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How to start two threads at “exactly” the same time
The threads should start at same split second. I understand, if you do thread1.start() , it will take some milliseconds before the next execution of thread2.start() .
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How do I get a background location update every n minutes in my iOS application?
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I found a solution to implement this with the help of the Apple Developer Forums:
Specify location background mode
Create an NSTimer in the background with UIApplication:beginBackgroundTaskWithExpirationHandler:
When n is smaller than UIApplication:backgroundTi...
How to remove non-alphanumeric characters?
... like you almost knew what you wanted to do already, you basically defined it as a regex.
preg_replace("/[^A-Za-z0-9 ]/", '', $string);
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What's the pythonic way to use getters and setters?
I'm doing it like:
8 Answers
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How to reference style attributes from a drawable?
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In my experience it is not possible to reference an attribute in an XML drawable.
In order to make your theme you need to:
Create one XML drawable per theme.
Include the needed color into you drawable directly with the @color tag or #RGB fo...
Algorithm to find Largest prime factor of a number
...ethod which is very fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) = a^2 - b^2 and is easy to understand and implement. Unfortunately it's not very fast in general.
The best known method for fa...
if A vs if A is not None:
...uivalents 0 or 1. When this method is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero. If a class defines neither __len__() nor __nonzero__(), all its instances are considered true.
On the other hand,
if A is not None:
compares only...
How to escape single quotes in MySQL
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Put quite simply:
SELECT 'This is Ashok''s Pen.';
So inside the string, replace each single quote with two of them.
Or:
SELECT 'This is Ashok\'s Pen.'
Escape it =)
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Camera orientation issue in Android
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There are quite a few similar topics and issues around here. Since you're not writing your own camera, I think it boils down to this:
some devices rotate the image before saving it, while others simply add the orientation tag in the pho...
How can I read large text files in Python, line by line, without loading it into memory?
...o read each line, but obviously I do not want to use readlines() because it will create a very large list in the memory.
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