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How to check whether a Storage item is set?
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Note removed. Thanks @TimothyZorn and Alnitak
– Christian C. Salvadó
Mar 7 '17 at 22:30
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show 2 m...
Type List vs type ArrayList in Java [duplicate]
I understand that with (1), implementations of the List interface can be swapped. It seems that (1) is typically used in an application regardless of need (myself I always use this).
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How do I extract a sub-hash from a hash?
...:d=>:D}
h1 = Hash[h1.to_a - h2.to_a] # => {:a=>:A, :c=>:C}
And if you want to patch that into the Hash class:
class Hash
def extract_subhash(*extract)
h2 = self.select{|key, value| extract.include?(key) }
self.delete_if {|key, value| extract.include?(key) }
h2
end
en...
socket.emit() vs. socket.send()
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I don't know, I checked the source code and they make almost the same (github.com/LearnBoost/socket.io/blob/master/lib/socket.js#L318). Maybe it's historical and just for backwards compatibility.
– Charles
Jul 20 '12 at 6:53
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How to convert a dictionary to query string in Python?
...'foo', 'param2': 'bar'})
output: 'pram1=foo&param2=bar'
for python2 and python3 compatibility, try this:
try:
#python2
from urllib import urlencode
except ImportError:
#python3
from urllib.parse import urlencode
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Why does “split” on an empty string return a non-empty array?
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For the same reason that
",test" split ','
and
",test," split ','
will return an array of size 2. Everything before the first match is returned as the first element.
share
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How to get just one file from another branch
I am using git and working on master branch. This branch has a file called app.js .
10 Answers
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Missing file warnings showing up after upgrade to Xcode 4
...ing some warnings that I did not get before. I have looked through forums and other SO posts but have not come across how to fix this.
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ng-repeat finish event
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Indeed, you should use directives, and there is no event tied to the end of a ng-Repeat loop (as each element is constructed individually, and has it's own event). But a) using directives might be all you need and b) there are a few ng-Repeat specific properti...
How to collapse all methods in Xcode?
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As of Xcode 4 it seems to have changed.
command-alt-shift-left arrow will do the trick...
To fold/unfold current methods or if structures use:
Fold: command-alt-left arrow
Unfold: command-alt-right arrow
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