jkeefe

BLUETOOTH SNIFFER

Working to sniff Bluetooth Low Energy with the adafruit sniffer

For more information, see this blog post

Going the python route, as described here

before installing pySerial, did ...

jkeefe

// based on: https://stackoverflow.com/a/67136959

const niceRounder = (number) => {

    let near = 1
    if (number > 100) near = 10
    if (number > 1000) near = 100
    if (number > 10000) near = 1000

    if (number % near === 0) return number;

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# example: get rid of large `.tif` and `.nc` files in gis/tmp
# from https://www.geeksforgeeks.org/how-to-remove-a-large-file-from-commit-history-in-git/

git filter-branch --force --index-filter \
'git rm --cached --ignore-unmatch gis/tmp/*.tif' \
--prune-empty --tag-name-filter cat -- --all

git filter-branch --force --index-filter \
'git rm --cached --ignore-unmatch gis/tmp/*.nc' \
--prune-empty --tag-name-filter cat -- --all

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// npm install mapshaper --save

import mapshaper from 'mapshaper'

// Example of runCommands: converting a directory of Shapefiles to GeoJSON
mapshaper.runCommands('-i shapefiles/*.shp -o geojson/ format=geojson');

// ----

// Example of applyCommands: processing a json array

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{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListAllMyBuckets"
            ],
            "Resource": "arn:aws:s3:::*"
        },

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const fs = require('fs')
const gm = require('gm').subClass({ imageMagick: '7+' });

WIDTH = 1138
HEIGHT = 50
X = 0
Y = 0

gm('./images/us_at_bottom.png')
    .region(WIDTH, HEIGHT, X, Y)

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[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "GET",
            "HEAD"
        ],
        "AllowedOrigins": [

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// from https://github.com/iamkun/dayjs/issues/1619#issuecomment-1185714859

const round: PluginFunc = (option, dayjsClass) => {
  dayjsClass.prototype.round = function (amount, unit) {
    const mod = this.get(unit as UnitType) % amount;

    if(mod < amount / 2) {
      return this.subtract(mod, unit).startOf(unit);
    }

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// installation:
//  npm install dayjs dayjs-plugin-utc --save
// note: if not already a module, in package.json add "type":"module",

import dayjs from 'dayjs';
import updateLocale from 'dayjs/plugin/updateLocale.js';
import utc from 'dayjs/plugin/utc.js';     
import timezone from 'dayjs/plugin/timezone.js';

// set up the as-of date

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const time_hash = Date.now().toString(36);

// reverse it for more wordiness:
const time_hash2 = Date.now().toString(36).split("").reverse().join("")