vicnaum

Translate EVM bytecode into opcodes using pure Regex :)

Demo: https://twitter.com/0x796/status/1608039943582142464

Try here: https://regex101.com/

Use PCRE2 (Perl compatible) Regex flavor.

Search:

yorickdowne

Overview

Syncing an Ethereum node is largely reliant on latency and IOPS, I/O Per Second, of the storage. Budget SSDs will struggle to an extent, and some won't be able to sync at all. IOPS can roughly be used as proxy of / predictor for latency. Measuring latency directly is arguably better.

This document aims to snapshot some known good and known bad models.

The drive lists are ordered by interface and then by capacity and alphabetically by vendor name, not by preference. The lists are not exhaustive at all. @mwpastore linked a filterable spreadsheet in comments that has a far greater variety of drives and their characteristics. Filter it by DRAM yes, NAND Type TLC, Form Factor M.2, and desired capacity.

For size, 4TB is a very conservative choice. The smaller 2TB drive should last an Ethereum full node until at least sometime 2026, with the [pre-merge history expiry](https://hackmd.io/@hBXHLw_9Qq2va4pRt

jreviews

htmx loading states extension

The loading-states extension allows you to easily manage loading states while a request is in flight, including disabling elements, and adding and removing CSS classes.

Using the extension

Add the hx-ext="loading-states" attribute to the body tag or to any parent element containing your htmx attributes.

Add the following class to your stylesheet to make sure elements are hidden by default:

dabit3

import { useState, useEffect } from 'react'
import Web3 from 'web3'

const [account, setAccount] = useState(null)
let [web3, setWeb3] = useState(null)
useEffect(() => {
  checkAccount()
}, [])

// invoke to connect to wallet account

onlurking

Programming as Theory Building

Peter Naur

Peter Naur's classic 1985 essay "Programming as Theory Building" argues that a program is not its source code. A program is a shared mental construct (he uses the word theory) that lives in the minds of the people who work on it. If you lose the people, you lose the program. The code is merely a written representation of the program, and it's lossy, so you can't reconstruct

bbennett36

import pandas as pd
import numpy as np

def test_cutoffs(start_amount, start_price, buy_fee, sell_fee, end_price):
    bought_fee = start_amount*buy_fee
    bought_amt = (start_amount-bought_fee) / start_price
    
    sold = bought_amt*end_price
    sold_fee = sold*sell_fee
    sold = sold-sold_fee

ThomasBurleson

Scenario

We want to build a custom schematic for company Aero that will internally do two things:

• build a new ngrx library using Nx workspace naming conventions
• generate ngrx state-management files; include the *.facade.* files

---

Important: This example is valid ONLY for Nx v6.2.x or higher!

ultrabug

#!/usr/bin/env python3.5

from time import time

import dask.dataframe as dd
import pandas as pd

from cassandra.cluster import Cluster
from cassandra.concurrent import execute_concurrent
from cassandra.policies import ConstantReconnectionPolicy

ThomasBurleson

NgRx State Management with TicketFacade

Facades are a programming pattern in which a simpler public interface is provided to mask a composition of internal, more-complex, component usages.

When writing a lot of NgRx code - as many enterprises do - developers quickly accumulate large collections of actions and selectors classes. These classes are used to dispatch and query [respectively] the NgRx Store.

Using a Facade - to wrap and blackbox NgRx - simplifies accessing and modifying your NgRx state by masking internal all interactions with the Store, actions, reducers, selectors, and effects.

For more introduction, see Better State Management with Ngrx Facades

cmacdonnacha

$white: #ffffff;
$black: #000000;
$red50: #ffebee;
$red100: #ffcdd2;
$red200: #ef9a9a;
$red300: #e57373;
$red400: #ef5350;
$red500: #f44336;
$red600: #e53935;
$red700: #d32f2f;