jarsen

Elixir/Phoenix for Python people: what to actually learn

All Elixir programs are composed of 3 things:

• Data — numbers, strings, lists, maps, functions (functions are data), etc.
• Modules — groupings of related functions and data structures
• Processes — how the code is run and where state lives

"They are all interconnected: processes run the code defined in modules that manipulate the data types." >

a-c-m

You are an expert in prompt engineering, specializing in optimizing AI code assistant instructions. Your task is to analyze and improve the instructions for Claude Code. Follow these steps carefully:

1. Analysis Phase: Review the chat history in your context window.

Then, examine the current Claude instructions, commands and config <claude_instructions> /CLAUDE.md /.claude/commands/*

designfrontier

#!/usr/bin/env node

const http = require('https');
const url = process.env.SLACK_URL;

let data;

process.stdin.resume();
process.stdin.setEncoding('utf8');

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

donis

# First we cut the video in how many parts we want

# Step 1. cut the first part of the video and cut it to a separate file
ffmpeg.exe -ss 00:00:00.000 -t 00:02:18.00 -i recording-full.flv -c:v copy -c:a copy recording-full-part1.flv

# Step 2. cut the second part from original video
ffmpeg.exe -ss 00:03:47.000 -i recording-full.flv -c:v copy -c:a copy recording-full-part2.flv

# Step 3. create a file with your cut parts to concat into one video with these contents and name it whatever (i.e. videos.txt):
file 'C:\Path\To\recording-full-part1.flv'

chriszarate

julionc

How to install PhantomJS on Ubuntu

Version: 1.9.8

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update
sudo apt-get install build-essential chrpath libssl-dev libxft-dev

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

antonbabenko

#!/bin/bash
while read LINE; do
  curl -o /dev/null --silent --progress-bar --head --write-out '%{http_code} %{time_starttransfer} %{url_effective}\n' "$LINE" >> urls_result.txt
done < urls.txt