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How does Duff's device work?
I've read the article on Wikipedia on the Duff's device , and I don't get it. I am really interested, but I've read the explanation there a couple of times and I still don't get it how the Duff's device works.
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ActiveRecord: size vs count
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You should read that, it's still valid.
You'll adapt the function you use depending on your needs.
Basically:
if you already load all entries, say User.all, then you should use length to avoid another db query
if you haven't anythin...
How can I decompress a gzip stream with zlib?
...ngIO(gzip_data)
>>> f = gzip.GzipFile(fileobj=fio)
>>> f.read()
'test'
>>> f.close()
automatic header detection (zlib or gzip)
adding 32 to windowBits will trigger header detection
>>> zlib.decompress(gzip_data, zlib.MAX_WBITS|32)
'test'
>>> zlib.deco...
Unable to resolve host “”; No address associated with hostname [closed]
In my Android application for reading RSS links, I am getting this error:
17 Answers
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What is a semaphore?
...emaphore is a programming concept that is frequently used to solve multi-threading problems. My question to the community:
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How to send data to local clipboard from a remote SSH session
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I'm resurrecting this thread because I've been looking for the same kind of solution, and I've found one that works for me. It's a minor modification to a suggestion from OSX Daily.
In my case, I use Terminal on my local OSX machine to connect to a...
Compression/Decompression string with C#
... {
byte[] bytes = new byte[4096];
int cnt;
while ((cnt = src.Read(bytes, 0, bytes.Length)) != 0) {
dest.Write(bytes, 0, cnt);
}
}
public static byte[] Zip(string str) {
var bytes = Encoding.UTF8.GetBytes(str);
using (var msi = new MemoryStream(bytes))
using (v...
How does Python's super() work with multiple inheritance?
...itance starts crossing paths (for example if First inherited from Second). Read the link above for more details, but, in a nutshell, Python will try to maintain the order in which each class appears on the inheritance list, starting with the child class itself.
So, for instance, if you had:
class ...
Why does 'continue' behave like 'break' in a Foreach-Object?
...lines of code preceding my if statement into a single long line of hard to read code. However, that would work for me in other situations.
– Justin Dearing
Oct 13 '11 at 21:07
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Multiple queries executed in java in single statement
... to the database url. This is additional connection property to those if already exists some, like autoReConnect=true, etc.. Acceptable values for allowMultiQueries property are true, false, yes, and no. Any other value is rejected at runtime with an SQLException.
String dbUrl = "jdbc:mysql:///te...