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https://bbs.tsingfun.com/thread-1209-1-1.html 

pdf预览功能研究形成文档:[url]https://puravidaapps.com/snippets.php#2p...

pdf预览功能研究形成文档:https://puravidaapps.com/snippets.php#2pdfpdf完成,但这个文档里面还有很多东西,需要整理。
https://bbs.tsingfun.com/thread-1726-1-1.html 

App Inventor 2 复制屏幕功能,误删组件的“后悔药”,界面设计更便捷 - Ap...

“复制屏幕”功能全新上线,中文网独有(MIT没有此功能),可以复制屏幕中的普通组件、图片、附件、拓展、代码块。更多升级详情可查看发布日志。下面演示一下屏幕的复制效果:1、Screen1屏幕上有若干组件、及一个SQLite拓...
https://bbs.tsingfun.com/thread-3037-1-1.html 

运动软件设计问题 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

本帖最后由 wwwwwwwwwwww 于 2026-07-03 10:55 编辑 我要做一个运动软件,里面有一个轨迹图功能,我应该怎么做出来?需要用什么组件?而且我需要怎么处理运动距离过远的时候缩放和自动保存? 地图相关组件,画线组件,地图本...
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Set margin size when converting from Markdown to PDF with pandoc

... an HTML and .md file. Next, I used pandoc to convert the .md file into a PDF file (I get an error if I try and convert from the .html file). However, the PDF that is produced have massive margins (like this http://johnmacfarlane.net/pandoc/demo/example13.pdf ). How can I get pandoc to produce s...
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C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...: -1; } 该模板根据地一个参数是否等于、大于、或小于第二个参数而分别返回零或+/-1。它是典型的用于集合排序时的排序函数。它假设类型 T 具备 operator== 和 operator> 操作,并支持 int,float,double 或 DWORD 类型。但它不能应用...
https://bbs.tsingfun.com/thread-1872-1-1.html 

MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区,为创新赋能!

... 2009年MQTT协议诞生10周年生日发明起因TCP协议和MQTT协议的设计都与卫星通信有着直接的联系。1972年时,Kahn在IPTO公司参与了一个卫星通信网络项目,他就搞了个子项目来搭建卫星基站的无线电数据包通信网络。通过这个项目的经...
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Force to open “Save As…” popup open at text link click for PDF in HTML

I have some big size PDF catalogs at my website, and I need to link these as download. When I googled, I found such a thing noted below. It should open the " Save As... " popup at link click... ...
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How to make input type= file Should accept only pdf and xls

...stion). Example: <input type="file" name="upload" accept="application/pdf,application/vnd.ms-excel" /> To your third question "And when I click the files (PDF/XLS) on webpage it automatically should open.": You can't achieve that. How a PDF or XLS is opened on the client machine is set by...
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CSS attribute selector does not work a href

...s will make the attribute value to match the end of the string. a[href$='.pdf'] { /*css*/ } JSFiddle: http://jsfiddle.net/UG9ud/ E[foo] an E element with a "foo" attribute (CSS 2) E[foo="bar"] an E element whose "foo" attribute value is exactly equal to "bar" (CSS 2) E[foo~="bar"] an E e...
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Fitting empirical distribution to theoretical ones with Scipy (Python)?

...-2] scale = params[-1] # Calculate fitted PDF and error with fit in distribution pdf = distribution.pdf(x, loc=loc, scale=scale, *arg) sse = np.sum(np.power(y - pdf, 2.0)) # if axis pass in add to plot ...