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LEFT OUTER joins in Rails 3
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what if you only wanted the Posts which had no user?
– mcr
Aug 18 '11 at 4:30
24
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Add table row in jQuery
What is the best method in jQuery to add an additional row to a table as the last row?
39 Answers
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Is there a perfect algorithm for chess? [closed]
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What makes the weather difficult to forecast are the chaotic non-linear factors, not any quantum effects. Given enough computing power and knowledge, We could in theory create a "correct" weather forecast.
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C#: why sign an assembly?
...es to be signed with the same key.
Is signing assemblies necessary and what would be wrong with not signing it?
No, it is not necessary but it is a mechanism allowing you to ensure the authenticity of an assembly. It allows you to ensure that an assembly hasn't been tampered with and indeed it...
Remove ':hover' CSS behavior from element
...to those you want to hover - alongside the test class. This isn't directly what you asked but without more context it feels like the best solution and is possibly the cleanest and simplest way of doing it.
Example:
.test { border: 0px; }
.testhover:hover { border: 1px solid red; }
<div ...
Why is enum class preferred over plain enum?
...e }; // enum class
enum Animal { dog, cat, bird, human }; // plain enum
What is the difference between the two?
enum classes - enumerator names are local to the enum and their values do not implicitly convert to other types (like another enum or int)
Plain enums - where enumerator names are in ...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...id constructive proof, then a term of that type is a means of constructing whatever you've proven the existence of.
A major feature of the constructivist flavor is that double negation is not equivalent to non-negation. In fact, negation is rarely a primitive in a type system, so instead we can rep...
How to tell whether a point is to the right or left side of a line
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For what it's worth, this can be slightly simplified to return (b.x - a.x)*(c.y - a.y) > (b.y - a.y)*(c.x - a.x);, but the compiler probably optimizes that anyway.
– Nicu Stiurca
Oct 7 '1...
C++ Build Systems - What to use? [closed]
...on" could take on "a-life-of-its-own" beyond the build system depending on what you want to do. (See below.)
For simple projects, the QMake generator is ok (you don't need to use the Qt libraries to use QMake). But, you're not describing "simple" -- code generation and "extra-phases" means you pro...
Finding the number of days between two dates
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What about leap seconds? Not all days have exactly 24*60*60 seconds. This code might be sufficient for practical purposes but it's not exact in sone extremely rare edge cases.
– Benjamin Brizzi
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