sudo nano /etc/lightdm/lightdm.confMake sure these two pieces are set/unset:
greet-hide-users=false
...
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| const randLetter = (start = "A", end = "Z") => String.fromCharCode( | |
| Math.floor(Math.random() * (end.charCodeAt(0) - start.charCodeAt(0) + 1)) + start.charCodeAt(0) | |
| ) | |
| randLetter() // "F" | |
| randLetter('a', 'd') // "d" |
kyle-west
/ RaspberryPi.init.md
Last active
April 2, 2023 19:47
Set up RaspberryPi for first time. These are all the steps I take to initialize my Pi the way I like it. It's opinionated. Use it if you want, at your own risk. I have it public so that I can find it without login.
kyle-west
/ rotate-one-dimensional-array.js
Last active
November 5, 2022 13:37
Rotate (right or left) a 2D matrix implemented as a 1D array. Also it should be noted that this is called "transpose" in the math world.
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| // You can adjust these params to suit your actual dimensions | |
| const width = 10; | |
| const height = 10; | |
| const idx = (y, x) => y * height + x | |
| // GIVEN: | |
| // const matrix1D = [0,1,2,3, /* ... */, 98,99] | |
| // const matrix2D = [ | |
| // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], |
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| import { useEffect, useState } from 'react' | |
| const _logEntries = new Set() | |
| function log (...args) { | |
| const entry = { args, id: performance.now() } | |
| _logEntries.add(entry) | |
| window.dispatchEvent(new CustomEvent('custom-log', { detail: entry })) | |
| } |
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| window.make = (type, { children = [], ...props } = {}, attrs = {}) => { | |
| let elem = document.createElement(type) | |
| Object.assign(elem, props) | |
| if (children instanceof Array) { | |
| children.forEach(child => elem.appendChild(child)) | |
| } else if (children instanceof Node) { | |
| elem.appendChild(children) | |
| } else { | |
| elem.innerText = children | |
| } |
kyle-west
/ secret-santa.js
Last active
December 7, 2023 17:04
Classic Secret Santa Problem in 4 lines. Guarantees mathematically that no one will give to themselves and no two will give to each other.
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| function secretSanta(...names) { | |
| const randomized = [...names].sort(() => Math.random() - Math.random()); | |
| const derrangement = [...randomized] | |
| derrangement.unshift(derrangement.pop()) // shifting ensures a derrangement of the randomized list | |
| return Object.fromEntries(randomized.map((name, idx) => [name, derrangement[idx]])) | |
| } | |
| secretSanta('Alice', 'Bob', 'Carter', 'David', 'Emily') | |
| // { Carter: 'Emily', Bob: 'Carter', David: 'Bob', Alice: 'David', Emily: 'Alice' } |
kyle-west
/ useImperativeHandle_to_sync_refs.js
Last active
March 4, 2025 23:48
This is how I like to use useImperativeHandle to "sync" or compose refs in React
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| import React, { useImperativeHandle, useRef, forwardRef, useCallback, useEffect } from 'react' | |
| export const Component = forwardRef(({ callbackRef }, externalRef) => { | |
| const internalRef = useRef() | |
| // use imperative handle lets you "sync" any number of external refs with the value of the internalRef | |
| useImperativeHandle(externalRef, () => internalRef.current) | |
| useImperativeHandle(callbackRef, () => internalRef.current) | |
| useEffect(() => { |
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| #!/bin/bash | |
| ########################################################################### | |
| # USAGE Example: | |
| # lang-cp from_dir from_file_prefix to_dir key1 key2 key3@KEY_3_NEW_NAME key4 | |
| ########################################################################### | |
| from_list=$(find $1 | grep "$2_.*json") | |
| echo "Copying from $2..." | |
| for f in $from_list; do | |
| lang=$(echo $f | cut -d '_' -f 2 | cut -d '.' -f 1) | |
| to_lang=${lang//-/_} |
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| #!/bin/bash | |
| url='https://services1.arcgis.com/0MSEUqKaxRlEPj5g/arcgis/rest/services/ncov_cases/FeatureServer/1/query?f=json&where=(Confirmed%20%3E%200)%20AND%20(Country_Region%3D%27US%27)&returnGeometry=false&spatialRel=esriSpatialRelIntersects&outFields=*&orderByFields=Confirmed%20desc%2CCountry_Region%20asc%2CProvince_State%20asc&outSR=102100&resultOffset=0&resultRecordCount=250&cacheHint=true' | |
| __getStats () { | |
| json <(curl -s "$url") " | |
| const data = \$.features.filter(x => x && x.attributes && x.attributes.Province_State && x.attributes.Province_State.includes && x.attributes.Province_State.includes('$1')) | |
| const { Confirmed, Deaths, Recovered } = (data && data[0] && data[0].attributes) || {}; | |
| Confirmed && console.log('Confirmed: ' + Confirmed, 'Recovered: ' + Recovered, 'Deaths: ' + Deaths); | |
| !Confirmed && console.log('No Data Found on $1') |
kyle-west
/ co-authored
Created
November 27, 2019 16:13
Append a commit message with a "Co-authored-by" message with just a GitHub username
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