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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 do I create an HTML table with a fixed/frozen left column and a scrollable body?
I need a simple solution. I know it's similar to some other questions, like:
25 Answers
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How to wrap async function calls into a sync function in Node.js or Javascript?
Suppose you maintain a library that exposes a function getData . Your users call it to get actual data:
var output = getData();
Under the hood data is saved in a file so you implemented getData using Node.js built-in fs.readFileSync . It's obvious both getData and fs.readFileSync are sy...
Change MySQL default character set to UTF-8 in my.cnf?
...llowing commands in PHP to set the character set to UTF-8 in our application.
18 Answers
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What is meant by “managed” vs “unmanaged” resources in .NET?
...er the control of the garbage collector. For example, if you open a connection to a database server this will use resources on the server (for maintaining the connection) and possibly other non-.net resources on the client machine, if the provider isn't written entirely in managed code.
This is why...
Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
...myurl.com/%@.jpg", self.myJson[indexPath.row][@"movieId"]]];
NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (data) {
UIImage *image = ...
What is the most efficient Java Collections library? [closed]
What is the most efficient Java Collections library?
12 Answers
12
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Git ignore file for Xcode projects
Which files should I include in .gitignore when using Git in conjunction with Xcode ?
20 Answers
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Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...teger, therefore the compiler warning.
See also NSUInteger in the "Foundation Data Types Reference":
When building 32-bit applications, NSUInteger is a 32-bit unsigned
integer. A 64-bit application treats NSUInteger as a 64-bit unsigned
integer.
To fix that compiler warning, you can eithe...
How to make the 'cut' command treat same sequental delimiters as one?
...ay or may not be wanted, but usually isn't), in contrast with the awk solution. The awk solution is also much more readable and less verbose.
– n.caillou
Apr 4 '18 at 23:31
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