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How to express a NOT IN query with ActiveRecord/Rails?
Just to update this since it seems a lot of people come to this, if you are using Rails 4 look at the answers by Trung Lê` and VinniVidiVicci.
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Create a list from two object lists with linq
I have the following situation
8 Answers
8
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Intellij IDEA, format all code in a project
I really like IDEA's code formatting, but how do I get it to reformat all the code in a particular project without going through each file? I've found the option to tidy / optimise imports on code before committing it to subversion which is great, but it only seems to apply to files that have otherw...
How does HTTP file upload work?
When I submit a simple form like this with a file attached:
5 Answers
5
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Unable to show a Git tree in terminal
Killswitchcollective.com's old article, 30 June 2009 , has the following inputs and outputs
6 Answers
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How to convert a string to lower case in Bash?
Is there a way in bash to convert a string into a lower case string?
20 Answers
20
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Postgres could not connect to server
After I did brew update and brew upgrade, my postgres got some problem. I tried to uninstall postgres and install again, but it didn't work as well.
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Python: fastest way to create a list of n lists
So I was wondering how to best create a list of blank lists:
5 Answers
5
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What does cherry-picking a commit with Git mean?
Recently, I have been asked to cherry-pick a commit.
12 Answers
12
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insert vs emplace vs operator[] in c++ map
...maps.)
Here's an example to demonstrate:
#include <vector>
struct foo
{
explicit foo(int);
};
int main()
{
std::vector<foo> v;
v.emplace(v.end(), 10); // Works
//v.insert(v.end(), 10); // Error, not explicit
v.insert(v.end(), foo(10)); // Also works
}
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