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What's the difference between Perl's backticks, system, and exec?
...ished.
In contrary to system the return value is STDOUT of the command.
qx// is equivalent to backticks.
You can find documentation about it in perlop, because unlike system and execit is an operator.
Other ways
What is missing from the above is a way to execute a command asynchronously.
Th...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
... (SoC) 和可与环境交互的传感器组成：陀螺仪、加速计、磁力计、压力传感器、湿度传感器和温度传感器。 SoC 直接连接到传感器，无需外部微处理器。
使用蓝牙 LE 组件，测试人员能够创建与这两个设备交互的各种应用程序。 ...
使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...示的立体渲染。GvrActivity 还可用于通过 Cardboard 设备上的磁力按钮处理用户交互。
GvrActivity 扩展了常规活动，使用 SensorListener 处理 Android 传感器事件（如头部旋转），并在内部包含 GvrView 组件。
GvrView 是扩展 FrameLayout 的 ViewGro...
Automatic Retina images for web sites
...The only issue with svg is with older browsers.
– jan267
Dec 15 '12 at 9:00
16
And cases where yo...
why windows 7 task scheduler task fails with error 2147942667
...667 to hex: 8007010B
2) Take last 4 digits (010B) and convert to decimal: 267
3) Run: net helpmsg 267
4) Result: "The directory name is invalid."
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What characters can be used for up/down triangle (arrow without stem) for display in HTML?
...LAT SIGN
U+266E ♮ MUSIC NATURAL SIGN
U+266F ♯ MUSIC SHARP SIGN
U+267A ♺ RECYCLING SYMBOL FOR GENERIC MATERIALS
U+267B ♻ BLACK UNIVERSAL RECYCLING SYMBOL
U+267C ♼ RECYCLED PAPER SYMBOL
U+267D ♽ PARTIALLY-RECYCLED PAPER SYMBOL
U+267E ♾ PERMANENT PAPER SIGN
U+267F ...
How to make an inline-block element fill the remainder of the line?
...
See: http://jsfiddle.net/qx32C/36/
.lineContainer {
overflow: hidden; /* clear the float */
border: 1px solid #000
}
.lineContainer div {
height: 20px
}
.left {
width: 100px;
float: left;
border-right: 1px soli...
Simple Vim commands you wish you'd known earlier [closed]
...o spaces :retab
start recording a macro qX (X = key to assign macro to)
stop recording a macro q
playback macro @X (X = key macro was assigned to)
replay previously played macro * @@
auto-complete a word you are t...
What is the maximum length of a URL in different browsers?
.../jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBhQSERIUExQUFRUUFxcXFhQYFBQXGBgYFhkVGBkVFxUXHCYfGBojGRQVHy8gJCcpLCwsFh4xNTAqNSYrLCkBCQoKDgwOGg8PGiokHyQpLDUqKSwsLCksKSwpKSwsLCwpKSkpLCwpLCksKSwpLCkpLCwsLCkpKSwsLCwsLDQsLP/AABEIAM0A9gMBIgACEQEDEQH/xAAcAAACAgMBAQAAAAAAAAAAAAAABQQGAgMHAQj/xABTEAACAAQCBAc...
How do I check for C++11 support?
...swered Jan 8 '16 at 16:38
kurono267kurono267
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