comparing algorithm

Placebo

2 Csv' , i want to print out fields that do not exist in the second list [sent.csv]

[PHP] <?php

$orig = file("orig.csv");
$sent= file("sent.csv");




for ($i = 0; $i<5; $i++){

$temp = $orig[$i];

for ($j = 0; $j<5; $j++){
if($temp != $sent[$j])
{
$a = $temp;
}
else{}

}
echo "$a<br>";
$a = null;

}

?>[/PHP]

That doesn't work as its severely flawed, how would i compare the first field [eg $temp] with all of the fields in the second csv...

amen

within the loop for the first file you need to loop through the second file for each increment of the first file

always write down the problem/pseudcode before writing code

Placebo

i thought thats what i was doing with the nested loop, no?

thanks

this works, but seems so fragile and put together with a string
[PHP] <?php

$orig = file("orig.csv");
$sent= file("sent.csv");


for ($i = 0; $i<7; $i++){
$count = 1;
$temp = $orig[$i];

for ($j = 0; $j<3; $j++){
if($temp != $sent[$j])
{

$count++;


}
else{}

}
if($count == 4)
{
$a = $temp;
echo "$a<br>";
}
else{}


}



?>[/PHP]


edit: this doesnt work well on the real data, stops on reading a duplicate etc

Placebo

anyone ??

codecrunchers

I think you should load both your files into a data structure and then run your algorithm from there. where are the 7 3 5 and loop indices coming from, post a copy of the .csv content

Placebo

i pumped them into and array and used this
[PHP]$available = array_diff($array, $array3);[/PHP]
and it worked.
which is what i should have done but i think, there were some odd characters in the data which ended the code, as it ran fine for test data.

But would that have mattered if i was just comparing mere strings?