Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

redim vs. erase what is the difference

Posted on 2004-04-26
6
Medium Priority
?
1,175 Views
Last Modified: 2006-11-17
redim vs. erase what is the difference?
I’m having a hard time understanding what the difference between using erase or redim to clear out an array. Can some one fill me in on the pros and Con’s of it?

Thanks
0
Comment
Question by:cdb424ttm
  • 3
  • 2
6 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 10919754
redim can't be used with static arrays.

erase will completely delete a variable arrays and will only reset values of static arrays.
0
 
LVL 33

Expert Comment

by:hongjun
ID: 10919765
ya redim will remove memory (without the preserve)
erase will also do
0
 
LVL 33

Expert Comment

by:hongjun
ID: 10919786
i am not sure what will be the difference in terms of "freeing memory" speed for hugh arrays.
if i am not wrong, i guess redim is faster.
perhaps emoreau can comment on this.
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 76

Accepted Solution

by:
David Lee earned 2000 total points
ID: 10919898
Redim changes the size of an array.  So, for example, I can redim an array and change the size while simultaneously disposing of its contents (if I don't use Redim Preserve).  Erase simply disposes of the contents of the array.  If the array happens to be dynamic, then it also disposes of the array elements themselves, not just their contents.  In contrast, if I use Redim I cannot reduce the array to fewer than one element.  Erase also releases the memory associated with a dynamic array.

dim myArray()          'Create a dynamic array
redim myArray(9)     'Resize the array to 10 elements with the lowest being element 0
redim myArray(0)     'Knocks the array down to one element
redim myArray(9)     'Back to 10 elements
erase myArray          'Array now has no elements

0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 10920056
>>if i am not wrong, i guess redim is faster.
>>perhaps emoreau can comment on this.

I have no idea on this.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Have you ever wanted to restrict the users input in a textbox to numbers, and while doing that make sure that they can't 'cheat' by pasting in non-numeric text? Of course you can do that with code you write yourself but it's tedious and error-prone …
Background What I'm presenting in this article is the result of 2 conditions in my work area: We have a SQL Server production environment but no development or test environment; andWe have an MS Access front end using tables in SQL Server but we a…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
Suggested Courses

926 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