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多媒体组件 · App Inventor 2 中文网
...应该减少媒体文件的数量或它们的大小。大多数视频编辑软件，例如 Windows Movie Maker 和 Apple iMovie，可以帮助你减小视频的大小，或将视频重新编码为更紧凑的格式。
你还可以将媒体源设置为指向流式视频的 URL，但该 URL 必须指...
Is there a float input type in HTML5?
...
@relipse see here: stackoverflow.com/q/3790935/1180785 but be sure to read the comments for each answer; it looks like all options have drawbacks, and you'll need to see what fits your particular needs.
– Da...
How to convert SQL Query result to PANDAS Data Structure?
...ill only work with results obtained using sqlalchemy. Pyodbc uses the description attribute for columns.
– Filip
Aug 29 '19 at 21:06
...
Sleeping in a batch file
...alling it (it has other uses too :), just create the following sleep.py script and add it somewhere in your PATH:
import time, sys
time.sleep(float(sys.argv[1]))
It will allow sub-second pauses (for example, 1.5 sec, 0.1, etc.), should you have such a need. If you want to call it as sleep rather t...
Testing web application on Mac/Safari when I don't own a Mac
...courts have judged Hackintosh are nothing else than a violation of Apple's IP. I don't think it is a good idea to encourage piracy on SO.
– KPM
Aug 16 '12 at 0:36
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Mozilla PDF.js：PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ice中创建大量的微小的图像，矢量元素/图片）;
5.使用的网络优化格式的PDF;
6.修复或不产生不符合PDF32000规范的PDF文件。
回答网友提问 2015-1-19
chrome是可以通过参数传值方式打开PDF的，我用的版本是39.0.2171.95 m
回答...
How to use the 'main' parameter in package.json?
... folder.
For most modules, it makes the most sense to have a main script and
often not much else.
To put it short:
You only need a main parameter in your package.json if the entry point to your package differs from index.js in its root folder. For example, people often put the entry poin...
Best way to check if a URL is valid
...g filter_var() will fail for urls with non-ascii chars, e.g. (http://pt.wikipedia.org/wiki/Guimarães). The following function encode all non-ascii chars (e.g. http://pt.wikipedia.org/wiki/Guimar%C3%A3es) before calling filter_var().
Hope this helps someone.
<?php
function validate_url($url) ...
Why does HTML5 form-validation allow emails without a dot?
...s a valid email address (eg localhost is a valid domain). See http://en.wikipedia.org/wiki/Email_address#Examples
Also, keep in mind that you should always do the input validation in server. The client side validation should be only for giving feedback to the user and not be relied on, since it can...
Are HTTP cookies port specific?
...rowsers to use.
The better approach is to get 2 domain names for the same IP and not relying on port numbers for cookies.
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