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Convert a character digit to the corresponding integer in C

...the same for letters, for example: char c = 'b'; int x = c - 'a'; // x is now not necessarily 1 The standard guarantees that the char values for the digits '0' to '9' are contiguous, but makes no guarantees for other characters like letters of the alphabet. ...
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How do I convert an interval into a number of hours with postgres?

...you want integer i.e. number of days: SELECT (EXTRACT(epoch FROM (SELECT (NOW() - '2014-08-02 08:10:56')))/86400)::int share | improve this answer | follow |...
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Greenlet Vs. Threads

...lution with multiprocessing to achieve higher throughput? 2)I still don't know why ever use threads? Can we consider them as a naive and basic implementation of concurrency in python standard library? – Rsh Mar 24 '13 at 8:23 ...
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What is the best IDE to develop Android apps in? [closed]

...S Android Studio has officially come out of beta and been released. It is now the official IDE for Android Development - Eclipse won't be supported anymore. It is definitely the IDE of choice for Android Development. Link to download page: http://developer.android.com/sdk/index.html NEWS As of ...
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How to subtract X day from a Date object in Java?

...h Java 8's date time API change, Use LocalDate LocalDate date = LocalDate.now().minusDays(300); Similarly you can have LocalDate date = someLocalDateInstance.minusDays(300); Refer to https://stackoverflow.com/a/23885950/260990 for translation between java.util.Date <--> java.time.LocalDa...
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Is it possible to change icons in Visual Studio 2012?

...her - http://vsip.codeplex.com Long Answer: Doing this with a plugin, for now, is out of the question. I've been unable to find any built-in way to achieve this and the switch to WPF makes it even harder to hack around. This app simply extracts the image resources from the unmanaged DLLs in Visual...
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Uninstall / remove a Homebrew package including all its dependencies

... EDIT: It looks like the issue is now solved using an external command called brew rmdeps or brew rmtree. To install and use, issue the following commands: $ brew tap beeftornado/rmtree $ brew rmtree <package> See the above link for more information...
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Generate random number between two numbers in JavaScript

...the equation, this is equivalent to 0 <= (X - min) <= (max - min) Now, lets multiply this with a random number r which is 0 <= (X - min) * r <= (max - min) * r Now, lets add back min to the equation min <= min + (X - min) * r <= min + (max - min) * r Now, lets chose a funct...
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]

...your laptop (-Y with X-forwarding) $ssh -Y pi@10.42.0.96 Lo and behold! Now your RPi is connected to your laptop and RPi can share the WiFi connection. pi@raspberrypi ~ $ Share display & keyboard of your laptop with RPi Install vncserver on Raspberry Pi $ sudo apt-get update $ sudo ap...
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How to check if a number is a power of 2

...that is, the result is true if and only if both its operands are true. Now let's take a look at how this all plays out: The function returns boolean (true / false) and accepts one incoming parameter of type unsigned long (x, in this case). Let us for the sake of simplicity assume that someone ...