JavaScript tricks

tricks.js

// Get a random number in a specific range
function randomInRange(max, min) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

// Get a random item from an array
function randomFromArray(items) {
  return items[Math.floor(Math.random() * items.length)];
}

// trim function for string
function myTrim(str) {
  return str.replace(/^s+|s+$/g, "");
}

// An HTML escaper function
function escapeHTML(text) {  
  var replacements= {"<": "&lt;", ">": "&gt;","&": "&amp;", """: "&quot;"};                      
  return text.replace(/[<>&"]/g, function(character) {  
    return replacements[character];
  }); 
}