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AppInventor2能画数据波形图吗? - App应用开发 - 清泛IT社区,为创新赋能!

请叫学长: Q:数据波形图可以吗  就通过单片机上发的数据 实时更新显示波形 类似这种,实时更新上传的数据为波形 A:图表组件可以画出这种图 Q:响应的速度 ms级别能跟上吗 A:这个倒是没有测试过。mark...
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为什么接收到的字符串数据都带括号了?如何处理? - App应用开发 - 清泛IT...

Q:为什么我接收到的字符串数据都带括号啊您知道怎么去除吗?奇怪的是我用调试软件接收到的也不带括号。 [hide]A:首先,如果文本输入出来多出了 中括号 [ 或 小括号 ( ,就考虑它不是文本类型,而是列表,尤其是列表...
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How I can I lazily read multiple JSON values from a file/stream in Python?

I'd like to read multiple JSON objects from a file/stream in Python, one at a time. Unfortunately json.load() just .read() s until end-of-file; there doesn't seem to be any way to use it to read a single object or to lazily iterate over the objects. ...
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Render HTML to PDF in Django site

...Try the solution from Reportlab. Download it and install it as usual with python setup.py install You will also need to install the following modules: xhtml2pdf, html5lib, pypdf with easy_install. Here is an usage example: First define this function: import cStringIO as StringIO from xhtml2pdf ...
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How to print the full traceback without halting the program?

...t_exc, in some corner cases, you will not obtain what you would expect. In Python 2.x: import traceback try: raise TypeError("Oups!") except Exception, err: try: raise TypeError("Again !?!") except: pass traceback.print_exc() ...will display the traceback of the ...
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Are there conventions on how to name resources?

... over a decade in VB, C++, ASP.NET, WinForms in C# and VB.NET, Android and Python. I never need to remember if Android calls it a textbox or an edittext. All I need to know is that lblFoo is the static label and txtFoo is what the user types input into. One final note is that no matter what conve...
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使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术

...rogram files (x86)\microsoft visual studio 11.0\vc\include\map(177): 参见正在编译的函数 模板 实例化“bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) const”的引用 1> with 1> [ 1> _Ty=std::string 1> ] 1> c:\program ...
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使用 C++ 处理 JSON 数据交换格式 - C/C++ - 清泛网 - 专注C/C++及内核技术

使用 C++ 处理 JSON 数据交换格式使用C++处理JSON数据交换格式一、摘要JSON的全称为:JavaScriptObject Notation,顾名思义,JSON是用于标记Javascript象的,JSON官方的...一、摘要 JSON 的全称为:JavaScript Object Notation,顾名思义,JSON 是...
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lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术

... int luaL_loadfile(lua_State *L, const char *filename); lua和c/c++的数据交互通过"栈"进行 ,操作数据时,首先将数据拷贝到"栈"上,然后获取数据,栈中的每个数据通过索引值进行定位,索引值为正时表示相于栈底的偏移索引,索引值为...
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应用程序无法正常启动0xc0150002 - C/C++ - 清泛网 - 专注C/C++及内核技术

...xxx\Debug\xxx.dll”的激活上下文生成失败。 找不到从属程序 Microsoft.VC80.DebugCRT,processorArchitecture="x86",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="8.0.50727.762"。 请使用 sxstrace.exe 进行详细诊断。 原来,我使用VS2013引用了VS2005编译...