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Why '&&' and not '&'?
...ring value;
if(dict.TryGetValue(key, out value) && value.Contains("test"))
{
// Do Something
}
TryGetValue returns false if the supplied key is not found in the dictionary. Because of the short-circuiting nature of &&, value.Contains("test") is only executed, when TryGetValue r...
Are the shift operators () arithmetic or logical in C?
...ements an arithmetic shift on signed values.
Basically you need to either test your compiler or not rely on it. My VS2008 help for the current MS C++ compiler says that their compiler does an arithmetic shift.
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How to avoid isset() and empty()
...ost', 'N/A');
As an additional example, take the RealIP() function for a test:
$ip = Value($_SERVER, 'HTTP_CLIENT_IP', Value($_SERVER, 'HTTP_X_FORWARDED_FOR', Value($_SERVER, 'REMOTE_ADDR')));
Neat, huh? ;)
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How does a public key verify a signature?
...em -pubin -in message.ssl -out message.txt
Below is an example script to test this whole flow with openssl.
#!/bin/sh
# Create message to be encrypted
echo "Creating message file"
echo "---------------------"
echo "My secret message" > message.txt
echo "done\n"
# Create asymmetric keypair
ech...
Difference between open and codecs.open in Python
...
In Python 2 there are unicode strings and bytestrings. If you just use bytestrings, you can read/write to a file opened with open() just fine. After all, the strings are just bytes.
The problem comes when, say, you have a unicode string and you do the following:
>...
Custom attributes - Yea or nay?
... comment.data.replace(/\n|\r\n/g, '');
if ( /^\s*?\{.+\}\s*?$/.test(cData) ) {
try {
data(comment.parentNode).commentJSON =
(new Function('return ' + cData + ';'))();
} catch(e) {}
}
}
...
Django: “projects” vs “apps”
...easonable to have something like:
site/
models.py
settings.py
tests.py
urls.py
views.py
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When to use MongoDB or other document oriented database systems? [closed]
...ven’t used MongoDB in production, but I have used it a little building a test app and it is a very cool piece of kit. It seems to be very performant and either has, or will have soon, fault tolerance and auto-sharding (aka it will scale). I think Mongo might be the closest thing to a RDBMS replace...
How to get string objects instead of Unicode from JSON?
...json.loads('[' * 991 + ']' * 991)). It crashes at 992. So at least in this test, Mark's can go deeper, contrary to what you said.
– Stefan Pochmann
May 3 '17 at 21:26
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Get the first item from an iterable that matches a condition
...
As a reusable, documented and tested function
def first(iterable, condition = lambda x: True):
"""
Returns the first item in the `iterable` that
satisfies the `condition`.
If the condition is not given, returns the first item of
the ...