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Max or Default?
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One of the two overloads of DefaultIfEmpty is supported in LINQ to SQL - the one that doesn't take parameters.
– DamienG
Dec 5 '08 at 17:46
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How to clear the cache of nginx?
... server, I have modified the CSS files, but nginx is still serving the old ones.
22 Answers
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Markdown to create pages and table of contents?
...ate a table of contents to assist while editing.
There might also be the one or the other library, who can generate TOCs: see Python Markdown TOC Extension.
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Getting the IP address of the current machine using Java
...e lots of network interfaces, and an interface could be bound to more than one IP address. And to top that, not all IP addresses will be reachable outside of your machine or your LAN. For example, they could be IP addresses for virtual network devices, private network IP addresses, and so on.
Wha...
How can I reliably get an object's address when operator& is overloaded?
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Update: in C++11, one may use std::addressof instead of boost::addressof.
Let us first copy the code from Boost, minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_ref( T &...
Is there a difference between /\s/g and /\s+/g?
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\s means "one space", and \s+ means "one or more spaces".
But, because you're using the /g flag (replace all occurrences) and replacing with the empty string, your two expressions have the same effect.
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How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
...eturns the concatenation of the lists:
concat = first_list + second_list
One disadvantage of this method is that twice the memory is now being used . For very large lists, depending on how you're going to use it once it's created, itertools.chain might be your best bet:
>>> import iterto...
Why .NET String is immutable? [duplicate]
...formance win in the case in question). With mutable objects that can't be done.
No side-effects can come from passing an immutable type as a method to a parameter unless it is out or ref (since that changes the reference, not the object). A programmer therefore knows that if string x = "abc" at the ...
Converting Dictionary to List? [duplicate]
...ust specify it between square brackets as shown above. And we could have done dictlist.append([key,value]) if we wanted to be as brief as possible.
Or just use dict.items() as has been suggested.
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How to convert a data frame column to numeric type?
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Here goes: first two columns are character. I've deliberately called 2nd one fake_char. Spot the similarity of this character variable with one that Dirk created in his reply. It's actually a numerical vector converted to character. 3rd and 4th column are factor, and the last one is "purely" numer...