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Rest with Express.js nested router
.../6 -> hello item 6 from user 5
var express = require('express');
var app = express();
var userRouter = express.Router();
// you need to set mergeParams: true on the router,
// if you want to access params from the parent router
var itemRouter = express.Router({mergeParams: true});
// you can...
PowerShell: Setting an environment variable for a single command only
... to my PowerShell profile.
function cmd_special()
{
$orig_master = $env:app_master
$env:app_master = 'http://host.example.com'
mycmd $args
$env:app_master = $orig_master
}
So mycmd is some executable that operates differently depending on the value of the environment variable app_master. ...
Xcode gave strange newsstand-error when trying to submit an app
finaly everything works fine and I want to submit my first app the the Appstore. But when I click submit in Xcode 4.1 I get this strange error message:
...
蓝牙通信接收的信息出现乱码？ - App应用开发 - 清泛IT社区，为创新赋能！
ESP32发送的是英文字符和数字,编译的蓝牙APP接收的是乱码
请问怎么解决以上问题?我们已经解决过类似问题，有一篇深入的乱码的原理及解决思路的文章：https://www.fun123.cn/reference/iot/bluetooth_codec.html
这里仅提供一下思路：
1、...
BLE &APP交互学习教程01——下发指令 - 创客硬件开发 - 清泛IT社区，为创新赋能！
BLE模块性价比高，无需配对就可以连接使用，从本节开始，我们着重来学习使用BLE控制和显示。
1.界面设计
2.逻辑设计
3.APP工程
4.下位机工程
{:8_381:}
如何更改启动屏幕 - App应用开发 - 清泛IT社区，为创新赋能！
...这个新建的login是在screen1后面，如何调换它们的位置，让APP启动时，先从login启动？无法指定启动的屏幕，默认就是特定的Screen1。两种思路：
1、使用“复制屏幕”功能将Screen1复制一份为主屏幕，原来的Screen1改为登录页。
2、S...
【天气API】对接国内免费好用的天气API - App应用开发 - 清泛IT社区，为创新赋能！
...制台，创建应用并获取 API Key：https://console.amap.com/dev/key/app
阅读高德地图天气开发文档：https://lbs.amap.com/api/webservice/guide/api/weatherinfo/
打开 API 接口工具，填入 高德地图天气 API URLhttps://restapi.amap.com/v3/weather/weatherInfo?key=【你的...
What's the point of NSAssert, actually?
..., because: The only thing I recognize is, that if the assertion fails, the app crashes. Is that the reason why to use NSAssert? Or what else is the benefit of it? And is it right to put an NSAssert just above any assumption I make in code, like a function that should never receive a -1 as param but ...
How to use my view helpers in my ActionMailer views?
I want to use the methods I defined in app/helpers/annotations_helper.rb in my ReportMailer views ( app/views/report_mailer/usage_report.text.html.erb ). How do I do this?
...
JSON serialization of Google App Engine models
...success. My project isn't using Django, is there a simple way to serialize App Engine models (google.appengine.ext.db.Model) into JSON or do I need to write my own serializer?
...