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为啥React组件export导出不生效? - 更多技术 - 清泛网 - 专注C/C++及内核技术
...无需大括号;导入使用其他类时,需要大括号。主文件 app.js:
import React from 'react';
import ReactDOM from 'react-dom';
import {Hello} from './hello';
ReactDOM.render(
<Hello/>,
document.getElementById('app')
);
Hello 组件来自同一个文件夹中的 hel...
C++ 打开文件,以清空覆盖的方式 - C/C++ - 清泛网 - 专注C/C++及内核技术
... "content...";
打开文件的方式mode常用的值如下:
ios::app: 以追加的方式打开文件
ios::ate: 文件打开后定位到文件尾,ios:app就包含有此属性
ios::binary: 以二进制方式打开文件,缺省的方式是文本方式。...
BLE(五)移动端工具 - 创客硬件开发 - 清泛IT社区,为创新赋能!
...自:https://www.gandalf.site/2018/12/ble.html
0x1 Android手机抓取app蓝牙数据0x11 Android蓝牙HCI日志在部分Android机型为开发人员提供了保存蓝牙日志的选项,即可保存手机向设备发送的数据和设备响应的数据,打开方式如下:
开发者模式...
蓝牙BLE设备使用BLE拓展连不上蓝牙? - 创客硬件开发 - 清泛IT社区,为创新赋能!
...蓝牙?
这里统一说明一下:
一般先用硬件厂商提供的App 或者 nRF Connect App 进行硬件连接和测试,没问题再使用ai2 ble拓展开发。
如果测试没有问题,ai2 蓝牙连接处代码及具体的报错信息截图提供,具体问题具体分析。
MAC地址可以连上,硬件通信时提示无效的UUID? - 创客硬件开发 - 清泛IT社...
...E2:E0:5A:46:86:2F
使用MAC地址连接,一切功能正常。
这个 APP程序 使用透传UUID 还可以控制蓝牙模块的IO 口么?这个 APP程序 使用透传UUID 还可以控制蓝牙模块的IO 口么?透传uuid和io控制的uuid是不一样的,具体清参考:https://bb...
BLE通信数据不能超过20字节? - 创客硬件开发 - 清泛IT社区,为创新赋能!
...使用调用.WriteBytes
After a lot of hours I found the problem in my app.
How I proceeded:
1- At ESP32 code I put this line: BLEDevice::setMTU(192);
2- At app I put the call Request MTU on the .Connected block asking for the same 192 bytes;
In my case, when I have to send a payload < 23...
Run single test from a JUnit class using command-line
I am trying to find an approach that will allow me to run a single test from a JUnit class using only command-line and java.
...
Using the “animated circle” in an ImageView while loading stuff
I am currently using in my application a listview that need maybe one second to be displayed.
6 Answers
...
How do I toggle an ng-show in AngularJS based on a boolean?
...s "overriding" the one I declared in the controller $scope. The problem disappears if I do the toggle via a function of the controller: ng-click="toggleBoolean()". Any idea why?
– antoine
Feb 12 '15 at 0:54
...
What's the difference between Unicode and UTF-8? [duplicate]
... encoding support to provide a range of encodings will automatically and inappropriately describe UTF-16LE as “Unicode”, and UTF-16BE, if provided, as “Unicode big-endian”.
(Other editors that do encodings themselves, like Notepad++, don't have this problem.)
If it makes you feel any bette...
