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How do I sort an array of hashes by a value in the hash?
...by has sort! for in-place sorting, but there's no in-place variant for sort_by in Ruby 1.8. In practice, you can do:
sorted = sort_me.sort_by { |k| k["value"] }
puts sorted
As of Ruby 1.9+, .sort_by! is available for in-place sorting:
sort_me.sort_by! { |k| k["value"]}
...
Center content of UIScrollView when smaller
...too.
Here's the Swift version if anyone needs it:
func scrollViewDidZoom(_ scrollView: UIScrollView) {
let offsetX = max((scrollView.bounds.width - scrollView.contentSize.width) * 0.5, 0)
let offsetY = max((scrollView.bounds.height - scrollView.contentSize.height) * 0.5, 0)
scrollView....
Android Fragments and animation
...etFragmentManager().beginTransaction();
ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right);
DetailsFragment newFragment = DetailsFragment.newInstance();
ft.replace(R.id.details_fragment_container, newFragment, "detailFragment");
// Start the animated transition.
ft.commit();
T...
What's the correct way to sort Python `import x` and `from x import y` statements?
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from nova.auth import users
from nova.endpoint import cloud
OR
import a_standard
import b_standard
import a_third_party
import b_third_party
from a_soc import f
from a_soc import g
from b_soc import d
Reddit official repository also states that, In general PEP-8 import ordering should be use...
How do you use vim's quickfix feature?
...ean much. It means that the shown line of code must be placed in ~/.vimrc (_VIMRC on windows AFAIK) and from the next start of VIM every time the file is saved this command will be invoked. Right?
– Беров
May 28 '18 at 21:06
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ManyRelatedManager object is not iterable
...
Try
matches = [val for val in Store.attribute_answers.all() if val in WishList.attribute_answers.all()]
Notice the parenthesis at the end of WishList.attribute_answers.all(). Adding the parenthesis invokes the all function to return an iterable.
If you include the p...
Regular expression \p{L} and \p{N}
...not be using alternation when a character class would suffice:
[\p{L}\p{N}_.-]*
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Sending a message to nil in Objective-C
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What it means is that the runtime doesn't produce an error when objc_msgSend is called on the nil pointer; instead it returns some (often useful) value. Messages that might have a side effect do nothing.
It's useful because most of the default values are more appropriate than an error. For e...
What are the benefits of functional programming? [closed]
... the same time is called parallelism. See en.wikipedia.org/wiki/Concurrency_(computer_science)
– Lambda Fairy
Dec 9 '11 at 1:28
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What is the Difference Between read() and recv() , and Between send() and write()?
... on a socket, and will produce an error if you try to use it on, say, STDIN_FILENO.
– Joey Adams
Jul 31 '11 at 5:29
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