Solved

# Numbers and strings

Posted on 2011-03-16
402 Views
I have a number like 2635 that will be drawn from a db.  I need to create a random 4 digit number and have it put before the number.  I then need to put a different 4 digit number at the end.  So they would all be strung together like 374226358374.

Then, I would need to break this number apart and isolate the original number.

Thanks
0
Question by:Rush_2112
[X]
###### Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

• Help others & share knowledge
• Earn cash & points

LVL 3

Accepted Solution

sajayc earned 500 total points
ID: 35152953
Hi,

This will just involve a couple of variables.

<cfset originalnum = query.number> <!--- This is the value from database  --->
<cfset randbefore = randrange(1000,9999)>
<cfset randafter = randrange(1000,9999)>
<cfset entirenumber = randbefore & originalnum & randafter>
<cfoutput>#entirenumber#</cfoutput>

The variables above will have everything seperate.

If you need to pull your orginal number out of the entire string, this code will do it.
<cfset extractnum = mid(entirenumber, 5, 4)> <!--- entirenum is the variable of the full number  --->
<cfoutput>#extractnum#</cfoutput>

0

LVL 52

Expert Comment

ID: 35153411
(no points)

The technique above will probably be fine for your purposes.  But note RandRange generates pseudo random numbers. So if you have other requirements, like unique numbers, etc... that's something to keep in mind.

0

LVL 11

Expert Comment

ID: 35153720
Another thing is that will your number be always of 4 digits like you have mentioned '2635' or the digits can change, this is because you need to get the number back,

if your number digit change, then you would need to store the number of digits in your orginal number somewhere and use the count in the code posted by @sajayc
<cfset originalNumber = '23456' />
<cfset count = len(originalNumber) />
// code from @sajayc
<!-- EXTRACT , just add the count in there instead of 4 --->
<cfset extractnum = mid(entirenumber, 5, count)> <!--- entirenum is the variable of the full number  --->
<cfoutput>#extractnum#</cfoutput>

Also, as pointed by @_agx_ above, uniquness and randomness are 2 different things, unique is putting a restriction on random generation to have something not already generated.

0

LVL 1

Author Closing Comment

ID: 35159426
Worked perfectly!  Thanks!  And thank you to everyone else who commented
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

### Suggested Solutions

Hi, I will be creating today a basic tutorial on how we can create a Mail Custom Function and use it where ever we want. The main advantage about creating a custom function is that we can accommodate a range of arguments to pass to the Function and …
Recently while working on a project I got a very annoying cfdocument has no body error message. I had never seen this error before. So I checked the code. The code was pretty simple; it was Just showing me the cfdocumnt tag and inside that tag a …
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
###### Suggested Courses
Course of the Month5 days, 22 hours left to enroll