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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...践
主题命名规范：
{namespace}/{device_type}/{device_id}/{attribute}/{action}
示例：
home/thermostat/livingroom/temperature/set
office/light/meeting_room/brightness/get
factory/sensor/machine_001/status/online
通配符使用规则：
// 单级通配符匹配
call UrsPahoM...
Enabling HTTPS on express.js
... = require('http');
var https = require('https');
var privateKey = fs.readFileSync('sslcert/server.key', 'utf8');
var certificate = fs.readFileSync('sslcert/server.crt', 'utf8');
var credentials = {key: privateKey, cert: certificate};
var express = require('express');
var app = express();
// your...
Content-Disposition:What are the differences between “inline” and “attachment”?
...n I use one or another I
get a window prompt asking me to
download the file for both of them.
This behavior depends on the browser and the file you are trying to serve. With inline, the browser will try to open the file within the browser.
For example, if you have a PDF file and Firefox/Adob...
How to ignore SVN folders in WinMerge?
...
Try making a Filefilter
WinMerge handles this just fine. You want to create and use a Filter. Under Tools | Filters... | Filefilters, create a new filter or modify an existing one.
It will look like this:
## Ignore Java class and jar fi...
How to set default vim colorscheme
...
Your .vimrc file goes in your $HOME directory. In *nix, cd ~; vim .vimrc. The commands in the .vimrc are the same as you type in ex-mode in vim, only without the leading colon, so colo evening would suffice. Comments in the .vimrc are...
Format file size as MB, GB, etc [duplicate]
I need to display a file size as a string using sensible units.
3 Answers
3
...
Amend a commit that wasn't the previous commit [duplicate]
...
if you have only one file with unstaged changes that you want to commit to an old commit, the easiest way I've found is to 1) copy your file to the desktop or something 2) git stash 3) git rebase -i sha1^ 4) change pick to edit on the old commit ...
load external css file in body tag [duplicate]
usually, external css file loading code is put on header of html.
1 Answer
1
...
What does ~> mean in a gem file [duplicate]
In the gem file for https://github.com/justinfrench/formtastic they have:
1 Answer
1...
Download a working local copy of a webpage [closed]
... etc.
Each link will be changed in one of the two ways:
The links to files that have been downloaded by Wget will be changed to refer
to the file they point to as a relative link.
Example: if the downloaded file /foo/doc.html links to /bar/img.gif, also
downloaded, then the link i...