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中文网（自研/维护）拓展 · App Inventor 2 中文网
... 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 中文网（自研/维护）拓展 ...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...01010101或者10101010序列Access Address
4个字节长度，广播报文接入地址为：0x8E89BED6，数据报文接入地址为：32bits随机数PDU
广播报文（见协议BLUETOOTH SPECIFICATION Version 4.0 [Vol 6] Part B 2.3）
PDU Type：有效载荷内容的类型，通过这一字段...
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
... 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展
...
常用快速产品原型设计工具推荐 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...计以用户为中心的理念会贯穿整个产品。利用交互设计师专业的眼光与经验直接导至该产品的可用性。
简单说，“原型”是在项目前期阶段的重要设计步骤，主要以发现新想法和检验设计为目的，重点在于直观体现产品主要界...
为什么你有10年经验，但成不了专家？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...天赋的足球爱好者，在场上的水平永远比不上一个接受过专业训练的足球运动员（即使他天资平庸）——他们长时间停留在舒适区。
足球爱好者纯粹为了乐趣而踢球，他们享受踢球的过程，他们渴望的是下班后去足球场拔脚...
What is the maximum possible length of a .NET string?
...a string.
The test starts ...now:
s.Length = 1000000000 at 08/05/2019 12:06
Exception of type 'System.OutOfMemoryException' was thrown. at
08/05/2019 12:06. After decimation, the value of Increment is
100000000.
Exception of type 'System.OutOfMemoryException' was thrown. at
...
File input 'accept' attribute - is it useful?
...s-works wdb
application/vnd.ms-works wks
application/vnd.ms-works wps
application/winhlp hlp
application/x-bcpio bcpio
application/x-cdf cdf
application/x-compress z
application/x-compressed tgz
application/x-cpio cpio
application/x-csh csh
application/x-director dcr
application/...
Converting NSString to NSDate (and back again)
...
UPDATE 2019 (Swift 4):
Made a Date extension for that. It uses NSDataDetector instead of NSDateFormatter.
// Just throw at it without any format.
var date: Date? = Date.FromString("02-14-2019 17:05:05")
Pretty enjoyable, it even...
How to round the minute of a datetime object
...little add-on to share. Rounding up, down and rounding to nearest.
update 2019-03-09 = comment Spinxz incorporated; thank you.
update 2019-12-27 = comment Bart incorporated; thank you.
Tested for date_delta of "X hours" or "X minutes" or "X seconds".
import datetime
def round_time(dt=None, date...
How to calculate number of days between two dates
...
This works for me:
const from = '2019-01-01';
const to = '2019-01-08';
Math.abs(
moment(from, 'YYYY-MM-DD')
.startOf('day')
.diff(moment(to, 'YYYY-MM-DD').startOf('day'), 'days')
) + 1
);
...