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Understanding colors on Android (six characters)
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Hex Opacity Values
100% — FF
95% — F2
90% — E6
85% — D9
80% — CC
75% — BF
70% — B3
65% — A6
60% — 99
55% — 8C
50% — 80
45% — 73
40% — 66
35% — 59
30% — 4D
25% — 40
20% — 33
15% — 26
10% — 1A
5% — 0D
0% — 00
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Test whether a glob has any matches in bash
...e are specified by POSIX), and it's faster than ls -d glob* (the previous accepted answer) becasue it stops when it reaches the first match.
– Ken Bloom
Nov 24 '10 at 14:54
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App Inventor 2 字典 vs 列表：同样存数据，性能差了10倍？ - App应用开发 ...
...做 App 开发时，你可能会遇到这样一个场景：要存储一组学生信息，包含姓名、年龄、班级，然后需要快速根据姓名查到对应的班级。用列表也能实现，用字典也能实现——那到底该用哪个？<br><br>今天我们就用<b>对比评测</b>的...
INotifyPropertyChanged vs. DependencyProperty in ViewModel
...hCode() methods
A DependencyObject has thread affinity – it can only be accessed
on the thread on which it was
created
I prefer the POCO approach. A base class for PresentationModel (aka ViewModel) which implements INotifyPropertyChanged interface can be found here: http://compositeextensions.co...
How to position one element relative to another with jQuery?
...rent,
var pos = $(this).position();
// .outerWidth() takes into account border and padding.
var width = $(this).outerWidth();
//show the menu directly over the placeholder
$("#menu").css({
position: "absolute",
top: pos.top + "px",
left: (pos.left + wid...
Center image horizontally within a div
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margin:auto;
}
Here's my solution in: http://jsfiddle.net/marvo/3k3CC/2/
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What is the iBeacon Bluetooth Profile
...52 ab 8d 38 a5
This packet can be broken down as follows:
d6 be 89 8e # Access address for advertising data (this is always the same fixed value)
40 # Advertising Channel PDU Header byte 0. Contains: (type = 0), (tx add = 1), (rx add = 0)
24 # Advertising Channel PDU Header byte 1. Contains: (l...
MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...TS端口。三、MQTT发明人介绍Andrew Stanford-Clark拥有东英吉利大学计算机研究和数学学士学位，后来又获得了并行计算方向的博士学位。他于1991年加入IBM的“通信软件”小组。斯坦福 - 克拉克在IBM内部担任过多个职位，主要负责并...
Catch Ctrl-C in C
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@Derrick Agree, int main is a proper thing, but gcc and other compilers compile this to a correctly running programs since 1990's. Explained pretty well here: eskimo.com/~scs/readings/voidmain.960823.html - it's basically a "feature", I take it like that.
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Error 908: Permission Receive SMS - #5 by Taifun - MIT App Inventor Help - MIT App Inventor Community
...y: #222222;
--secondary: #ffffff;
--tertiary: #0088cc;
--quaternary: #e45735;
--highlight: #ffff4d;
--success: #009900;
}
}
/* then deal with dark scheme */
@media (prefers-color-scheme: dark) {
...