Moving array elements

Questions & Answers
1

Is there an easy way to move all elements up or down by a certain amount and then set the spaces that would be empty to null? Say I have an int array that is 5 elements long and I want to move them all up by 1. Now array[4] is equal to what array[3] was, array[3] is now what array[2] was and so on while array[0] is now null. Can I somehow modify Array.Push to do this?

2

One solution is to have a temp array and use that to shift the original array.
This is what I would do (js):

private var OriginalArray : int[];
private var tempArray : int [];

function Start ()
	{
	OriginalArray = new int[5];
	OriginalArray = [2,3,48,9,5]; //--this instantiation is only for demonstration prposes
	OriginalArray = Shift("down", OriginalArray, 3);
	//-----------Print the new array------------------
	var tempPrint2 = "";
	for (i in OriginalArray)
		{
		tempPrint2 += " " + i.ToString();
		}
	Debug.Log(tempPrint2);
	}


function Shift (direction : String, arr : Array, ShiftSpaces : int)
	{
	tempArray = arr;
	//----------Print the original array-------------------
	var tempPrint = "";
	for (i in arr)
		{
		tempPrint += " " + i.ToString();
		}
	Debug.Log(tempPrint);
	//------------------------------------------------------
	for (i = 0; i < tempArray.length; i++)
		{
		if (direction == "up")
			{
			try
				{
				arr *= tempArray[i + ShiftSpaces];*

  •  		}*

  •  	catch (err)*

  •  		{}*

  •  	}*

  •  else*

  •  	{*

  •  	try*

  •  		{*

  •  		if ((i + ShiftSpaces) < tempArray.length)*

  •  			{*

_ arr[i + ShiftSpaces] = tempArray*;_
_ }_
_ }_
_ catch (err)_
_ {}_
_ }_
_ }_
_ //-----------Erase the now unrelevant data--------------_
_ if (direction == “up”)_
_ {_
_ for (i = 0; i < ShiftSpaces; i++)_
_ {_
_ arr[(tempArray.length - 1) - i] = 0;//— I replaced with 0 for the print. It can’t print null. just switch to null if you like, and erase the prints*_
* }*
* }*
* else*
* {*
* for (i = 0; i < ShiftSpaces; i++)*
* {*
_ arr = 0;
* }
 }
 return arr;
 }*
This script will do the job, but if anyone has a better idea, please share it._

3

may be a bit redundant but this may make things simpler for you if you want to manage arrays that way.

var copyArr:Array = new Array(myArr.length);

for (var i=copyArr.length-1;i>0;i--) {
   copyArr*=myArr[i-1];*

}
copyArr will have all the values of myArr but everything pushed up one element then simply make myArr elements equal the same as the copy.
var copyArr:Array = new Array(myArr.length);

for (var i=0;i<copyArr.length-1;i++) {
copyArr*=myArr[i+1];*
}
and that pushes them down