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Top Forums Shell Programming and Scripting Splitting comma separated values into an array Post 76135 by tmarikle on Friday 24th of June 2005 05:50:24 PM
Old 06-24-2005
Quote:
Originally Posted by Perderabo
Where do these csv lines come from? I think that I've seen this sort of question before.

And I think that there is an issue that arises when the data contains a comma. What happens then? I seem to remember that the field with a comma is surrounded by quotes, but I don't remember for sure.

I guess that there is (a perhaps null) field before the first comma and after the last comma. Is this correct?
Sorry, our postings must have crossed paths. The csv values are going to be generated from a Java program that I can direct the design of at this stage. The values represent customer parameters to drive some data loads and they are positional. If there were two parameters I would be making simple assignments but since there are several, I decided to use an array.

I can have any number of csv lines to parse during a load session so it's not like picking up a one-time set of control parameters.

As I indicated in my last post, I have apparently ended up in the most logical approach working but I don't know why. I have worked through this for hours and used, what I thought, the exact approach that I documented with no luck. I stumbled on the working lines when I thought that commas could have been the issue and I replaced them with colons. When colons worked, I tried commas again. They worked too!

I don't get it.

BTW, it seems that you are correct with respect to the quotation marks but that is inconsequential. I only care if the parameter was provided or not. I can cope with quotes.

thomas

Last edited by tmarikle; 06-24-2005 at 07:04 PM..
 

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MAX(3)									 1								    MAX(3)

max - Find highest value

SYNOPSIS
mixed max (array $values) DESCRIPTION
mixed max (mixed $value1, mixed $value2, [mixed $...]) If the first and only parameter is an array, max(3) returns the highest value in that array. If at least two parameters are provided, max(3) returns the biggest of these values. Note Values of different types will be compared using the standard comparison rules. For instance, a non-numeric string will be com- pared to an integer as though it were 0, but multiple string values will be compared alphanumerically. The actual value returned will be of the original type with no conversion applied. PARAMETERS
o $values - An array containing the values. o $value1 - Any comparable value. o $value2 - Any comparable value. o $... - Any comparable value. RETURN VALUES
max(3) returns the parameter value considered "highest" according to standard comparisons. If multiple values of different types evaluate as equal (e.g. 0 and 'abc') the first provided to the function will be returned. EXAMPLES
Example #1 Example uses of max(3) <?php echo max(2, 3, 1, 6, 7); // 7 echo max(array(2, 4, 5)); // 5 // The string 'hello' when compared to an int is treated as 0 // Since the two values are equal, the order they are provided determines the result echo max(0, 'hello'); // 0 echo max('hello', 0); // hello // Here we are comparing -1 < 0, so 'hello' is the highest value echo max('hello', -1); // hello // With multiple arrays of different lengths, max returns the longest $val = max(array(2, 2, 2), array(1, 1, 1, 1)); // array(1, 1, 1, 1) // Multiple arrays of the same length are compared from left to right // so in our example: 2 == 2, but 5 > 4 $val = max(array(2, 4, 8), array(2, 5, 1)); // array(2, 5, 1) // If both an array and non-array are given, the array will be returned // as comparisons treat arrays as greater than any other value $val = max('string', array(2, 5, 7), 42); // array(2, 5, 7) // If one argument is NULL or a boolean, it will be compared against // other values using the rule FALSE < TRUE regardless of the other types involved // In the below example, -10 is treated as TRUE in the comparison $val = max(-10, FALSE); // -10 // 0, on the other hand, is treated as FALSE, so is "lower than" TRUE $val = max(0, TRUE); // TRUE ?> SEE ALSO
min(3), count(3). PHP Documentation Group MAX(3)
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