The number of characters and occurrences of the most occurrences in a string are judged in JS

　　

1<script type="Text/javascript">2         varstr ='Qwertyuilo.,mnbvcsarrrrrrrrtyuiop;l,mhgfdqrtyuio;. Cvxsrtyiuo';3         varJSON = {};4         //Traverse str to disassemble each of these characters to take out the value of a character and the number of occurrences as a JSON kv5          for(vari =0; i < str.length; i++) {6             //determine if there is a value for the current STR in the JSON7             if(!Json[str.charat (i)]) {8                 //Add the current value to the JSON if it does not exist9Json[str.charat (i)] =1;Ten}Else { One                 //else, the index value of the current value in the array is the + +; AJson[str.charat (i)]++; -             } -         } the             //Store The most occurrences of the value and number of times -             varNumber ="'; -             varnum=0; -             //traversing JSON using the DA Lei algorithm to count the required values +              for(varIinchJSON) { -                 //if the current item is greater than the next item +                 if(json[i]>num) { A                     //change the current value to the maximum number of occurrences atnum =Json[i]; -Number =i; -                 } -             } -             //maximum number of values and occurrences of final printing -Alert'the most value that appears is'+number+'The number of occurrences is'+num); in          -</script>

The note is still quite clear the pure hand dozen, the mistake please raise. Salute Silent Classmate!

The number of characters and occurrences of the most occurrences in a string are judged in JS