If you are tabbing through a page and you seem to suddenly lose “focus”, that is, you are unable to determine which element has the focus currently, you can type the following in the console and tab back and forth. This code will print the the currently active element to the console: document.addEventListener(‘keyup’, function(){console.log(document.activeElement)}) Continue reading

Pig Latin takes the first consonant (or consonant cluster) of an English word, moves it to the end of the word and suffixes an “ay”. If a word begins with a vowel you just add “way” to the end. function translatePigLatin(str) { var firstVowelIndex =0; while(str.charCodeAt(firstVowelIndex)!=97 && str.charCodeAt(firstVowelIndex)!=101 && str.charCodeAt(firstVowelIndex)!=105 && str.charCodeAt(firstVowelIndex)!=111 && str.charCodeAt(firstVowelIndex)!=117 && str.charCodeAt(firstVowelIndex)!=65 Continue reading

  function convertToRoman(num) { var romanNumberMap = { 1: “I”, 2: “II”, 3: “III”, 4: “IV”, 5: “V”, 6: “VI”, 7: “VII”, 8: “VIII”, 9: “IX”, 10: “X”, 20: “XX”, 30: “XXX”, 40: “XL”, 50: “L”, 60: “LX”, 70: “LXX”, 80: “LXXX”, 90: “XC”, 100: “C”, 200: “CC”, 300: “CCC”, 400: “CD”, 500: “D”, 600: Continue reading

Remove all elements from the initial array that are of the same value as the arguments: function destroyer(arr) { for(var j=1; j<arguments.length; j++){ arr = arr.filter(checkVal, arguments[j]); } return arr; } function checkVal(value){ return (value != this); } destroyer([1, 2, 3, 1, 2, 3], 2, 3) should return [1, 1]. destroyer([1, 2, 3, 5, 1, Continue reading

Javascript has two separate functions to test whether the value being tested is a Number or not. isNaN() The first one is a global isNan() function, which strictly tests whether the test value is a Number or not. So if you pass a string to this function, it will return true. For example, the following Continue reading

Check String for Palindrome: function palindrome(str) { var result = true; var newStr=”; for(var i=0;i<str.length;i++){ if(/[a-zA-Z0-9]/gi.test(str.charAt(i))){ newStr+= str.charAt(i); } } var revStr=”; for(var j=0;j<newStr.length; j++){ if(newStr.charAt(j).toLowerCase() != newStr.charAt(newStr.length-j-1).toLowerCase()){ result = false; } } return result; } Find the Longest Word in a String: function findLongestWord(str) { var arrStr = str.split(‘ ‘); var maxLength=0; for(var i=0;i<arrStr.length;i++){ Continue reading