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App Inventor 2 图片缩放并返回Base64文本 - App应用开发 - 清泛IT社区，为创新赋能！
图片缩放并Base64化 参考代码如下：（注：图片可拖动至编程区，自动还原代码块）
参考用法如下：
其中，用到的SimpleBase64拓展，点此查看。其中，用到的TaifunImage拓展，点此查看。
来源中文文档：https://www.fun123.cn/reference/ ......
How can I transition height: 0; to height: auto; using CSS?
... max-height to something bigger than your box will ever get.
See JSFiddle demo provided by Chris Jordan in another answer here.
#menu #list {
max-height: 0;
transition: max-height 0.15s ease-out;
overflow: hidden;
background: #d5d5d5;
}
#menu:hover #list {
max-heig...
The provider is not compatible with the version of Oracle client
...
You should "ignore" all the x86/x64 talk here for starters and instead try the ODP.NET Managed Driver (if you are using .Net v4+):
https://www.nuget.org/packages/Oracle.ManagedDataAccess/
https://www.nuget.org/packages/Oracle.ManagedDataAccess.EntityFramew...
Rails 4 multiple image or file upload using carrierwave
...avatar:string
rake db:migrate
In post.rb
class Post < ActiveRecord::Base
has_many :post_attachments
accepts_nested_attributes_for :post_attachments
end
In post_attachment.rb
class PostAttachment < ActiveRecord::Base
mount_uploader :avatar, AvatarUploader
belongs_to :post
end...
How to extract the year from a Python datetime object?
...ey thing to note is that the time components can differ between 32-bit and 64-bit pythons in some python versions (2.5.x tree I think). So you will find things like hour/min/sec on some 64-bit platforms, while you get hour/minute/second on 32-bit.
...
What do the terms “CPU bound” and “I/O bound” mean?
...number and crunches it a lot:
serial
parallel
Sorting appears to be CPU based on the following experiment: Are C++17 Parallel Algorithms implemented already? which showed a 4x performance improvement for parallel sort, but I would like to have a more theoretical confirmation as well
The well kno...
How do I create some kind of table of content in GitHub wiki?
...
It is nicely demonstrated in the Table of Contents of the Markdown Cheatsheet.
##### Table of Contents
[Headers](#headers)
[Emphasis](#emphasis)
...snip...
<a name="headers"/>
## Headers
If you hover over a Header in a ...
How to use icons and symbols from “Font Awesome” on Native Android Application
...nd:fonticon:0.1.9'
}
Get demo on Google Play.
You can easily add font-based icon in your layout:
<com.shamanland.fonticon.FontIconView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ic_android"
android:textSize="@dimen/icon_siz...
Quickly find whether a value is present in a C array?
...ion. It can be modified to run in a fixed number of cycles to avoid timing-based forensics if the location of the value is sensitive information.
– OregonTrail
Sep 5 '14 at 16:17
1...
#1071 - Specified key was too long; max key length is 1000 bytes
...e column. INT is always 4 bytes, and it always allows values from -2147483648 to 2147483647. The numeric argument is about padding values during display, which has no effect unless you use the ZEROFILL option.
share
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