Merge and alternate 2 arrays into single array

Stephen · **Posted:** July 25th, 2012, 5:29 pm

Hi,

I've been searching online, without success, to find a way to merge and alternate elements from 2 arrays into a third merged array.

The current script (adapted from an IMP on this forum: viewtopic.php?f=4&t=2744&hilit=simon+says) which has been changed to create one array for 1-6, needs to be modified to create 2 arrays (1-3 and 4-6):

current script

Code:

function separate() 
   {
      

      for(i=1;i<=listamount;i++)
         {
         //create 6 random numbers from 1-6
         temp = Math.round(Math.random()*(6))
         if (temp == 0){temp = 1}
         if (temp == 7){temp = 6}
         
            randomset[i] = temp
         }         
      
   }

Trying a different design as an exercise for an eLearning project, so the current script needs to be revised.

New design: 3 lights on the left side and 3 lights on the right side. Flashing lights need, each time, to alternate right/left, so the random list needs to be comprised of a random pick from left (lights 1, 2, 3) alternating each time with a random pick from right (4, 5, 6). For example, 2,5,1,4,3,6.

So, maybe 2 (A and B) separate 3 member random lists, then merged alternating one random pick from A with one from B, on and on til 6 total?

So far, been stuck. Can't figure out how to script this.

Any help appreciated.

Regards,

Lar_123 · **Posted:** July 26th, 2012, 11:29 pm

Hi Stephen,

As I thought about it, I started to approach it from the "lights" which I assume are buttons. And I wanted to create 2 sets of 3 Buttons each (set L and set R, for example). Then I'd go into a function that "toggled" a variable... e.g., var Leftbank = true ;
Everytime you go through the function, simply have this statement included within the function at the end:

Code:

Leftbank = !Leftbank ; //toggle from true to false to true, etc etc

But since I do not know what manipulations or actions turn your lights on/off, I can suggest you simply modify your current script:

1) change from generating randoms btw 1 and 6 to random btw 0 and 2 (or btw 1 and 3, depending on your indexing, addressing)
2) issue a comman to TURN OFF all of the lights
3) use the convenient switch/case command

Code:

switch( Leftbank )
{
case true:
// list of actions next...  if the variable equals true for modify LEFT set
randomset[i] = temp ;  // let's say temp is a value of:  1, or 2, or 3
break;

case false:
// list of actions next...  if the variable equals false for modify RIGHT set
randomset[i] = 3+ temp ;  // let's say temp is a value of:  1, or 2, or 3 ==> so the result here is 4, 5, or 6
break;

4) You will have to layout your "lights" OBJECTS so values 1, 2, or 3 will properly light up LEFT set
and OBJECTS on the RIGHT will be keyed by 4, 5, or 6

- - - - - - -
The above should work consistently, with one possible issue. You have to make sure you are always calling the function twice (first time will take care of LEFT and then 2nd time will do the RIGHT )

Stephen · **Posted:** July 27th, 2012, 12:55 am

Hi Larry,

Thank you for your helpful reply. With some changing/adapting, this is showing promise. Making progress.

Again, thank you for these suggestions.

Kind Regards,

Digital Workshop

Merge and alternate 2 arrays into single array

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