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Why are side-effects modeled as monads in Haskell?
...ally represent the real world, it's just a token to keep the operations in order (the "magic" is that RealWorld is GHC Haskell's only uniqueness type)
– Jeremy List
Oct 30 '15 at 7:15
...
Why does Ruby have both private and protected methods?
...
# Comparable module will use this comparison method for >, <, ==, etc.
def <=>(other_dwarf)
# One dwarf is allowed to call this method on another
beard_strength <=> other_dwarf.beard_strength
end
def greet
"Lo, I am #{name}, and have mined these #{age} years.\...
Checking the equality of two slices
...
It does not compare randomly orderded slices with same items :(
– Hemant_Negi
Jun 7 '17 at 7:01
5
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What is a None value?
...es have similar concepts. SQL has NULL; JavaScript has undefined and null, etc.
Note that in Python, variables exist by virtue of being used. You don't need to declare a variable first, so there are no really empty variables in Python. Setting a variable to None is then not the same thing as settin...
How to revert a Git Submodule pointer to the commit stored in the containing repository?
...t points wrt to submodules you can:
git ls-tree <some sha1, or branch, etc> Submodule/path
you can then see the commit or anything else if you like by passing that into log, etc (the git-dir option at the git command level allows you to skip having to cd down to the submodule):
git --git-d...
How serious is this new ASP.NET security vulnerability and how can I workaround it?
...e information about the way that the site's decryption process works.
In order for the attack to work the following must be true:
Your application must give an error message about the padding being invalid.
Someone must tamper with your encrypted cookies or viewstate
So, if you return human re...
How do I find the duplicates in a list and create another list with them?
...perform better. This code computes a list of unique elements in the source order:
seen = set()
uniq = []
for x in a:
if x not in seen:
uniq.append(x)
seen.add(x)
or, more concisely:
seen = set()
uniq = [x for x in a if x not in seen and not seen.add(x)]
I don't recommen...
How to sign an android apk file
...wizard:
Make a new key-store. remember that password
Sign your app
Save it etc.
Also, from the link:
Compile and sign with Eclipse ADT
If you are using Eclipse with the ADT
plugin, you can use the Export Wizard
to export a signed .apk (and even
create a new keystore, if necessary).
...
Why can I access private variables in the copy constructor?
...paring, adding/multiplying/dividing, copy-constructing, cloning, assigning etc. then it's often the case that you either simply must have access to private and/or protected data in the other object, or want it to allow a simpler, faster or generally better function implementation.
Specifically, the...
Combine multiple Collections into a single logical Collection?
...ods in the Collection interface would either have undefined semantics (add etc) or miserable performance (contains etc).
– Sean Patrick Floyd
Aug 2 '11 at 13:00
2
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