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marshallprank

Array delete blank element

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marshallprank

Hi,

i have the following array with 2 blank elements:

dim $arr1[4]

$arr1[0]=""

$arr1[1]="ABC"

$arr1[2]=""

$arr1[3]="xyz"

i want now to delete the blank elements and put the result in a new Array --> this mean i will get in this case just two elemet in $arr2 and the length of the new array ($arr2) will be two:

$arr2[0]="ABC"

$arr2[1]="xyz"

any idea?

Thanks

Edited by marshallprank

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Melba23

marshallprank,

Easy (when you know how)! :mellow:

#include <Array.au3>

Global $Content_Subfolder_include[3] = ["", "ABC", ""]

; Copy the array
$arr_2 = $Content_Subfolder_include

; Move backwards through the array deleting the blank lines
For $i = UBound($arr_2) - 1 To 0 Step -1
    If $arr_2[$i] = "" Then
        _ArrayDelete($arr_2, $i)
    EndIf
Next

; Et voila!
_ArrayDisplay($arr_2)

Note you need to move backwards through the array when deleting lines or you end up with element indexing errors. :)

All clear? :)

M23

Edit: And it still works if you add an element to the initial array as you have just done in your edit. But do rermember to increase the dimension size of the initial array if you do that. :)

Edited by Melba23
  • Like 2

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wakillon

Something like this ?

#include <Array.au3>

dim $arr1[4]
$arr1[0]=""
$arr1[1]="ABC"
$arr1[2]=""
$arr1[3]="xyz"


$arr2 = _RemoveEmptyArrayElements ( $arr1 )
_ArrayDisplay ( $arr2 )

Func _RemoveEmptyArrayElements ( $_Array )
    Local $_Item
    For $_Element In $_Array
        If $_Element= '' Then
            _ArrayDelete ( $_Array, $_Item )
        Else
            $_Item+=1
        EndIf
    Next
    Return ( $_Array )
EndFunc ;==> _RemoveEmptyArrayElements ( )
  • Like 2

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marshallprank

thank you very much for help :mellow:

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hannes08

If you have big arrays I suggest you to do the following:

#include <array.au3>

dim $arr1[4]
$arr1[0]=""
$arr1[1]="ABC"
$arr1[2]=""
$arr1[3]="xyz"

$s_array = _ArrayToString($arr1, "|")
$s_array = StringReplace($s_array, "||", "|")

$arr2 = StringSplit($s_array, "|", 2)

It is much faster than _ArrayDelete() because you don't have to redim the array all the time. :mellow:

  • Like 4

Regards,Hannes[spoiler]If you can't convince them, confuse them![/spoiler]

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Melba23

Hannes123,

Nice piece of lateral thinking there! :mellow:

M23


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______Open Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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aNewLyfe

If you have big arrays I suggest you to do the following:

#include <array.au3>

dim $arr1[4]
$arr1[0]=""
$arr1[1]="ABC"
$arr1[2]=""
$arr1[3]="xyz"

$s_array = _ArrayToString($arr1, "|")
$s_array = StringReplace($s_array, "||", "|")

$arr2 = StringSplit($s_array, "|", 2)

It is much faster than _ArrayDelete() because you don't have to redim the array all the time. :mellow:

thanks for this :)

:alien: ~ Every Living Thing is a Code Snippet of World Application ~ :alien:

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Bowmore

An example of how to remove blanks using only the original array.

Func _ArryRemoveBlanks(ByRef $arr)
  $idx = 0
  For $i = 0 To UBound($arr) - 1
    If $arr[$i] <> "" Then
      $arr[$idx] = $arr[$i]
      $idx += 1
    EndIf
  Next
  ReDim $arr[$idx]
EndFunc ;==>_ArryRemoveBlanks

;Some code just to show it working
#include <array.au3>
Dim $arr1[10]
$arr1[0] = ""
$arr1[1] = "ABC"
$arr1[2] = ""
$arr1[3] = "xyz"
$arr1[4] = "def"
$arr1[5] = ""
$arr1[6] = ""
$arr1[7] = "ffr"
$arr1[8] = ""
$arr1[9] = "Z33"

_ArrayDisplay($arr1, "Before")
_ArryRemoveBlanks($arr1)
_ArrayDisplay($arr1, "After")
Edited by Bowmore
  • Like 4

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monoscout999

An example of how to remove blanks using only the original array.

Func _ArryRemoveBlanks(ByRef $arr)
  $idx = 0
  For $i = 0 To UBound($arr) - 1
    If $arr[$i] <> "" Then
      $arr[$idx] = $arr[$i]
      $idx += 1
    EndIf
  Next
  ReDim $arr[$idx]
EndFunc ;==>_ArryRemoveBlanks

;Some code just to show it working
#include <array.au3>
Dim $arr1[10]
$arr1[0] = ""
$arr1[1] = "ABC"
$arr1[2] = ""
$arr1[3] = "xyz"
$arr1[4] = "def"
$arr1[5] = ""
$arr1[6] = ""
$arr1[7] = "ffr"
$arr1[8] = ""
$arr1[9] = "Z33"

_ArrayDisplay($arr1, "Before")
_ArryRemoveBlanks($arr1)
_ArrayDisplay($arr1, "After")

Nice Method i like this one

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Oblivionx

If you have big arrays I suggest you to do the following:

#include <array.au3>

dim $arr1[4]
$arr1[0]=""
$arr1[1]="ABC"
$arr1[2]=""
$arr1[3]="xyz"

$s_array = _ArrayToString($arr1, "|")
$s_array = StringReplace($s_array, "||", "|")

$arr2 = StringSplit($s_array, "|", 2)

It is much faster than _ArrayDelete() because you don't have to redim the array all the time. :)

Have you tried it yet?In fact, it's slowest method when convert to string and redim new array ;))
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guinness

Oblivionx,

Have you seen the date of that post? Try not to make a habit of necroing threads, especially when you have nothing useful to contribute. Thanks.


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atwolf359

Old solution, new to me, thank you Bowmore.

for my own purposes i changed the the line

If $arr[$i] <> "" Then

  To:      

If StringStripWS($arr[$i], 8) <> "" Then

to remove white space which is not null


I've been on the net so long, I remember when I could only e-mail myself!

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iamtheky

I think you should have gone back further to Hannes answer and then have some nested fun

#include <array.au3>

dim $arr1[5]
$arr1[0]=""
$arr1[1]="ABC"
$arr1[2]=""
$arr1[3]="xyz"
$arr1[4]=""

_ArrayDisplay(StringSplit(StringRegExpReplace(StringRegExpReplace(_ArrayToString($arr1, "|"), "(\A\|)|(\|\z)", "") , "(\|\|)" , "|") , "|" , 2))

 


,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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BrewManNH

Necropost.png

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iamtheky

Because the forums are a veritable hotbed of activity today this will throw everything off, what were we thinking.


,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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