Common JS Utility Functions

js-utilities.js

//MAP A NUMBER FROM ONE RANGE TO ANOTHER:
function map_range(value, low1, high1, low2, high2) {
    return low2 + (high2 - low2) * (value - low1) / (high1 - low1);
}

//RANDOM DECIMAL NUMBER BETWEEN [MIN] and [MAX]:
randomNumber(min, max) {
  return Math.random() * (max - min) + min;
}

//GET A RANDOM INTEGER BETWEEN [MIN] and [MAX]:
function randomIntFromInterval(min, max) { // min and max included 
  return Math.floor(Math.random() * (max - min + 1) + min);
}

//CONVERT ANY STRING TO SLUG
function slugify(str){
 return str.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
      .map(x => x.toLowerCase())
      .join('_');   
}

//TITLE CASE STRING
function titleCase(str) {  return str.toLowerCase().replace(/(^|\s)\S/g,  (firstLetter) => firstLetter.toUpperCase());}