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How to overcome TypeError: unhashable type: 'list'
...pend(value)
else:
d[key] = [value]
print d
# {'AAA': ['111', '112'], 'AAC': ['123'], 'AAB': ['111']}
Note that if you are using Python 3.x, you'll have to make a minor adjustment to get it work properly. If you open the file with rb, you'll need to use line = line.split(b'x') (which mak...
C pointer to array/array of pointers disambiguation
...Mehrdad AfshariMehrdad Afshari
379k8383 gold badges822822 silver badges775775 bronze badges
4
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Time complexity of Euclid's Algorithm
..., which makes the analysis easier. You can divide it into cases:
Tiny A: 2a <= b
Tiny B: 2b <= a
Small A: 2a > b but a < b
Small B: 2b > a but b < a
Equal: a == b
Now we'll show that every single case decreases the total a+b by at least a quarter:
Tiny A: b % (a % b) < a a...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
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x := 1. So if you like to see what the functions return for y := 1, y := 2, y := 3 you
have to write f(1,1) , f(1,2) , f(1,3).
In Java 8, constructive functions should be handled (most of the time) by using method references because there's not much advantage of using a constructive lambda funct...
Why should I use a semicolon after every function in javascript?
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424
Semicolons after function declarations are not necessary.
The grammar of a FunctionDeclaration...
Shuffle an array with python, randomize array item order with python
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answered Jan 23 '09 at 18:37
David ZDavid Z
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What is tail call optimization?
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772
Tail-call optimization is where you are able to avoid allocating a new stack frame for a functio...
How do I keep track of pip-installed packages in an Anaconda (Conda) environment?
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120
conda-env now does this automatically (if pip was installed with conda).
You can see how this ...
SignalR - Sending a message to a specific user using (IUserIdProvider) *NEW 2.0.0*
.... This depends on how you identify a user in your application.
In SignalR 2.0, this is done by using the inbuilt IPrincipal.Identity.Name, which is the logged in user identifier as set during the ASP.NET authentication.
However, you may need to map the connection with the user using a different id...
Automatic post-registration user authentication
We're building a business app from the ground up in Symfony 2, and I've run into a bit of a snag with the user registration flow: after the user creates an account, they should be automatically logged in with those credentials, instead of being immediately forced to provide their credentials again.
...