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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
文章源自：http://doc.iotxx.com/index.php?title=BLE技术揭秘
BLE技术揭秘
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...
How much space can your BitBucket account have?
...eUploader: {
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Java - JPA - @Version annotation
...eUploader: {
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Rails: FATAL - Peer authentication failed for user (PG::Error)
... service
sudo service postgresql restart
I write steps on my blog also
http://tarungarg402.blogspot.in/2014/10/set-up-postgresql-on-ubuntu.html
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What are the “standard unambiguous date” formats for string-to-date conversion in R?
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git: Apply changes introduced by commit in one repo to another repo
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I wrote a small script for applying the diff output of repo diff
https://github.com/raghakh/android-dev-scripts/commit/a57dcba727d271bf2116f981392b0dcbb22734d0
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Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
...Gmail settings in Forwarding IMAP/POP tab.
Allow less secure apps: ON from https://myaccount.google.com/lesssecureapps
You're now good to go. :)
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How does a Java HashMap handle different objects with the same hash code?
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You can find excellent information at http://javarevisited.blogspot.com/2011/02/how-hashmap-works-in-java.html
To Summarize:
HashMap works on the principle of hashing
put(key, value): HashMap stores both key and value object as Map.Entry. Hashmap applies hash...
Fast way of counting non-zero bits in positive integer
...on of the Hamming weight (if you don't mind using about 64KB of memory).
#http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetTable
POPCOUNT_TABLE16 = [0] * 2**16
for index in range(len(POPCOUNT_TABLE16)):
POPCOUNT_TABLE16[index] = (index & 1) + POPCOUNT_TABLE16[index >> 1...
Including Google Web Fonts link or import?
...de in your <head></head> tag:
<link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin>
<link href="https://fonts.googleapis.com/css?family=Roboto&display=swap" rel="stylesheet">
sha...