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How do I append one string to another in Python?
...ference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
used to be O(n^2), but now it is O(n).
From the source...
C# if/then directives for debug vs release
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Thank you! I don't yet even know what "#defines" are so this is a great solution!
– Tim
Feb 8 '12 at 10:29
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How do I find duplicates across multiple columns?
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With that, you can't know the id of each line.
– Juan.Queiroz
12 hours ago
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What is the relationship between Looper, Handler and MessageQueue in Android?
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It's widely known that it's illegal to update UI components directly from threads other than main thread in android. This android document (Handling Expensive Operations in the UI Thread) suggests the steps to follow if we need to start a...
Node.js app can't run on port 80 even though there's no other process blocking the port
... Not sure why, but on Ubuntu 14.04 this did not work for me. I now use port forwarding via ssh, which is just as easy. I posted an answer below.
– panepeter
Feb 27 '18 at 9:12
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UILabel - auto-size label to fit text?
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@Zeezer do you know why?
– FurloSK
Jul 15 '15 at 10:10
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How can I get the diff between all the commits that occurred between two dates with Git?
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@brbob I know this was answered a long time ago, but just for someone who stumbles upon this (as I did) Git help says: The command is kept primarily for historical reasons; fingers of many people who learned Git long before git log was...
What do I have to do to get Core Data to automatically migrate models?
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I've now found out that this is quite simple - once you know where to look.
In my AppDelegate I set-up the NSPersistentStoreCoordinator - and you need to add some options to this to tell it to handle auto-migrate:
NSDictionary *...
How to drop all tables in a SQL Server database?
...K
Then, either save to file, clipboard, or new query window.
Run script.
Now, this will drop everything, including the database. Make sure to remove the code for the items you don't want dropped. Alternatively, in the "Choose Objects" section, instead of selecting to script entire database just se...
Are there any CSV readers/writer libraries in C#? [closed]
...rategies on that spot? I've deleted my original remark by the way, as it's now irrelevant :-)
– Zimano
Oct 5 '19 at 10:42
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