| #!/usr/bin/env node | |
| /** | |
| * Module dependencies. | |
| */ | |
| var app = require('../server/app'); | |
| var debug = require('debug')('my-app:server'); | |
| var http = require('http'); |
| """Convert jupyter notebook to sphinx gallery notebook styled examples. | |
| Usage: python ipynb_to_gallery.py <notebook.ipynb> | |
| Dependencies: | |
| pypandoc: install using `pip install pypandoc` | |
| """ | |
| import pypandoc as pdoc | |
| import json |
First, this is not about if in JSX. It's just the simplest example
to talk about (and a lot of people tried to do it at first a long
time ago).
Some react components conditionally render content. When React first
went public, a lot of us coming from handlebars really wanted "if"
syntax. This gist isn't just about If components though, it's about
| // Touch screen library with X Y and Z (pressure) readings as well | |
| // as oversampling to avoid 'bouncing' | |
| // This demo code returns raw readings, public domain | |
| #include <stdint.h> | |
| #include "TouchScreen.h" | |
| #define YP A2 // must be an analog pin, use "An" notation! | |
| #define XM A3 // must be an analog pin, use "An" notation! |
| #include <stdio.h> | |
| #include <Wire.h> // I2C library for I2C LCD | |
| #define USEI2CLCD // 不使用就在前面加 // | |
| #ifdef USEI2CLCD | |
| #define ADDRI2CLCD 0x3C | |
| #endif | |
| #define _SCK 5 | |
| #define _CS 2 | |
| #define _SO 8 | |
| static volatile uint8_t is_tc_open; |
| /* | |
| * Firmata is a generic protocol for communicating with microcontrollers | |
| * from software on a host computer. It is intended to work with | |
| * any host computer software package. | |
| * | |
| * To download a host software package, please clink on the following link | |
| * to open the download page in your default browser. | |
| * | |
| * http://firmata.org/wiki/Download | |
| */ |
| /** MAX6675 Thermocouple Reader Example Code | |
| * | |
| * This is so simple a library would be silly! | |
| * | |
| * 6675 Module ==> Arduino | |
| * CS ==> D10 | |
| * SO ==> D12 | |
| * SCK ==> D13 | |
| * Vcc ==> Vcc (5v OK) | |
| * Gnd ==> Gnd |
Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).
The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int
| import { MongoClient } from 'mongodb'; | |
| import promisify from 'es6-promisify'; | |
| let _connection; | |
| const connect = () => { | |
| if (!process.env.MONGO_CONNECTION_STRING) { | |
| throw new Error(`Environment variable MONGO_CONNECTION_STRING must be set to use API.`); | |
| } |
As a freelancer, I build a lot of web sites. That's a lot of code changes to track. Thankfully, a Git-enabled workflow with proper branching makes short work of project tracking. I can easily see development features in branches as well as a snapshot of the sites' production code. A nice addition to that workflow is that ability to use Git to push updates to any of the various sites I work on while committing changes.