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Leetcode problem acceptance assistant

Show the problem's acceptance on the problem page

当前为 2015-02-16 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Leetcode problem acceptance assistant
  3. // @namespace    http://halfcrazy.me
  4. // @version      0.1
  5. // @description  Show the problem's acceptance on the problem page
  6. // @author       halfcrazy
  7. // @match        http*://oj.leetcode.com/problems/*
  8. // @grant        none
  9. // ==/UserScript==
  10. function getElementsByClassName(node,classname){
  11.     if(node.getElementsByClassName){
  12.         return node.getElementsByClassName(classname);
  13.     }else{
  14.         var results = new Array();
  15.         var elems = node.getElementsByTag("*");
  16.         for (var i=0;i<elems.length;i++){
  17.             if(elems[i].className.indexOf(classname) != -1){
  18.                 results[elems.length] = elems[i];
  19.             }
  20.         }
  21.         return results;
  22.     }
  23. }
  24.  
  25. function changeTwoDecimal(x)
  26. {
  27.     var f_x = parseFloat(x);
  28.     if (isNaN(f_x))
  29.     {
  30.         alert('function:changeTwoDecimal->parameter error');
  31.         return false;
  32.     }
  33.     f_x = Math.round(f_x *100)/100;
  34.     
  35.     return f_x;
  36. }
  37.  
  38. function insertAfter(newElement, targetElement) 
  39. { 
  40.     var parent = targetElement.parentNode; 
  41.     if(parent.lastChild == targetElement) 
  42.     { 
  43.         parent.appendChild(newElement); 
  44.     } 
  45.     else 
  46.     { 
  47.         parent.insertBefore(newElement, targetElement.nextSibling); 
  48.     } 
  49. } 
  50.  
  51. var question_title = getElementsByClassName(document,"question-title");
  52. if(typeof(question_title[0]) == "undefined")
  53. {
  54.     return;
  55. }
  56. else
  57. {
  58.     var Total_Accepted = question_title[0].childNodes[3].getElementsByTagName("strong");
  59.     var Total_Submissions = question_title[0].childNodes[5].getElementsByTagName("strong");
  60.     var accepted = Total_Accepted[0].innerText;
  61.     var submissions = Total_Submissions[0].innerText;
  62.     var rate = changeTwoDecimal(accepted/submissions*100);
  63.     var newNode = document.createElement("span");
  64.     newNode.setAttribute("class", "total-ac text-info");
  65.     newNode.innerHTML = "Accepted Rate: <strong>"+rate+"%"+"</strong>";
  66.     insertAfter(newNode,question_title[0].childNodes[5]);
  67. }