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Detecting iOS / Android Operating system
...oid";
}
// iOS detection from: http://stackoverflow.com/a/9039885/177710
if (/iPad|iPhone|iPod/.test(userAgent) && !window.MSStream) {
return "iOS";
}
return "unknown";
}
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Get battery level and state in Android
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10 Answers
10
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How to test multiple variables against a value?
...bout the same comparison for all names here. You are looking for:
if x == 1 or y == 1 or z == 1:
x and y are otherwise evaluated on their own (False if 0, True otherwise).
You can shorten that using a containment test against a tuple:
if 1 in (x, y, z):
or better still:
if 1 in {x, y, z}:
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Why use double indirection? or Why use pointers to pointers?
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18 Answers
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Is there an equivalent of CSS max-width that works in HTML emails?
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+150
Yes, there is a way to emulate max-width using a table, thus giving you both responsive and Outlook-friendly layout. What's more, th...
jQuery to loop through elements with the same class
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15 Answers
15
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What is meant by 'first class object'?
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11 Answers
11
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How to select option in drop down using Capybara
I'm trying to select an item from a drop down menu using Capybara (2.1.0).
9 Answers
9...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
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172
Try this:
$str = preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/', function ($match) {
ret...
App Inventor 2 EV3超声波传感器教程 · App Inventor 2 中文网
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实战案例：避障小车
EV3端准备
常见问题
Q1: 无法连接EV3？
Q2: 超声波读数为0或负数？
Q3: 读取速度慢？
总结
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概述
App Inventor 2提供LEGO MINDSTORMS EV3组件，可以直接通...