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When should I use Arrow functions in ECMAScript 6?
...type definitions live in the global scope (think String.prototype.truncate etc.) and those generally have to be of type function anyway. Consistently using function on the global scope helps avoid errors.
Many functions in the global scope are object constructors for old-style class definitions.
Fun...
For-each over an array in JavaScript
...d properties with numeric names: NodeList instances, the arguments object, etc. How do we loop through their contents?
Use any of the options above for arrays
At least some, and possibly most or even all, of the array approaches above frequently apply equally well to array-like objects:
Use forE...
Append an object to a list in R in amortized constant time, O(1)?
... up to about a kB per node for my applications. I hold on to large arrays, etc.
– Ana Nimbus
Feb 1 at 6:23
...
Fastest way to iterate over all the chars in a String
...t are done for string sizes in multiples of two starting with 0,1,2,4,8,16 etc.
The tests are done 1,000 times per string size
The tests are shuffled into random order each time. In other words, the tests are done in random order every time they are done, over 1000 times over.
The entire test sui...
What's so bad about Template Haskell?
...or only function declarations, or only data-constructor-matching patterns, etc.
You can generate expressions that don't compile. You generated an expression that references a free variable foo that doesn't exist? Tough luck, you'll only see that when actually using your code generator, and only unde...
A monad is just a monoid in the category of endofunctors, what's the problem?
...y (which also comes with the Platform):
newtype Compose f g a = Compose { getCompose :: f (g a) }
-- | The composition of two 'Functor's is also a 'Functor'.
instance (Functor f, Functor g) => Functor (Compose f g) where
fmap f (Compose fga) = Compose (fmap (fmap f) fga)
So the natural tran...
Move assignment operator and `if (this != &rhs)`
...I would only see an issue if you were to start calling delete on pointers, etc. in your this object like you would in a normal lvaue-reference operator= method, but that sort of defeats the point of the rvalue-version ... i.e., it would seem redundant to use the rvalue version to basically do the sa...
The case against checked exceptions
...se of checked exceptions. The client code is going to be full of calls to fetch row data, every one of which is going to have to use a try/catch, and for what? Are they going to report to the user that the wrong row was sought? Probably not - because whatever the UI surrounding my table view is, it ...
What's the difference between passing by reference vs. passing by value?
...00.
Depending on the language's architecture or the type (class, struct, etc.) of your object, you would be either transferring "John" or 0x7fd5d258dd00
Passing "John" is known as passing by value.
Passing 0x7fd5d258dd00 is known as passing by reference. Anyone who is pointing to this memory loca...
Unicode equivalents for \w and \b in Java regular expressions?
...change the API from what it is in this alpha prototype, clean up the code, etc. But it helps us out tremendously, and we figure it will help others, too. I really wish Sun would do something about their library, but Oracle inspires no confidence.
– tchrist
Nov ...