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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...floating-point numbers are not real numbers, and floating-point arithmetic does not satisfy the axioms of real arithmetic. Trichotomy is not the only property of real arithmetic that does not hold for floats, nor even the most important. For example:
Addition is not associative.
The distributive...
What does the exclamation mark do before the function?
...turns it into an expression. It is now a function expression.
The ! alone doesn't invoke the function, of course, but we can now put () at the end: !function foo() {}() which has higher precedence than ! and instantly calls the function.
So what the author is doing is saving a byte per function ex...
throw Error('msg') vs throw new Error('msg')
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Error does act like a factory, like some other native constructors: Array, Object, etc. all check something like if (!(this instanceof Array)) { return new Array(arguments); }. (But note that String(x) and new String(x) are very di...
How does type Dynamic work and how to use it?
...ca of "method missing" in dynamic languages.
It is correct, scala.Dynamic doesn't have any members, it is just a marker interface - the concrete implementation is filled-in by the compiler. As for Scalas String Interpolation feature there are well defined rules describing the generated implementati...
SQL Server Text type vs. varchar data type [closed]
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While this is not "official" it does cover the basics. Text is in fact depreciated & also does not support everything that varchar(max) does, like ability to search & index. blog.sqlauthority.com/2007/05/26/…
– achinda99
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How to link to a named anchor in Multimarkdown?
... to it so:
and we can even [link](#head1234) to it so:
(On SO, the link doesn't work because the anchor is stripped.)
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What's the difference between == and .equals in Scala?
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Does it also apply when using Java libraries?
– Jus12
Oct 6 '11 at 22:50
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Xcode source automatic formatting
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Unfortunately, Xcode doesn't have anything nearly as extensive as VS or Jalopy for Eclipse available. There are SOME disparate features, such as Structure > Re-Indent as well as the auto-formatting used when you paste code into your source fil...
What does “abstract over” mean?
... something else", by allowing implicit conversions as parameters. Haskell does similarly with type classes.
Scala doesn't (yet) allow you to abstract over classes. You can't pass a class to something, and then use that class to create new objects. Other languages do allow abstraction over class...
Setting element of array from Twig
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This is so silly. Why doesn't twig allow the ability to set array values?
– Matt Cavanagh
Aug 2 '16 at 8:48
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