ajmas’s gists

ajmas / SI Order of Magnitude.js

Last active December 3, 2015 21:53

Javascript code to an SI 'order of magnitude' prefix to a displayed value. For example, given 1000 and 'Hz', you will get 1kHz. For decimal number less than 1, big.js is needed to avoid errors. Note, I looked at using a mathematical approach to get the index, but it worked out to be about the same speed, so I opted for readability

	//ref: https://en.wikipedia.org/wiki/Metric_prefix

	function valueToMagnitude(value, unit, fixedPlaces) {
	var unitExponents = [
	[0,''],
	[3,'k'],
	[6,'M'],
	[9,'G'],
	[12,'T'],
	[15,'P'],

ajmas / snapSVG rainbow gradient.js

Created December 24, 2015 05:20

Drawing a rainbow gradient with snapSVG

	snap = Snap('#mySVG');
	gradient = snap.gradient('l(0, 0, 1, 0)red-orange-yellow-green-blue-indigo-violet');
	snap.rect(0,0,200,200).attr({
	fill: gradient
	});

ajmas / healthcheck.sh

Last active January 6, 2016 02:56

Script to do both IPv4 and IPv6 host health checks, also supporting hosts that only have one address class

	#!/bin/ksh

	hostname="$1"
	url_protocol="https://"
	url_path="/cbace7c0fbe7ffad8af83f61a550dcef/xxxxx_nvwwcsKpsN1qajmbto1_500.jpg"

	## TODO support CNAMES properly - it throws things off

	###
	### IPv4 Health Check

ajmas / polar2cartesian.java

Last active January 20, 2016 23:18

Takes a panoramic image that is in a 'fisheye' view and unwraps it. See http://terra-azure.org/?loc=articles/programming/java/polar2cartesian for an explanation

	package ajmas74.experimental.graphics2d;

	import java.awt.Image;
	import java.awt.image.BufferedImage;
	import java.awt.image.ColorModel;
	import java.awt.image.DataBuffer;
	import java.awt.image.DataBufferInt;
	import java.awt.image.DirectColorModel;
	import java.awt.image.PixelGrabber;
	import java.awt.image.Raster;

ajmas / IPv6Utils.js

Last active March 30, 2016 19:09

Some IPv6 utility functions I put together, improvements appreciated

	var ipv4Regex = /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/;

	function expandIPv6(ipv6ColonNotation) {
	var pad = "0000"
	var count = (ipv6ColonNotation.match(/:/g)\|\| []).length;
	if (count == 0 \|\| count > 7) {
	// too few or too many colons
	return "err";
	}

ajmas / CoordinateParser.js

Last active March 31, 2016 21:43

Parsing text and producing a geo coordinate

	CoordinateParser = {

	convertDegMinSecToDecDeg: function (deg, min, sec, direction) {
	var value;

	if (min === undefined) { min = 0; }
	if (sec === undefined) { sec = 0; }

	deg = parseFloat(deg);
	min = parseFloat(min);

ajmas / countryNameForCoord.js

Created April 4, 2016 21:03

	// depends on turf and having a copy of the countries.gejson file for the value of the countryOutlines
	// see: https://github.com/johan/world.geo.json as one source

	findCountryName (latlon) {
	var features, i, j, poly;
	var point1 = turf.point([latlon[1], latlon[0]]);

	if (this.countryOutlines) {
	features = this.countryOutlines.features;
	for (i=0; i<features.length; i++) {

ajmas / download-from-google-drive.js

Last active January 4, 2017 19:58

Downloads a directory structure from Google Drive. Also handles exporting of the Google Docs.

	const fs = require('fs-extra');
	const google = require('googleapis');
	const OAuth2 = google.auth.OAuth2;
	const key = require('./key.json');

	var baseFolder = 'base';

	function downloadFile(file, path) {
	setTimeout(function () {
	var filePath = path.concat(file.name).join('/');

ajmas / web-sensor-proxy.js

Last active January 21, 2017 17:55

	/**
	* Creates an HTTP server to allow to read the sensor data via
	* HTTP. Improvements could include caching the data, to avoid
	* the sensor being hit too frequently.
	*
	* Not tested in-situ.
	*/
	const express = require('express');
	const app = express();
	const net = require('net');

ajmas / confgurable-password-checker.js

Last active February 2, 2017 18:54

Configurable Password Checker

	// This version work on simply checking something that fails a rule, though
	// it may be useful to check based on estimated password strength. For this
	// each function would return a value indicating strength. This value could
	// be positive or negative. For example, a string longer than 16 characters
	// could get a rating of +5, but being digit only get a -5. Other methods
	// could simply return 0/+1.

	var ruleFunctions = {
	duplicateChars: function(password, min) {
	var prevChar, i;

Andre-John Mas ajmas