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Convert a byte array to integer in Java and vice versa
...e classes found in the java.nio namespace, in particular, the ByteBuffer. It can do all the work for you.
byte[] arr = { 0x00, 0x01 };
ByteBuffer wrapped = ByteBuffer.wrap(arr); // big-endian by default
short num = wrapped.getShort(); // 1
ByteBuffer dbuf = ByteBuffer.allocate(2);
dbuf.putShort(n...
How to join two generators in Python?
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I think itertools.chain() should do it.
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How to get the current URL within a Django template?
I was wondering how to get the current URL within a template.
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if (key in object) or if(object.hasOwnProperty(key)
...ls us), will only return true if key is available on that object directly (its "owns" the property).
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How to install Homebrew on OS X?
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It's on the top of the Homebrew homepage.
From a Terminal prompt:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
The command brew install wget is an example of how to use Homebrew t...
Client-server synchronization pattern / algorithm?
... how distributed change management works. Look at SVN, CVS and other repositories that manage deltas work.
You have several use cases.
Synchronize changes. Your change-log (or delta history) approach looks good for this. Clients send their deltas to the server; server consolidates and distribu...
Eclipse hangs at the Android SDK Content Loader
I've been working with Eclipse 4.2 (Juno release 20120920-0800) on OS X 10.8.2 for a few weeks now, building apps for Android 3.0 and above. I have a quad core i7 MacBook Pro with an SSD, so performance is not an issue. Everything was fine.
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How do I fix "The expression of type List needs unchecked conversion…'?
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Since getEntries returns a raw List, it could hold anything.
The warning-free approach is to create a new List<SyndEntry>, then cast each element of the sf.getEntries() result to SyndEntry before adding it to your new list. Collections.checkedList does no...
How can I use pickle to save a dict?
...oked through the information that the Python docs give, but I'm still a little confused. Could somebody post sample code that would write a new file then use pickle to dump a dictionary into it?
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What do *args and **kwargs mean? [duplicate]
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Putting *args and/or **kwargs as the last items in your function definition’s argument list allows that function to accept an arbitrary number of arguments and/or keyword arguments.
For example, if you wanted to write a function that returned the sum of all its ar...