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What does the `forall` keyword in Haskell/GHC do?
...gt; Maybe a -> b, except for when ScopedTypeVariables is enabled.
This means that it works for every a and b.
Let's say you want to do something like this.
ghci> let putInList x = [x]
ghci> liftTup putInList (5, "Blah")
([5], ["Blah"])
What must be the type of this liftTup? It's liftTu...
Android TextView with Clickable Links: how to capture clicks?
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Wonderful, but if you apply it to a ListView (i mean, to each element's inner TextView), makes the list unclickable, though links are still clickable
– voghDev
May 27 '14 at 15:45
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What exactly is RESTful programming?
... implemented a few years ago when I first wrote this, rather than its true meaning. I've revised the answer to better represent the real meaning.)
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Difference between Role and GrantedAuthority in Spring Security
... etc.) always adds the ROLE_ prefix for you. So hasAuthority('ROLE_ADMIN') means the the same as hasRole('ADMIN') because the ROLE_ prefix gets added automatically. See the spring security 3 to 4 migration guide for futher information.
But still: a role is just an authority with a special ROLE_ pre...
spring scoped proxy bean
...one, the 'userPreferences' bean) will also only be injected (once!).
This means that the 'userManager' will (conceptually) only ever operate on the exact same 'userPreferences' object, that is the one that it was originally injected with.
This is not what you want when you inject a HTTP Session-sc...
Finding the type of an object in C++
...nformation
RTTI is available only for classes that are polymorphic, which means
they have at least one virtual method. In practice, this is not a
limitation because base classes must have a virtual destructor to
allow objects of derived classes to perform proper cleanup if they are
deleted from a b...
Storing time-series data, relational or non?
...l PK is (Device, Metric, DateTime). (Please don't call it TimeStamp, that means something else, but that is a minor issue.) The uniqueness of the row is identified by:
(Device, Metric, DateTime)
The Id column does nothing, it is totally and completely redundant.
An Id column is never a ...
Read an Excel file directly from a R script
...NN, TRUE),
#lognormally distributed numeric
num1 = round(exp(rnorm(NN, mean = 6.5, sd = 1.5)), 2L),
#3 binary strings
str6 = sample(c("Y","N"), NN, TRUE),
str7 = sample(c("M","F"), NN, TRUE),
str8 = sample(c("B","W"), NN, TRUE),
#right-skewed integer
int1 = ceiling(rexp(NN)),
#date...
Custom attributes - Yea or nay?
...You won't be able to remove comments without breaking your code. This also means you can't add real comments anymore.
– Olivictor
May 12 '17 at 14:25
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Migration: Cannot add foreign key constraint
...s well, thanks. But it seems a bit strange to me that it works this way. I mean, it makes sense, but there should be a way to specify the order of the migration execution other than manually renaming the files and coming up with fake dates in the process
– allisius
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