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Ruby on Rails - Import Data from a CSV file
I would like to import data from a CSV file into an existing database table. I do not want to save the CSV file, just take the data from it and put it into the existing table. I am using Ruby 1.9.2 and Rails 3.
...
How to determine the screen width in terms of dp or dip at runtime in Android?
...ightPixels / density;
float dpWidth = outMetrics.widthPixels / density;
OR
Thanks @Tomáš Hubálek
DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
float dpHeight = displayMetrics.heightPixels / displayMetrics.density;
float dpWidth = displayMetrics.widthPixels /...
Difference Between Cohesion and Coupling
...
Cohesion refers to what the class (or module) can do. Low cohesion would mean that the class does a great variety of actions - it is broad, unfocused on what it should do. High cohesion means that the class is focused on what it should be doing, i.e. only meth...
Input type=password, don't let browser remember the password
I remember seeing a way to have an <input type="password" /> such that the browser will not prompt the user to save the password. But I'm drawing a blank. Is there an HTML attribute or some JavaScript trick that will do this?
...
How do I print a double value with full precision using cout?
...
You can set the precision directly on std::cout and use the std::fixed format specifier.
double d = 3.14159265358979;
cout.precision(17);
cout << "Pi: " << fixed << d << endl;
You can #include <limits> to get the maximum precision of a float or double.
#include &...
What is token-based authentication?
...ication system is
simple. Allow users to enter their
username and password in order to
obtain a token which allows them to
fetch a specific resource - without
using their username and password.
Once their token has been obtained,
the user can offer the token - which
offers access to ...
Is $(document).ready necessary?
...ocument).ready necessary?
no
if you've placed all your scripts right before the </body> closing tag, you've done the exact same thing.
Additionally, if the script doesn't need to access the DOM, it won't matter where it's loaded beyond possible dependencies on other scripts.
For many CMS'...
What's the difference between “declare class” and “interface” in TypeScript
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interface is for when you simply want to describe the shape of an object. There's no code generation, ever, for interfaces -- they're solely an artifact in the type system. You'll see no difference in the code generation for a class depend...
Do I need to close() both FileReader and BufferedReader?
...
no.
BufferedReader.close()
closes the stream according to javadoc for BufferedReader and InputStreamReader
as well as
FileReader.close()
does.
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Is there any reason to use a synchronous XMLHttpRequest?
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I think they might become more popular as HTML 5 standards progress. If a web application is given access to web workers, I could foresee developers using a dedicated web worker to make synchronous requests for, as Jonathan said, to ensure one request...