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What would cause an algorithm to have O(log n) complexity?

...er dividing n in half i times we'll have a value that is at most 1. The smallest i for which this is guaranteed is roughly log2 n, so if we have an algorithm that divides by 2 until the number gets sufficiently small, then we can say that it terminates in O(log n) steps. An important detail is tha...
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How does this giant regex work?

I recently found the code below in one of my directories, in a file called doc.php . The file functions or links to a file manager. It's quite nicely done. Basically, it lists all the files in the current directory, and it lets you change directories. ...
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Python list subtraction operation

... [1,2] you will get empty list. [1,1,2,2] - [2] gives [1,1] So it is not really list substraction, it is more like "List from List X without elements from set Y". – Alfred Zien Feb 6 '16 at 10:25 ...
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jasmine: Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL

I have an angular service called requestNotificationChannel : 17 Answers 17 ...
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Retain cycle on `self` with blocks

...nswered Dec 4 '10 at 8:14 Lily BallardLily Ballard 164k2525 gold badges355355 silver badges331331 bronze badges ...
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How to send an email with Gmail as provider using Python?

...smtp.gmail.com:587') server.ehlo() server.starttls() Also you should really create From:, To: and Subject: message headers, separated from the message body by a blank line and use CRLF as EOL markers. E.g. msg = "\r\n".join([ "From: user_me@gmail.com", "To: user_you@gmail.com", "Subject:...
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Using Enum values as String literals

... You can't. I think you have FOUR options here. All four offer a solution but with a slightly different approach... Option One: use the built-in name() on an enum. This is perfectly fine if you don't need any special naming format. String name = Modes.mode1.name(); /...
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Best practice multi language website

...ome months now, but I haven't been in a situation that I needed to explore all possible options before. Right now, I feel like it's time to get to know the possibilities and create my own personal preference to use in my upcoming projects. ...
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How to print a string in fixed width?

I have this code (printing the occurrence of the all permutations in a string) 5 Answers ...
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Best practice using NSLocalizedString

I'm (like all others) using NSLocalizedString to localize my app. 9 Answers 9 ...