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Save image from URL by paperclip
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Here is a simple way:
require "open-uri"
class User < ActiveRecord::Base
has_attached_file :picture
def picture_from_url(url)
self.picture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
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Where do I put image files, css, js, etc. in Codeigniter?
...with codeigniter's autoload configuration.
Note: autoload URL helper for base_url() access.
application/config/autoload.php:
$autoload['helper'] = array('url','utility');
You will then have access to asset_url() throughout your code.
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Best approach to converting Boolean object to string in java
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I don't think there would be any significant performance difference between them, but I would prefer the 1st way.
If you have a Boolean reference, Boolean.toString(boolean) will throw NullPointerException if your reference is null. As the reference is unboxed to boolean be...
Best way to clear a PHP array's values
Which is more efficient for clearing all values in an array? The first one would require me to use that function each time in the loop of the second example.
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C# Float expression: strange behavior when casting the result float to int
...uate tmp2
Update: As noted in the comments, the expression 6.2f * 10 is formally a float since the second parameter has an implicit conversion to float which is better than the implicit conversion to double.
The actual issue is that the compiler is permitted (but not required) to use an intermedi...
how to remove shared preference while application uninstall in android
...n android application to save the login details such as user name and password via SharedPreferences thats works fine, but i need to remove all my used SharedPreferences while my application uninstall. How to do it?
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Install an apk file from command prompt?
...I want to build after compiling all the .jar files to create an .apk file for an Android application without using Eclipse.
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Override browser form-filling and input highlighting with HTML/CSS
I have 2 basic forms -- sign in and sign up, both on the same page. Now, I have no problem with the sign in form auto-filling, but the sign up form auto fills as well, and I don't like it.
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Display image as grayscale using matplotlib
...ot.imshow() . My problem is that the grayscale image is displayed as a colormap. I need the grayscale because I want to draw on top of the image with color.
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How to create a string with format?
I need to create a string with format which can convert int, long, double etc. types into string. Using Obj-C, I can do it via below way.
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