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How to check if an object is a generator object in python?
...nspect
>>> inspect.isgeneratorfunction(generator_function)
True
calling generator_function won't yield normal result, it even won't execute any code in the function itself, the result will be special object called generator:
>>> generator = generator_function()
>>> gene...
Making the iPhone vibrate
...ID(kSystemSoundID_Vibrate))
The cheesy thing is that SystemSoundID is basically a typealias (fancy swift typedef) for a UInt32, and the kSystemSoundID_Vibrate is a regular Int. The compiler gives you an error for trying to cast from Int to UInt32, but the error reads as "Cannot convert to SystemSou...
What does “coalgebra” mean in the context of programming?
...lass Functor f ⇒ Algebra f τ where
op ∷ f τ → τ
This is often called an "F-algebra" because it's determined by the functor F. If we could partially apply typeclasses, we could define something like class Monoid = Algebra MonoidArgument.
Coalgebras
Now, hopefully you have a good grasp...
How to align input forms in HTML
...fied that input elements contained within are to be 100% of the container width and not have any elements on either side.
.container {
width: 500px;
clear: both;
}
.container input {
width: 100%;
clear: both;
}
<html>
<head>
<title>Example form</titl...
How to get the pure text without HTML element using JavaScript?
...ky approach:
function get_content() {
var html = document.getElementById("txt").innerHTML;
document.getElementById("txt").innerHTML = html.replace(/<[^>]*>/g, "");
}
// Gabi's elegant approach, but eliminating one unnecessary line of code:
function gabi_content() {
var element...
Why can't we have static method in a (non-static) inner class?
...it static, but some of its methods are just utility functions. Why can't I call A.B.sync(X) or even (from within A) B.sync(x)?
– Edward Falk
Nov 11 '15 at 19:00
...
Make a Bash alias that takes a parameter?
...create a function.
alias does not accept parameters but a function can be called just like an alias. For example:
myfunction() {
#do things with parameters like $1 such as
mv "$1" "$1.bak"
cp "$2" "$1"
}
myfunction old.conf new.conf #calls `myfunction`
By the way, Bash functions de...
Is there a way to make R beep/play a sound at the end of a script?
...thought I'd ask here since this page has a lot of visibility: can beepr be called from options, i.e. options(error=beepr(sound=9)) ? Calling it after a successful run is useful U& i'll use it, but also it'd be great to call it if the code crashes... Cheers!
– dez93_2000
...
Get all keys of an NSDictionary as an NSArray
...s and values, here's what you do:
for (NSString *key in dictionary) {
id value = dictionary[key];
NSLog(@"Value: %@ for key: %@", value, key);
}
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Copy folder recursively in node.js
...
I got some simple cases where ncp does not go in my callback where fs-extra correctly does.
– bumpmann
Nov 3 '16 at 22:14
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