Algorithm : Find a sentence is an pangram.

A pangram is a sentence that uses every letter in alphabet at least once. There is a quite popular programming problem to find a given sentence is a pangram or not.

This is an another solution for that problem with JavaScript. Feel free to add a comment if you have any questions or a better, optimized solution.

function isPangram(sentence) {
 var found = [], result = true ; 
 for (var i = 0; i < 26; i++) { 
  found.push(false); 
 } 
 for (var i = 0; i < sentence.length; i++) { 
  var code = sentence.charCodeAt(i); 
  if ('A'.charCodeAt(0) <= code && code <= 'Z'.charCodeAt(0)) { 
   code += 'a'.charCodeAt(0) - 'A'.charCodeAt(0); 
  } 
  if ('a'.charCodeAt(0) <= code && code <= 'z'.charCodeAt(0)) { 
   found[code - 'a'.charCodeAt(0)] = true; 
  } 
 } 
 for (var i = 0; i < 26; i++) { 
  if (!found[i]) { 
   result = false; 
  } 
 } 
 return result; 
}