Question about sorting -- how to pass an array to a function Post: 302827369

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Top Forums Shell Programming and Scripting Question about sorting -- how to pass an array to a function Post 302827369 by franksunnn on Friday 28th of June 2013 01:55:34 PM

06-28-2013

Registered User

Question about sorting -- how to pass an array to a function

Hi, guys

I just wanted to sort the elements of an array ascendingly.
I know the following code does work well:

Code:

array=(13 435 8 23 100)
for i in {0..4}
do
	j=$((i+1))
	while [[ $j -le 4]]
	do
		if [[ ${array[$i]} -le ${array[$j]} ]]
		then :
		else
			min=${array[$j]}
			${array[$j]}=${array[$i]}
			${array[$i]}=$min
		fi
		((j++))
	done
done

However, I wanted to write a function named "sort" and pass the array as argument to the function.
I know the following code doesn't work:

Code:

array=(13 435 8 23 100)
sort()
{
for i in {0..4}
do
	j=$((i+1))
	while [[ $j -le 4]]
	do
		if [[ ${$1[$i]} -le ${$1[$j]} ]]
		then :
		else
			min=${$1[$j]}
			${$1[$j]}=${$1[$i]}
			${$1[$i]}=$min
		fi
	done
done
}
sort array

And I know it'll be better by using the command "eval" to pass the array to the function like this:

Code:

eval first_num=\${$1[$i]}

but I can't put it to the correct place in the function.
So please give me some ideas~~ Thx

franksunnn

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LEARN ABOUT PHP

rsort

RSORT(3)								 1								  RSORT(3)

rsort - Sort an array in reverse order

SYNOPSIS

       bool rsort (array  &$array, [int  $sort_flags = SORT_REGULAR])

DESCRIPTION

	This function sorts an array in reverse order (highest to lowest).

PARAMETERS

	      o $array
		- The input array.

	      o $sort_flags
		- You may modify the behavior of the sort using the optional parameter $sort_flags, for details see sort(3).

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      rsort(3) example

	      <?php
	      $fruits = array("lemon", "orange", "banana", "apple");
	      rsort($fruits);
	      foreach ($fruits as $key => $val) {
		  echo "$key = $val
";
	      }
	      ?>

	      The above example will output:

	      0 = orange
	      1 = lemon
	      2 = banana
	      3 = apple

	       The fruits have been sorted in reverse alphabetical order.

NOTES

       Note

	      This  function assigns new keys to the elements in $array. It will remove any existing keys that may have been assigned, rather than
	      just reordering the keys.

SEE ALSO

       arsort(3), krsort(3), The comparison of array sorting functions.

PHP Documentation Group 														  RSORT(3)

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LEARN ABOUT PHP

rsort