详解js删除数组中的指定元素

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
 </head>
 
 <body>
  <div class="demo">
   <p>数组：mon, tue, wed, thur</p>
   <p class="p"></p>
 
  </div>
 
 </body>
 
 <script type="text/javascript">
  function removeByValue(arr, val) {
   for(var i = 0; i < arr.length; i++) {
    if(arr[i] == val) {
     arr.splice(i, 1);
     break;
    }
   }
  }
  var somearray = ["mon", "tue", "wed", "thur"]
  removeByValue(somearray, "tue");
  //somearray will now have "mon", "wed", "thur"
 
  document.write("<p>新数组：" + somearray + "</p>");
 </script>
 
</html>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
  </head>
  <body>
    <div class="demo">
      <p>数组：mon, tue, wed, thur</p>
      <p>删除指定元素"tue"后：</p>
    </div>
  </body>
  <script type="text/javascript">
    Array.prototype.removeByValue = function(val) {
      for(var i = 0; i < this.length; i++) {
        if(this[i] == val) {
          this.splice(i, 1);
          break;
        }
      }
    }
    var somearray = ["mon", "tue", "wed", "thur"]
    somearray.removeByValue("wed");
    //somearray will now have "mon", "wed", "thur"
 
    document.write("<p>新数组：" + somearray + "</p>");
  </script>
 
</html>