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Paste multiple columns together
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Brian DiggsBrian Diggs
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Removing a list of characters in string
...>> re.sub(rx, '', subj)
'ABC'
(re.escape ensures that characters like ^ or ] won't break the regular expression).
C. Use the mapping variant of translate:
>>> chars_to_remove = [u'δ', u'Γ', u'ж']
>>> subj = u'AжBδCΓ'
>>> dd = {ord(c):None for c in chars_to_...
What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...a query optimizer would have to catch the fact that your GROUP BY is not taking advantage of any group members, just their keys. DISTINCT makes this explicit, so you can get away with a slightly dumber optimizer.
When in doubt, test!
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Should I use s and s inside my s?
...he nav element communicates that we're dealing with a major navigation block
The list communicates that the links inside this navigation block form a list of items
At http://w3c.github.io/html/sections.html#the-nav-element you can see that a nav element could also contain prose.
So yes, having a...
RESTful URL design for search
I'm looking for a reasonable way to represent searches as a RESTful URLs.
12 Answers
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Redis: Show database size/size for keys
My redis instance seems to being growing very large and I'd like to find out which of the multiple databases I have in there consumes how much memory. Redis' INFO command just shows me the total size and the number of keys per database which doesn't give me much insight... So any tools/ideas that ...
Sending a notification from a service in Android
I have a service running, and would like to send a notification. Too bad, the notification object requires a Context , like an Activity , and not a Service .
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Linux command to list all available commands and aliases
... could run.
compgen -b will list all the built-ins you could run.
compgen -k will list all the keywords you could run.
compgen -A function will list all the functions you could run.
compgen -A function -abck will list all the above in one go.
Check the man page for other completions you can genera...
How to vertically align an image inside a div
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The only (and the best cross-browser) way as I know is to use an inline-block helper with height: 100% and vertical-align: middle on both elements.
So there is a solution: http://jsfiddle.net/kizu/4RPFa/4570/
.frame {
height: 25px; /* Equals maximum image ...
Is it possible to program iPhone in C++
...ctive-C++, which you can read about at Apple Developer Connection.
If you know C++ already, learning Objective-C would be pretty simple, if you decided to give that a try. More info on that topic is at the ADC as well.
shar...