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#!/usr/bin/env php
<?php

define('PID_PATH', '/tmp/myapp.pid');

define ('PID', (int) file_get_contents(PID_PATH));

if (empty($argv[1])) {
    echo <<<INFO

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function findShortestPath(coordinates, populationSize, maxIterations) {
  // Initialize the positions of slime mould
  const positions = [];
  let bestFitness = Number.MAX_VALUE;
  let bestPosition;

  for (let i = 0; i < populationSize; i++) {
    const position = coordinates.slice(); // Make a copy of the coordinates array
    positions.push(position);
  }

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Research Methodology: The Role of a Software Freestyle Engineer in Modern IT

Introduction

This document provides an in-depth description of the research design, data collection methods, interview protocols, and case study procedures employed in the study titled "The Role of a Software Freestyle Engineer in Modern IT." It offers a comprehensive overview of the methodology used in the research, serving as a reference for researchers interested in replicating or expanding upon the study.

Research Design

The research followed a mixed-methods approach, combining qualitative and quantitative techniques to gather comprehensive insights into the role of a Software Freestyle Engineer. This approach allowed for a deeper understanding of the subject matter and the ability to triangulate findings from different data sources.

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function harvesine(pta, ptb) {
  
  const [lat1, lon1] = pta.split(',')
  const [lat2, lon2] = ptb.split(',')
  
  // convert to radians
  const rad1 = (lat1 * Math.PI) / 180;
  const rad2 = (lat2 * Math.PI) / 180;
  const dLat = ((lat2 - lat1) * Math.PI) / 180;
  const dLon = ((lon2 - lon1) * Math.PI) / 180;

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const xlsx = require('xlsx');
const path = require('path');

const exportExcel = (data, workSheetColumnNames, workSheetName, filePath) => {
    const workBook = xlsx.utils.book_new();
    const workSheetData = [
        workSheetColumnNames,
        ... data
    ];
    const workSheet = xlsx.utils.aoa_to_sheet(workSheetData);

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Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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Some notes about conversion to number in javascript

javascript has lots of methods to convert any value to number

• all methods could be divided into 2 groups: string and native methods
  • String methods are parseInt and parseFloat
  • Native mathods are Number and Math methods

all native methods behave the same way, sometimes with additional transform

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NSSM cheatsheat

• Create a new service
• List parameters for a service
• Set a parameter for a service
• Parameter list

Create a new service

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const createLogger = (backgroundColor, color) => {
  const logger = (message, ...args) => {
    if (logger.enabled === false) {
      return;
    }

    console.groupCollapsed(
      `%c${message}`,
      `background-color: ${backgroundColor}; color: ${color}; padding: 2px 4px;`,
      ...args

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//Regular Expressions List

//Short Tutorial 

\	// the escape character - used to find an instance of a metacharacter like a period, brackets, etc.
.	// match any character except newline
x	// match any instance of x
^x	// match any character except x
[x]	// match any instance of x in the bracketed range - [abxyz] will match any instance of a, b, x, y, or z
|	// an OR operator - [x|y] will match an instance of x or y