategy patterns?
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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...oint arithmetic.
Addendum:
Many commenters have argued that it would be more useful to preserve reflexivity of equality and trichotomy on the grounds that adopting NaN != NaN doesn’t seem to preserve any familiar axiom. I confess to having some sympathy for this viewpoint, so I thought I would...