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App Inventor 2 上传文件到服务器的方案全总结 - App Inventor 2 中文网 - ...
1、图片Base64化，然后通过Web客户端POST文本的方式，发送数据，服务端base64解码后，存储文件。下载过程是Web客户端通过网络url下载文件到手机。
类似地，也可以将图片Base64化后分片存储到网络微数据库。下...
Vagrant error : Failed to mount folders in Linux guest
I have some issues with Vagrant shared folders, my base system is Ubuntu 13.10 desktop.
21 Answers
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Creating a system overlay window (always on top)
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Why is it wrong to use std::auto_ptr with standard containers?
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The C++ Standard says that an STL element must be "copy-constructible" and "assignable." In o...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
... ， 前6个字节为设备地址，后面是数据区，数据区最大31个字节，又分为若干个AD Sturcture，扩展广播包的最大长度为255字节。 数据区没用完的话，系统会在后面补0。
AD Stucture每个AD Stucture由 长度（1字节）、类型（1字节）、内...
How to “properly” print a list?
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In Python 2:
mylist = ['x', 3, 'b']
print '[%s]' % ', '.join(map(str, mylist))
In Python 3 ...
unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste
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OK, first of all, you don't have to get a reference to the module into a different name; you a...
How to remove newlines from beginning and end of a string?
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How can prepared statements protect from SQL injection attacks?
... injection example shows it (all examples in PHP/Mysql):
$expected_data = 1;
$query = "SELECT * FROM users where id=$expected_data";
will produce a regular query
SELECT * FROM users where id=1
while this code
$spoiled_data = "1; DROP TABLE users;"
$query = "SELECT * FROM users where i...