clarkmcc’s gists

clarkmcc / device.ts

Last active September 16, 2019 16:18

AWS IoT Device - Connect over port 443

	/**
	* Creates a new instance of the iot.device class that we can connect to and listen on
	* @private
	* @type {*}
	* @memberof Device
	*/
	private _device: any = iot.device({
	keyPath: __dirname + "device.private.key",
	certPath: __dirname + "device.cert.pem",
	caPath: __dirname + "root-CA.crt", // https://www.amazontrust.com/repository/AmazonRootCA1.pem

clarkmcc / mr-test.ts

Created September 16, 2019 21:11

Test New Meter Read Format

	const myMeterRead = new MeterRead({
	'reportDtTm' : null,
	'pageCounts' : {
	'equiv' : {
	'total' : {
	'displayName' : 'Total',
	'value' : 6660
	},
	'totalBlack' : {
	'displayName' : 'Total Black',

clarkmcc / getModuleVersions.ts

Created October 29, 2019 01:41

This method is attached to a server-side inversify service that retrieves a list of executable's depending on the provided parameters. It returns a list of those executables (after parsing them) to the called. This snippet makes use of several string methods (split, pop, replace) as well as array methods (filter, forEach).

	public async getModuleVersions(modulePrefix: string): Promise<any> {
	try {
	let fileExtension: string;
	let moduleLocation: string;

	switch (modulePrefix) {
	case 'module1':
	fileExtension = 'exe';
	moduleLocation = '';
	break;

clarkmcc / util.go

Created January 13, 2020 22:34

Accepts a slice of strings and returns a slice of slices of strings where each child slices's length is the length of the size parameter

	package util

	// Accepts a slice of strings and returns a slice of slices of strings where each child slices's length
	// is the length of the batchSize
	func StringBatch(size int, s []string) [][]string {
	var b [][]string
	for size < len(s) {
	s, b = s[size:], append(b, s[0:size:size])
	}
	b = append(b, s)

clarkmcc / aggregate.go

Created January 13, 2020 22:46

Handy functions for creating MongoDB aggregate pipelines in Go

	package aggregate

	import "go.mongodb.org/mongo-driver/bson"

	type Operation bson.M

	// The Pipe functions similar to the RxJS pipe function
	// (https://rxjs-dev.firebaseapp.com/api/index/function/pipe) in that
	// it accepts a set of functions as parameters. Each function receives
	// as its input, the output of the previous function. The allows you

clarkmcc / startup.go

Last active March 5, 2020 17:53

This package is a dependency installer for Golang. Dependencies can be registered with the startup.Engine, checked, and installed.

	package startup

	import (
	"fmt"
	"log"
	"sync"
	)

	const BufferedChan int = 1
	const FailedToInstallDependency = "failed to install dependency"

clarkmcc / get_arch_windows.go

Created March 5, 2020 17:56

Golang function to determine whether a windows machine is 32 bit or 64 bit.

	func GetArch() (string, *errors.ErrorCode) {
	cmd := exec.Command(
	"wmic",
	"os",
	"get",
	"osarchitecture",
	)

	output, err := cmd.CombinedOutput()
	if err != nil {

clarkmcc / get_arch_darwin.go

Created March 5, 2020 17:58

Golang function to determine whether a MacOS machine is 32 bit or 64 bit

	func GetArch() (string, *errors.ErrorCode) {
	cmd := exec.Command(
	"getconf",
	"LONG_BIT",
	)

	output, err := cmd.CombinedOutput()
	if err != nil {
	log.Printf("error getting arch: %v", err)
	return "", errors.New(errors.UnsupportedArchitecture)

clarkmcc / throttler.go

Last active March 19, 2020 04:36

Throttler implements a leaky bucket request throttling algorithm where the duration between two requests is never less than the MinInterval

	type ThrottleEngine struct {
	// The key to this map represents a unique user being throttled, such as
	// an api key, or some user identification obtained from a header
	MostRecentRequest map[string]time.Time
	MinInterval time.Duration
	M *sync.Mutex
	}

	type HttpHandlerFunc func(http.ResponseWriter, *http.Request)

clarkmcc / byte_counter.go

Last active March 19, 2020 04:52

Used for tracking metadata about a request and dumping it into a data warehouse such as Google BigQuery

	package counter

	import (
	"cloud.google.com/go/civil"
	"context"
	"fmt"
	"gitlab.com/ptmesh/api/pkg/repositories"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"net/http"
	"sync"

Clark McCauley clarkmcc