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App Inventor 2 OCR 自研拓展：离线图片文字识别（Tesseract 5） · App Inventor 2 中文网
... 界面上的图像组件
RecognizeImageComponent
Base64 编码的图片数据
RecognizeBase64
典型场景：拍答题卡取题、识别商品标签、从截图里抽文字、无障碍朗读前取词等。
技术原理与内部框架
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How to list of all the tables defined for the database when using active record?
How do I get a list of all the tables defined for the database when using active record?
5 Answers
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Disable Required validation attribute under certain circumstances
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{
[Required]
public override string ID
{
get { return base.ID; }
set { base.ID = value; }
}
}
This way, you don't have to bother with client/server side validations, the framework will behave the way it's supposed to. Also, if you define a [Display] attribute on th...
Update Item to Revision vs Revert to Revision
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If you try to commit an item with older BASE-Revision than HEAD, you will get an "commit failed: your working copy is propbably out of date"
– Peter Parker
Aug 2 '09 at 10:35
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Including another class in SCSS
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Try this:
Create a placeholder base class (%base-class) with the common
properties
Extend your class (.my-base-class) with this placeholder.
Now you can extend %base-class in any of your classes (e.g. .my-class).
%base-class {
width: 80%;
margin-lef...
Why does parseInt yield NaN with Array#map?
...rn. The first is the same as not supplying the parameter, so it defaulted based on the input (base 10, in this case). Base 1 is an impossible number base, and 3 is not a valid number in base 2:
parseInt('1', 0); // OK - gives 1
parseInt('2', 1); // FAIL - 1 isn't a legal radix
parseInt('3', 2); /...
Does SVG support embedding of bitmap images?
...;image
width="100" height="100"
xlink:href="data:image/png;base64,IMAGE_DATA"
/>
...
</svg>
The svg element attribute xmlns:xlink declares xlink as a namespace prefix and says where the definition is. That then allows the SVG reader to know what xlink:href means...
What does inverse_of do? What SQL does it generate?
... through a relationship.
Their example:
class Dungeon < ActiveRecord::Base
has_many :traps, :inverse_of => :dungeon
has_one :evil_wizard, :inverse_of => :dungeon
end
class Trap < ActiveRecord::Base
belongs_to :dungeon, :inverse_of => :traps
end
class EvilWizard < ActiveRe...
Why would one use REST instead of SOAP based services? [closed]
...) why REST is in anyway better or simpler to use and implement than a SOAP based Services stack.
11 Answers
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ASP.NET MVC 404 Error Handling [duplicate]
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Nice! :) ErrorsController could inherit from the same base as all other controllers and thus have access to a certain functionality. Moreover, Error404 view could be wrapped in master providing the user with overall look and feel of the rest of the site without any extra work.
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