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Get visible items in RecyclerView
...tManager, first/last depends on the adapter ordering. Don't query children from RecyclerView; LayoutManager may prefer to layout more items than visible for caching.
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MongoDB/Mongoose querying at a specific date?
....5+ years later, I strongly suggest using date-fns instead
import endOfDayfrom 'date-fns/endOfDay'
import startOfDay from 'date-fns/startOfDay'
MyModel.find({
createdAt: {
$gte: startOfDay(new Date()),
$lte: endOfDay(new Date())
}
})
For those of us using Moment.js
const moment = re...
How do you extract a column from a multi-dimensional array?
Does anybody know how to extract a column from a multi-dimensional array in Python?
20 Answers
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How to handle the modal closing event in Twitter Bootstrap?
...den.bs.modal: This event is fired when the modal has finished being hidden from the user (will wait for CSS transitions to complete).
And provide an example on how to use them:
$('#myModal').on('hidden.bs.modal', function () {
// do something…
})
Legacy Bootstrap 2.3.2 answer
Bootstrap's d...
How to use WeakReference in Java and Android development?
...ence to an object, but you don't want that reference to protect the object from the garbage collector. A classic example is a cache that you want to be garbage collected when memory usage gets too high (often implemented with WeakHashMap).
Be sure to check out SoftReference and PhantomReference as...
What character encoding should I use for a HTTP header?
... in field
content (obs-text) as opaque data.
Previously, RFC 2616 from 1999 defined this:
Words of *TEXT MAY contain characters from character sets other than ISO-
8859-1 [22] only when encoded according to the rules of RFC 2047 [14].
and RFC 2047 is the MIME encoding, so it'd ...
Writing Unicode text to a text file?
...nicode to variable-byte-length utf-8 conversion is automatically performed from memory to file.)
out1 = "(嘉南大圳 ㄐㄧㄚ ㄋㄢˊ ㄉㄚˋ ㄗㄨㄣˋ )"
fobj = open("t1.txt", "w", encoding="utf-8")
fobj.write(out1)
fobj.close()
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Bring a window to the front in WPF
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Do not use Window.Focus(). This will grab the focus away from what the user is currently typing in a text box, which is insanely frustrating for end users. The code above works just fine without it.
– Contango
Mar 18 '16 at 12:45
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Pass variables to Ruby script via command line
... variables and have only logical true/false values.
You can access values from environment variables:
> FIRST_NAME='Andy Warhol' ruby -e 'puts ENV["FIRST_NAME"]'
> Andy Warhol
Drawbacks are present here to, you have to set all the variables before the script invocation (only for your ruby ...
How to get the second column from command output?
...t the lines on "s:
awk -F '"' '{print $2}' your_input_file
or for input from pipe
<some_command> | awk -F '"' '{print $2}'
output:
A B
C
D
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