Solved

How do you delete a structure from an array?

Posted on 2009-07-07
4
320 Views
Last Modified: 2012-05-07
I have an array that contains structures, and I want to delete one based on a URL variable. Let's say my array looks like the following:

ThisIsMy - Array
1. ThisIsMy - Structure: firstname, Bob; lastname: Jones; age: 30
2. ThisIsMy - Structure: firstname, Jane; lastname: Doe; age: 23
3. ThisIsMy - Structure: firstname, Sally; lastname: Smith; age: 28

I realize this has to be CF 101 stuff, but how in the world can I delete, say, the second structure in the array if I have delete=2 as a URL variable? All the code I've tried has resulted in a "complex object types cannot be converted to simple values" error or the dreaded "object of type class java.lang.Boolean cannot be used as an array."
0
Comment
Question by:SiobhanElara
[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
  • Learn & ask questions
  • 2
4 Comments
 
LVL 10

Expert Comment

by:js_vaughan
ID: 24799347
ArrayDeleteAt() ...

So if this is your array before-hand :

ThisIsMy[1].Firstname = Bob
ThisIsMy[1].LastName = Jones
ThisIsMy[1].Age = 30
ThisIsMy[2].Firstname = Jane
ThisIsMy[2].LastName = Doe
ThisIsMy[2].Age = 23
ThisIsMy[3].Firstname = Sally
ThisIsMy[3].LastName = Smith
ThisIsMy[3].Age = 28

... and you do <cfset ArrayDeleteAt(2)>
Then this is your result :

ThisIsMy[1].Firstname = Bob
ThisIsMy[1].LastName = Jones
ThisIsMy[1].Age = 30
ThisIsMy[2].Firstname = Sally
ThisIsMy[2].LastName = Smith
ThisIsMy[2].Age = 28
0
 
LVL 39

Accepted Solution

by:
gdemaria earned 500 total points
ID: 24799360
It doesn't sound like you want to delete the structure of the array, it sounds like you want to delete the array element itself.

If your example, if you pass in delete=2, then you want to delete Jane Doe age 23, the entire element of the array.

To do that, use :   <cfset tmp =  arrayDeleteAt(thisIsMy,2)>

where thisIsMy is the array as you have indicated.

0
 
LVL 10

Expert Comment

by:js_vaughan
ID: 24799367
Whoops, i forgot to put the array name in there.

gdemaria is correct!
0
 
LVL 18

Expert Comment

by:Plucka
ID: 24799637
Just incase you want to remove the structure and not delete the array element, you can just do this

<cfset ThisIsMy = [] />

<cfset s1 = {firstName = 'Fred', lastName = 'Flintstone'} />
<cfset s2 = {firstName = 'Fred', lastName = 'Flintstone'} />
<cfset s3 = {firstName = 'Fred', lastName = 'Flintstone'} />

<cfset arrayAppend(ThisIsMy, s1) />
<cfset arrayAppend(ThisIsMy, s2) />
<cfset arrayAppend(ThisIsMy, s3) />

<cfset ThisIsMy[2] = "" />

<cfdump var="#ThisIsMy#" />
0

Featured Post

Business Impact of IT Communications

What are the business impacts of how well businesses communicate during an IT incident? Targeting, speed, and transparency all matter. Find out more in this infographic.

Question has a verified solution.

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

Hi, Even though I have created this Tutorial on My personal Blog, Some people might not able to find my website, So here i am posting it again Today, from the topic it is very clear that i will be showing you here the very basic usage of how we …
This is an updated version of a post made on my blog over 3 years ago. It is unfortunately, still very relevant as we continue to see both SQLi (SQL injection) and XSS (cross site scripting) attacks hitting some of the most recognizable website and …
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question