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if/else in a list comprehension
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The specific problem has already been solved in previous answers, so I will address the general idea of using conditionals inside list comprehensions.
Here is an example that shows how conditionals can be written inside a list comprehension:
X = [1.5...
html select option separator
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This is an old thread, but since no one posted a similar response, I'll add this as it's my preferred way of separation.
I find using dashes and such to be somewhat of an eyesore since it could fall short of the width of the selection box. ...
C# Java HashMap equivalent
... : codaddict's algorithm : O(n)
checkPairs(a, 10);
Console.Read();
}
}
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How to remove trailing whitespace of all files recursively?
...ic solution which checks that the MIME type starts with text/:
while IFS= read -r -d '' -u 9
do
if [[ "$(file -bs --mime-type -- "$REPLY")" = text/* ]]
then
sed -i 's/[ \t]\+\(\r\?\)$/\1/' -- "$REPLY"
else
echo "Skipping $REPLY" >&2
fi
done 9< <(find . -...
How to programmatically close a JFrame
...ut that. Please delete all your comments so you don't confuse other people reading this answer, since the answer was given to directly answer the OP's question, not your interpretation of the heading of the question.
– camickr
Jul 26 '17 at 16:33
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Should Javadoc comments be added to the implementation?
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Don't you already know that elements need to be compareable when using a TreeMap? An implementation also shouldn't implement conflicting behaviour.
– Jimmy T.
May 16 '16 at 11:26
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How to configure logging to syslog in Python?
.... My needs are very simple: I just want to log everything to syslog. After reading documentation I came up with this simple test script:
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Why cast unused return values to void?
... It is "costless" if the time to write it and the subsequent time reading, understanding (and then ignoring) the code is free. IMO, writing (void) costs me time and energy and makes me wonder if the author knew how expressions work.
– wallyk
Jul 3 '12...
Identify if a string is a number
...the state machine takes O(2^n) where n is the length of the regex, whereas reading is O(k) where k is the length of the string being searched. So rebuilding the regex every time introduces a bias.
– Clément
Jan 5 '11 at 17:29
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How to set timeout on python's socket recv method?
...n more than one socket at a time.
import select
mysocket.setblocking(0)
ready = select.select([mysocket], [], [], timeout_in_seconds)
if ready[0]:
data = mysocket.recv(4096)
If you have a lot of open file descriptors, poll() is a more efficient alternative to select().
Another option is to...