An array of simple chestnuts to go heavy

There are many ways to get an array of methods, and here are some examples of ways that you think are easier to understand.

Ideas:

1. Create a new empty array to hold the new array after the redo.
2. Use the For Loop loop to iterate through the array that needs to be weighed.
3. Use the indexOf() method to query whether the traversed array appears in the new array, and if it does: continue to iterate through the array, if it does not appear: Use the push method to add to the new array.
4. After the original array loop traversal is complete, a new array is formed that has been removed.

<Script>    var arr = [1,3,4,5,6,7, 4,3,2,4, 5,6,7, 3,2]; function removerepeatarr (var newArr = []; for (var i = 0; i < arr.length; i++ {if (Newarr.indexof (arr[i]) = = -1) {Newarr.push (arr[i]);}} document.write (NEWARR); } 

 Removerepeatarr     </script>         

indexOf:

return value:

• Returns 1 if the retrieved result has no matching value.
• Returns 1 if the retrieved result matches to.
• The return value is negative positive 0, which is no longer explained in detail, and an explanation is also opened.

An array of simple chestnuts to go heavy