Friday, April 28, 2023

Show HN: Codeium-Chrome: Free open-source AI autocomplete Chrome extension https://ift.tt/eqOxBZL

Show HN: Codeium-Chrome: Free open-source AI autocomplete Chrome extension https://ift.tt/U5Sdv1C April 28, 2023 at 02:14AM

Show HN: A Bel compiler to Emacs Lisp bytecode https://ift.tt/mGiKdWE

Show HN: A Bel compiler to Emacs Lisp bytecode In his classic Lisp in Small Pieces, Christian Queinnec actually suggested this project: compiling Scheme to Emacs Lisp byte code. I took up the challenge with Bel instead of Scheme. Much of the code actually comes from the book but adapted to the problem at hand. https://ift.tt/fwAGbe1 April 28, 2023 at 01:23AM

Thursday, April 27, 2023

Show HN: Web app turns your text into p5js (graphics) code using GPT https://ift.tt/jSTDPBl

Show HN: Web app turns your text into p5js (graphics) code using GPT Text → GPT → p5 | An app that turns your text prompt into p5js code (computer graphics) using OpenAI's GPT and displays it. Under the hood: Nextjs, React, CodeMirror, p5js I got into programming through arduino and processing. I've always thought about how to lower the barriers for people to start programming. With GPT, we can now turn plain text into code, allowing people to start coding without knowing code. OpenAI APIs don't come cheap! If you like the project, consider sponsoring access for others here: https://ift.tt/McKSIsL Cheers! https://ift.tt/z4KNa8x April 27, 2023 at 08:58AM

Show HN: I built an online programming language https://ift.tt/o960rXc

Show HN: I built an online programming language https://ift.tt/H6mtyYp April 27, 2023 at 06:08AM

Track Work Through the Years

Track Work Through the Years
By Jeremy Menzies

San Francisco’s unique rail system brings together 150-year-old cable cars, historic electric streetcars of all shapes and sizes and modern light rail vehicles.  

Many trades across the SFMTA play a critical role in keeping the system moving. This month we look back in time at the work of one such group, the Track Department. While the lines and technologies of SF’s street railway have changed over the years, some of the base-level work, tools and skills needed to maintain our tracks are the same today as they were over 100 years ago. 

A decade before Muni was founded, the United Railroads Company (URR) dominated San Francisco’s transit system. URR owned and operated nearly 400 miles of street and cable car track all over the city. To keep this network in service, their track department was fully equipped to handle any possible construction or repair job. 

Black and white photo of group of people moving section of tracks with cranes

All hands were on deck for this job outside the Ferry Building in 1912. Here, two special work streetcars equipped with cranes lift an entire section of track in one piece. 

The Municipal Railway was built in 1912 and expanded over the next 16 years to include multiple lines and two dedicated tunnels. The city relied on its own team to maintain this system on a daily basis.  

Following World War II, many streetcar lines were converted to bus routes, but Muni retained the J, K, L, M, and N streetcar lines. With those core lines still in service, the work of the Track Dept. continued. 

Black and white photo of two people working on tracks. One holds a rail spike while the other strikes it with a large hammer

Taken on January 31, 1947, this photo shows Muni track workers Pat Kellerher and Con Maloney at Division and Bryant Streets.

In the 1970s, construction of the Market Street Subway transformed the city’s streetcar lines into the Muni Metro system. Miles of tracks were rebuilt to handle light rail vehicle (LRV) traffic, and an automatic train control system was introduced for subway operations.

Group of people working on tracks, one pushes a rail while the other lifts a tie into place

In this 1977 shot, a crew replaces K Line tracks on Ocean Avenue just outside Lick-Wilmerding High School.

Today the SFMTA Track Department is primarily responsible for maintaining and repairing our rail infrastructure. Outside of this, they take on other jobs moving cable cars to and from the cable car carpentry shop, hauling heavy equipment in the subway, and supporting the work of the teams that maintain and repair our stations. With the skilled labor, know-how, and equipment to do a variety of heavy jobs, the department plays a critical role in keeping Muni moving.

Photo of group of people lifting rail with a jack and pry bars

Whether it’s 1903 or 2023, track work is a team effort. This photo was taken during the March 2023 Fix-It Week when the Track team replaced sections of rail in the Van Ness Crossover.



Published April 27, 2023 at 03:53AM
https://ift.tt/ROZXtWS

Show HN: CheekyKeys – A Face-Controlled Keyboard https://ift.tt/7OFdEhl

Show HN: CheekyKeys – A Face-Controlled Keyboard https://ift.tt/XFkBL86 April 25, 2023 at 05:27PM

Show HN: Crawling Twitter for AI service ideas https://ift.tt/gI5jZzx

Show HN: Crawling Twitter for AI service ideas I've recently updated this site to include Tweets by people who are looking for AI to help them do things. It's a fun read. https://ift.tt/goWEz3c April 27, 2023 at 01:33AM

Show HN: Configurable Open Source Audio Spectrum Analyzer https://ift.tt/0aqOkyC

Show HN: Configurable Open Source Audio Spectrum Analyzer Hi, I’ve developed an open-source app for practicing basic skills in digital signa...