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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
...路
1、发送/接收如果是非预期或随机的乱码，大概率是波特率设置不对，改为9600试试。
2、默认是GBK编码，非UTF-8的，如“你好”对应16进制：C4 E3 BA C3。而AI2中文字符串默认是UTF-8编码的（E4 BD A0 E5 A5 BD ）。
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Creating email templates with Django
... e-mail you want to use alternative content-types, like this:
from django.core.mail import EmailMultiAlternatives
subject, from_email, to = 'hello', 'from@example.com', 'to@example.com'
text_content = 'This is an important message.'
html_content = '<p>This is an <strong>important</s...
/data/user/0/xxxx/files（内部存储）和 /storage/emulated/0/Android/data...
...AGE（写权限）适用场景高安全性数据（如密钥、数据库）大型文件（如图片、视频缓存）或需用户手动备份的文件。多用户支持路径自动适配（如 /data/user/10/xxxx）路径固定（用户切换时仍指向当前用户的存储）。
4. 用户与系统...
Timer function to provide time in nano seconds using C++
...ay want to make sure you do not have those chipset. Additionally some dual core AMDs may also cause a problem. See the second post by sebbbi, where he states:
QueryPerformanceCounter() and
QueryPerformanceFrequency() offer a
bit better resolution, but have
different issues. For example in
...
How to make Eclipse behave well in the Windows 7 taskbar?
...s not have an AppID at startup. First the JVM is started, then the eclipse core/platform is started, and then the startup plugin is loaded. In this last stage, an API call is done to set the AppID to the value inside a plugin.xml file. See above: extended HOWTO item 2
When you drag a manually create...
How to create custom easing function with Core Animation?
...
I found this:
Cocoa with Love - Parametric acceleration curves in Core Animation
But I think it can be made a little simpler and more readable by using blocks. So we can define a category on CAKeyframeAnimation that looks something like this:
CAKeyframeAnimation+Parametric.h:
// this sho...
当VC问你打算怎么招贤纳士的时候 你该这么答 - 资讯 - 清泛网 - 专注C/C++及内核技术
...Homebrew.
“扩建团队”往往是初创公司拿到投资之后的一大用途。不论是为现有项目增加资金，还是为团队招募新的人才，掩盖筹资讲稿背后的真实目的是不对的。我所感兴趣的不仅仅是招募的人员将来会完成什么工作，更多的...
Programmatically saving image to Django ImageField
...ff the web and stores it in a model. The important bits are:
from django.core.files import File # you need this somewhere
import urllib
# The following actually resides in a method of my model
result = urllib.urlretrieve(image_url) # image_url is a URL to an image
# self.photo is the ImageFie...
Secure hash and salt for PHP passwords
...nism.
PHP 5.5 or higher: password_hash() is good quality and part of PHP core.
Older PHP versions: OpenWall's phpass library is much better than most custom code - used in WordPress, Drupal, etc.
Most programmers just don't have the expertise to write crypto related code safely without introduci...
django import error - No module named core.management
Ok, I see plenty of these errors around. I have tried everything I know to do and have yet to figure this out.
29 Answers
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