大约有 2,100 项符合查询结果（耗时：0.0223秒） [XML]
When to add what indexes in a table in Rails
...uble index:
Concrete example:
If you have:
default_scope :order => 'photos.created_at DESC, photos.version DESC'
You should add:
add_index :photos, [:created_at, :version]
Note:
An index takes up extra space on the disk and makes it slower to create and update each record, because it has...
Save image from URL by paperclip
... 'rubygems'
require 'open-uri'
require 'paperclip'
model.update_attribute(:photo,open(website_vehicle.image_url))
In model
class Model < ActiveRecord::Base
has_attached_file :photo, :styles => { :small => "150x150>", :thumb => "75x75>" }
end
...
How to detect when cancel is clicked on file input?
...novel solution. I have a Progressive Web App which allows users to capture photos and videos and upload them. We use WebRTC when possible, but fall back to HTML5 file pickers for devices with less support *cough Safari cough*. If you're working specifically on an Android/iOS mobile web application w...
How to delete a whole folder and content?
...
im basically trying to delete all the photos so doesnt matter is DCIM is not deleted as long as the photos are...so even deleting 100MEDIA the folder within this would do the job
– Beginner
Feb 9 '11 at 11:00
...
How to enable file sharing for my app?
I have an image editing app where users can apply effects to photos. How could I enable it so that users can see my app in iTunes in the File Sharing tab and then just drag+drop photos to the app?
...
Navigation bar show/hide
...
If this is for a photo viewer application, hiding the nav bar causes an unpleasant jump for the image view, which I haven't found how to prevent. 3.2 lets you use UIGestureRecognizer for double taps, which is a much neater approach (for iPad...
How do I find Waldo with Mathematica?
...for some definition of 'useful'.) (This reminds me of some of the things iPhoto will sometimes identify as a face in our photo collection...)
– Brett Champion
Dec 12 '11 at 20:21
...
jQuery trigger file input
...rc="http://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Icon_-_upload_photo_2.svg/512px-Icon_-_upload_photo_2.svg.png" width="20px" height="20px"/>
</label>
<input type="file" value="upload" id="uploadFile" class="uploadFile" />
</div>
</body>
...
What is the maximum amount of RAM an app can use?
... RAM allocation but instantly jumps up to 90Mb when you start loading some photos in memory. When you open Activity with a ViewPager with preloaded photos (3,5Mb each) you can get 190Mb easily in seconds.
But this doesn't mean you have issues with memory management.
The best advice I can give is ...
Find a file in python
...areful of case sensitivity. for name in files: will fail looking for super-photo.jpg when it's super-photo.JPG in the file system. (an hour of my life I'd like back ;-) Somewhat messy fix is if str.lower(name) in [x.lower() for x in files]
– matt wilkie
Dec 16 ...