Sign in to follow this  
Followers 0
Runner

Help with $arr[ ] - $arr[ ]

6 posts in this topic

I can't figure for the life of me why I keep getting a zero result for line 10 in the following code?

Local $arr[15]
Local Const $sFilePath = "C:\IRTest2.txt"
Local $hFileOpen = FileOpen($sFilePath, 0) ; handle for file
  
$sFileRead = FileRead($hFileOpen)
FileClose($hFileOpen)

Local $arr = StringSplit($sFileRead, "," & @LF)

   ConsoleWrite($arr[3] - $arr[1])
IRTest2.txt file is this:

"01348","0","01355","0","01473","1","01498","0","01533","1","01558","0","01593","1"
 If I change the ' - ' to '&' in line 10 I get this output:>  "01355""01348". So the variables have the right values.

But this works:

Local $arr[20]
$arr[11] = "01348"
$arr[13] = "01355"
ConsoleWrite($arr[13] - $arr[11])
Output for this one is 7.

 

So what am I missing? I've tried using Number($arr[3]... ,etc still returns zero.

Share this post


Link to post
Share on other sites



#2 ·  Posted (edited)

Remove the quotes from the file when you read it (or elsewhere in the script) so that the variable isn't forced to be treated as a string.

For example, replace your FileRead with:

$sFileRead = StringReplace(FileRead($hFileOpen), '"', '')

EDIT: If it is still not clear why your second test example worked but the first script reading the file failed, consider that keeping the quotes when you read the file would actually make the second example look like the following snippet and also fail (when you treat the strings as numbers in the example, they are equal to zero):

Local $arr[20]

$arr[11] = '"01348"'

$arr[13] = '"01355"'

ConsoleWrite($arr[13] - $arr[11])
Edited by DW1

Share this post


Link to post
Share on other sites

Your numbers have quotes around them in the array. They're seen as strings because of them, and string minus string equals 0.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

Share this post


Link to post
Share on other sites

But it works in the last example? Why?

Share this post


Link to post
Share on other sites

But it works in the last example? Why?

As I added to my post, because you are not keeping quotes in the second script, forcing the variable to be read as a string.  See my edited post above.

Share this post


Link to post
Share on other sites

Excellent! I've got it now.

Thanks for the added edit that made it clear.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0