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Posted

Hi,

in a text file, i have the following items

apple

orange

pear

orange

apple

cherry

my routine is:

to read each item into an array and within a "for / next" compare each line read to what was already stored and not store a duplicate. Each time I try to compare an array item to a variable within a for / next, it will always return true even though it sees the variable as 0 and or the read line variable and stored variable differ.

perhaps a bug?

i.e.

$thefile = FileOpen("d:\test.txt", 0)

$index=1

$match=0

while 1

$line = filereadline($thefile)

if @error = -1 then exitloop

$i=1

$match=0

for $i=1 to $index

if $line=$test[$i] then

$match=1

exitloop

endif

next

if $match=0 then

$test[$index]=$line

$index=$index + 1

endif

wend

for $i=1 to $index

msgbox(0,"Listing of Test",$test[$i],)

next

fileclose($thefile)

Posted

Two potential problems:

1) Arrays are indexed starting at zero instead of one

Try for $i=0 to $index-1

2) When you do an equality comparison with a string and an empty array element, the result is always true because a numerical comparsion is used.... You can cast the array element to a string if String($line)=$test[$i] then OR you could make sure your for-loop bounds never compare $line to an empty element.

Use Mozilla | Take a look at My Disorganized AutoIt stuff | Very very old: AutoBuilder 11 Jan 2005 prototype I need to update my sig!
Posted

Oh man, thank you!!!

I prepped my array with a string filler before storing the items from the file.

Should have realized the numerical thingy when everything was resulting in 0.

thanks again.

Posted

2)  When you do an equality comparison with a string and an empty array element, the result is always true because a numerical comparsion is used.... You can cast the array element to a string if String($line)=$test[$i] then  OR you could make sure your for-loop bounds never compare $line to an empty element.

.. OR .. I seem to recall a clever trick (which I haven't had a chance to try yet) .. you can do this:

;Test an array alement for a string value stored in $sTestValue
    If $sTestValue = "" & $aArrayItem[$nX]

HTH :ph34r:

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