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Full Discussion: Alphabetical help.
Homework and Emergencies Homework & Coursework Questions Alphabetical help. Post 302548792 by yazu on Friday 19th of August 2011 09:46:52 AM
Old 08-19-2011
No. Because of the absence of the priority of boolean operators in shell. You should use some kind of parenthesis:
Code:
for letter in A _ B o D 0 Z  ; do
  if [[ "$letter" < Z  || "$letter" == Z ]] && [[ "$letter" > A || "$letter" == A ]]; then
    echo "$letter" is in A..Z
  else
    echo "$letter" is not in A..Z
  fi
done

Ha! It doesn't work. Some kind of bash quirks - "o" is in A..Z. (and in ksh but not in zsh).
Ok. You can use
Code:
for letter in A _ B o D 0 Z  ; do                                            
  if echo {A..Z} | egrep -q " ?$letter ?"; then
    echo "$letter" is in A..Z
  else
    echo "$letter" is not in A..Z
  fi
done


Last edited by yazu; 08-19-2011 at 11:01 AM..
 

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RANGE(3)								 1								  RANGE(3)

range - Create an array containing a range of elements

SYNOPSIS
array range (mixed $start, mixed $end, [number $step = 1]) DESCRIPTION
Create an array containing a range of elements. PARAMETERS
o $start - First value of the sequence. o $end - The sequence is ended upon reaching the $end value. o $step - If a $step value is given, it will be used as the increment between elements in the sequence. $step should be given as a posi- tive number. If not specified, $step will default to 1. RETURN VALUES
Returns an array of elements from $start to $end, inclusive. EXAMPLES
Example #1 range(3) examples <?php // array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) foreach (range(0, 12) as $number) { echo $number; } // The step parameter // array(0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100) foreach (range(0, 100, 10) as $number) { echo $number; } // Usage of character sequences // array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'); foreach (range('a', 'i') as $letter) { echo $letter; } // array('c', 'b', 'a'); foreach (range('c', 'a') as $letter) { echo $letter; } ?> NOTES
Note Character sequence values are limited to a length of one. If a length greater than one is entered, only the first character is used. SEE ALSO
shuffle(3), array_fill(3), foreach. PHP Documentation Group RANGE(3)
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