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使用位置传感器 · App Inventor 2 中文网
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This tutorial was developed by Professor David Wolber at The University of San Francisco.
The LocationSensor component can determine the phone’s latitude and longitude as well as a street address. You can use it to share your location with others, record “breadcrumbs” on a journey or tre...
ClickTools 拓展：为布局、标签等没有点击事件的组件添加点击事件 - App In...
...red component
Use this event to set blocks of component click.
error ~ It returns the error if something went wrong
Use this event to do something after error occured
[color=var(--primary-high-or-secondary-low)][backcolor=var(--blend-primary-secondary-5)]
Techno_Vedang:
component ~ compon...
How to iterate for loop in reverse order in swift?
... until I changed the first parameter of for loop to be the highest value. (iterated in descending order)
14 Answers
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How to concatenate two MP4 files using FFmpeg?
...s file. The files are h264 and aac encoded and I'm hoping to keep the quality the same or as close to original as possible.
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How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
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It appears to me that the simplest way to do this is
import datetime
epoch = datetime.datetime.utcfromtimestamp(0)
def unix_time_millis(dt):
return (dt - epoch).total_seconds() * 1000.0
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Connecting overloaded signals and slots in Qt 5
I'm having trouble getting to grips with the new signal/slot syntax (using pointer to member function) in Qt 5, as described in New Signal Slot Syntax . I tried changing this:
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MongoDB/Mongoose querying at a specific date?
Is it possible to query for a specific date ?
6 Answers
6
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Rotating videos with FFmpeg
I have been trying to figure out how to rotate videos with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (excellent library, btw) but I'm stuck on FFmpeg now.
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How do I set/unset a cookie with jQuery?
...ding/manipulation, so don't use the original answer below.
Go to https://github.com/js-cookie/js-cookie instead, and use the library there that doesn't depend on jQuery.
Basic examples:
// Set a cookie
Cookies.set('name', 'value');
// Read the cookie
Cookies.get('name') => // => 'value'
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InputStream from a URL
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Use java.net.URL#openStream() with a proper URL (including the protocol!). E.g.
InputStream input = new URL("http://www.somewebsite.com/a.txt").openStream();
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See also:
Using java.net.URLConnection to fire and handle HTTP requests
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