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How to sum all the values in a dictionary?
...alues of the dictionary's keys, a utility function can be helpful:
import sys
def itervalues(d):
return iter(getattr(d, ('itervalues', 'values')[sys.version_info[0]>2])())
sum(itervalues(d))
This is essentially what Benjamin Peterson's six module does.
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How to get current time and date in C++?
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std C libraries provide time().
This is seconds from the epoch and can be converted to date and H:M:S using standard C functions. Boost also has a time/date library that you can check.
time_t timev;
time(&timev);
sha...
How to round a number to n decimal places in Java
What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
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Function passed as template argument
...code. So the instantiated code for do_op with fadd looks something like:
convert a and b from int to float.
call the function ptr op with float a and float b.
convert the result back to int and return it.
By comparison, our by-value case requires an exact match on the function arguments.
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From Arraylist to Array
I want to know if it is safe/advisable to convert from ArrayList to Array?
I have a text file with each line a string:
9 An...
How to convert float to varchar in SQL Server
I have a float column with numbers of different length and I'm trying to convert them to varchar.
15 Answers
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How to check Django version
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For Python:
import sys
sys.version
For Django (as mentioned by others here):
import django
django.get_version()
The potential problem with simply checking the version, is that versions get upgraded and so the code can go out of date. You w...
What is the type of lambda when deduced with “auto” in C++11?
...().
A lambda which captures no variables (nothing inside the []'s) can be converted into a function pointer (MSVC2010 doesn't support this, if that's your compiler, but this conversion is part of the standard).
But the actual type of the lambda isn't a function pointer. It's some unspecified funct...
How to create Drawable from resource
...showing.setImageResource(R.drawable.one);
only then the drawable will we converted exactly.
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Encrypting & Decrypting a String in C# [duplicate]
... cryptoStream.Close();
return Convert.ToBase64String(cipherTextBytes);
}
}
}
}
}
}
public static string Decrypt(string cipherText, string ...