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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
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BLE是低功耗蓝牙的英文缩写（Bluetooth Low Energy），是蓝牙4.0版本起开始支持的新的、低功耗版本的蓝牙技术规范。蓝牙技术联盟（Bluetooth SIG）在2010年发布了跨时代的蓝牙4.0，它并不是蓝牙3.0的简单升级版本，而是全新的技术架...
Determine the number of NA values in a column
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14 Answers
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How to set .net Framework 4.5 version in IIS 7 application pool
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There is no 4.5 application pool. You can use any 4.5 application in 4.0 app pool. The .NET 4.5 is "just" an in-place-update not a major new version.
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Using Node.JS, how do I read a JSON file into (server) memory?
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1248
Sync:
var fs = require('fs');
var obj = JSON.parse(fs.readFileSync('file', 'utf8'));
Async:
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Exception 'open failed: EACCES (Permission denied)' on Android
...nswered Mar 28 '12 at 12:33
user462990user462990
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mysql_config not found when installing mysqldb python interface
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34 Answers
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Differences in boolean operators: & vs && and | vs ||
...e are the bitwise AND and bitwise OR operators.
int a = 6; // 110
int b = 4; // 100
// Bitwise AND
int c = a & b;
// 110
// & 100
// -----
// 100
// Bitwise OR
int d = a | b;
// 110
// | 100
// -----
// 110
System.out.println(c); // 4
System.out.println(d); // 6
Thanks to...
Remove all multiple spaces in Javascript and replace with single space [duplicate]
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4 Answers
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Testing whether a value is odd or even
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answered Jun 2 '11 at 7:24
Steve MayneSteve Mayne
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NodeJS / Express: what is “app.use”?
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The app object is instantiated on creation of the Express server. It has a middleware stack that...