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Top Forums Shell Programming and Scripting Perl: find next available lowest number that is available in two arrays Post 302747175 by hcclnoodles on Thursday 20th of December 2012 07:23:03 PM
Old 12-20-2012
Perl: find next available lowest number that is available in two arrays

Hi there. I have a number allocation problem whereby I have 2 arrays built from 2 different sources. The arrays will just contain a listed of sorted numbers

Code:
@a 

1
7
10
14
15
16

@b

1
7
10
11
14
15
16

i need to scan both arrays and find the lowest available number that is available in both arrays that is higher than $min which is set to "10". once it finds the the lowest unused number, it quits and presents it in a variable

So in the case of the two arrays above, the number that would get presented is 12 (as 11 is used in one of the arrays)


I have been trying various things such as setting a counter and looping through the two arrays but have been getting myself in a real pickle of infinate loops and utter mess

I wanted to ask whether anyone could point me in the right direction on the best way to tackle this one?

any advice or guidance would be greatly appreciated

Thanks
 

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MIN(3)									 1								    MIN(3)

min - Find lowest value

SYNOPSIS
mixed min (array $values) DESCRIPTION
mixed min (mixed $value1, mixed $value2, [mixed $...]) If the first and only parameter is an array, min(3) returns the lowest value in that array. If at least two parameters are provided, min(3) returns the smallest 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
min(3) returns the parameter value considered "lowest" 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 min(3) <?php echo min(2, 3, 1, 6, 7); // 1 echo min(array(2, 4, 5)); // 2 // 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 min(0, 'hello'); // 0 echo min('hello', 0); // hello // Here we are comparing -1 < 0, so -1 is the lowest value echo min('hello', -1); // -1 // With multiple arrays of different lengths, min returns the shortest $val = min(array(2, 2, 2), array(1, 1, 1, 1)); // array(2, 2, 2) // Multiple arrays of the same length are compared from left to right // so in our example: 2 == 2, but 4 < 5 $val = min(array(2, 4, 8), array(2, 5, 1)); // array(2, 4, 8) // If both an array and non-array are given, the array is never returned // as comparisons treat arrays as greater than any other value $val = min('string', array(2, 5, 7), 42); // string // 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 examples, both -10 and 10 are treated as TRUE in the comparison $val = min(-10, FALSE, 10); // FALSE $val = min(-10, NULL, 10); // NULL // 0, on the other hand, is treated as FALSE, so is "lower than" TRUE $val = min(0, TRUE); // 0 ?> SEE ALSO
max(3), count(3). PHP Documentation Group MIN(3)
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