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What do {curly braces} around javascript variable name mean [duplicate]
EDIT
After looking at JSHint I found this ' destructuring expression' is available in ES6 (use esnext option) or Mozilla JS extensions (use moz) and this however after reading it I still don't understand why it is used
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App Inventor 2 报错：Error 908: The permission RECORD_AUDIO has been d...
报错截图如下：
原因；Screen中请求“声音”权限后，弹出权限请求对话框，选择了拒绝导致的。
此时的麦克风权限是禁止的：
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打开App的设置，重新赋予麦克风的权限后，就ok了。
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 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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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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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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jQuery Validation plugin: disable validation for specified submit buttons
I have a form with multiple fields that I'm validating (some with methods added for custom validation) with Jörn Zaeffere's excellent jQuery Validation plugin. How do you circumvent validation with specified submit controls (in other words, fire validation with some submit inputs, but do not fire v...
Tablet or Phone - Android
... way to check if the user is using a tablet or a phone?
I've got problems with my tilt function and my new tablet (Transformer)
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In node.JS how can I get the path of a module I have loaded via require that is *not* mine (i.e. in
...file subordinate to that module (so I can subclass a Constructor method in it). I can't (well, don't want to) modify the module's code, so don't have a place to extract its __dirname.
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