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How to get client's IP address using JavaScript?
...rns:
fl=4f422
h=www.cloudflare.com
ip=54.193.27.106
ts=1575967108.245
visit_scheme=https
uag=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36 Hypothesis-Via
colo=SJC
http=http/1.1
loc=US
tls=TLSv1.3
sni=plaintext
warp=off
Limitation...
What is an optional value in Swift?
...t; = Optional("Bob")
This calls Optional's first initializer, public init(_ some: Wrapped), which infers the optional's associated type from the type used within the parentheses.
The even longer way of creating and setting an optional:
var serialNumber:String? = Optional.none
serialNumber = Optiona...
What are the main disadvantages of Java Server Faces 2.0?
...F Reference Implementation 1.2 (which was codenamed Mojarra since build 1.2_08, around 2008), practically every build got shipped with (major) performance improvements next to the usual (minor) bugfixes.
The only serious disadvantage of JSF 1.x (including 1.2) is the lack of a scope in between the ...
dynamically add and remove view to viewpager
...ed, from left-to-right. If the page no longer exists,
// return POSITION_NONE.
@Override
public int getItemPosition (Object object)
{
int index = views.indexOf (object);
if (index == -1)
return POSITION_NONE;
else
return index;
}
//------------------------------...
How are msys, msys2, and msysgit related to each other?
...What are the differences between msys/git and git-for-windows/mingw-w64-x86_64-git?
– Brecht Machiels
Oct 26 '16 at 12:34
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What is the best Distributed Brute Force countermeasure?
...rers, since they can be easily faked. What you need is to set a key in the _SESSION var when the user views the login page, and then check to make sure that key exists when they submit their login information. If bot does not submit from the login page, it will not be able to login. You can also fac...
How would you implement an LRU cache in Java?
...mple = Collections.synchronizedMap(new LruCache<String, String>(CACHE_SIZE));
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Benefits of prototypal inheritance over classical?
... you to copy the properties of an arbitrary number of objects. For example _.extend does just this.
Of course many programmers don't consider this to be true inheritance because instanceof and isPrototypeOf say otherwise. However this can be easily remedied by storing an array of prototypes on ever...
Running Bash commands in Python
...ch are commonly overlooked.
Prefer subprocess.run() over subprocess.check_call() and friends over subprocess.call() over subprocess.Popen() over os.system() over os.popen()
Understand and probably use text=True, aka universal_newlines=True.
Understand the meaning of shell=True or shell=False and h...
What is the purpose of the reader monad?
... to get a monad:
instance Monad (Reader env) where
return x = Reader (\_ -> x)
(Reader f) >>= g = Reader $ \x -> runReader (g (f x)) x
which is not so scary. ask is really simple:
ask = Reader $ \x -> x
while local isn't so bad:
local f (Reader g) = Reader $ \x -> runR...