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Best practices to handle routes for STI subclasses in rails
... I had to set url explicitly in order for it to both render the from and saves properly. <%= form_for @child, :as => :child, url: @child.becomes(Parent)
– lulalala
May 28 '12 at 6:55
...
How do I execute a Git command without being in the repository?
...ptions --git-dir and --work-tree are not existing to access the repository from outside the work tree, they are used to move the .git somewhere else, and they are much more complicated to use in some cases.
For instance, to get the log of /home/repo/subdir only:
git -C /home/repo/subdir log .
or...
Static constant string (class member)
...lass definition) is only allowed with integral and enum types.
Starting from C++17 you have another option, which is quite similar to your original declaration: inline variables
// In a header file (if it is in a header file in your case)
class A {
private:
inline static const string ...
Dynamic constant assignment
...se case leading to this Ruby error is when you build the value in a method from other run-time assets (variables, command-line arguments, ENV), typically in a constructor e.g. def initialize(db,user,password) DB=Sequel.connect("postgres://#{user}:#{password}@localhost/#{db}") end. It's one of those ...
iOS: How to get a proper Month name from a number?
...ols] objectAtIndex:(monthNumber-1)];
Note that you'll need to subtract 1 from your 1..12 monthNumber since monthSymbols is zero-based.
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Why does C# allow {} code blocks without a preceding statement?
..., does declaring a variable within a block cause the variable to be scoped from the perspective of the run-time? From what I can tell, variables' lifetimes are often not bounded by scoping blocks, a fact which is observable in mixed-language projects if the first thing done with a variable in a loo...
Suppress command line output
...0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, which was just redirected to the null device.
This syntax is (loosely) borrowed from many Unix shells, but you do have to be careful because there are subtle differences between the shell syntax and ...
Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
...vaScript basically since its inception. I don't think his advice is coming from "I'm lazy and inattentive inexperienced hacker" -- that's why I'm trying to understand where it's coming from.
– artlung
Jun 9 '09 at 17:22
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Can vim monitor realtime changes to a file
...changes. However (depending on your platform), you have to give it focus.
From the help:
When a file has been detected to have
been changed outside of Vim and it
has not been changed inside of Vim,
automatically read it again. When the
file has been deleted this is not
done.
...
Extracting text OpenCV
...
You can detect text by finding close edge elements (inspired from a LPD):
#include "opencv2/opencv.hpp"
std::vector<cv::Rect> detectLetters(cv::Mat img)
{
std::vector<cv::Rect> boundRect;
cv::Mat img_gray, img_sobel, img_threshold, element;
cvtColor(img, img_g...