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How to check if a Unix .tar.gz file is a valid file without uncompressing?
I have found the question How to determine if data is valid tar file without a file? , but I was wondering: is there a ready made command line solution?
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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...
How to assign string to bytes array
... The OP asked about an array, not a slice. In some cases you need to limit the size of the slice and use an array instead. My answer below trims the extra chars to make sure you do not overflow the array.
– DavidG
Feb 14 '16 at 5:17
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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.
10 Answers
10
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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...
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...