Top Forums UNIX for Dummies Questions & Answers Limit the number of characters in a bash output Post 302567164 by radoulov on Saturday 22nd of October 2011 05:09:02 PM
Code:
curl -s --connect-timeout 30 ftp://ftp2.bom.gov.au/anon/gen/fwo/IDA00003.html |
  awk -F'<TD valign=top>| &nbsp;</TD>' '$0 ~ where {
    printf "Today:\n%s\nTomorrow:\n%s\n", \
      (length($8) > max ? substr($8, 1, max) "(...)" : $8), \
      (length($14) > max ? substr($14, 1, max) "(...)" : $14)
    exit
    }' where=Melbourne max=20

Sample output:

Code:
% curl -s --connect-timeout 30 ftp://ftp2.bom.gov.au/anon/gen/fwo/IDA00003.html |
  awk -F'<TD valign=top>| &nbsp;</TD>' '$0 ~ where {
    printf "Today:\n%s\nTomorrow:\n%s\n", \
  (length($8) > max ? substr($8, 1, max) "(...)" : $8), \
  (length($14) > max ? substr($14, 1, max) "(...)" : $14)
exit
    }' where=Melbourne max=20     
Today:
Morning fog, late sh(...)
Tomorrow:
Rain at times.

This User Gave Thanks to radoulov For This Post:
 
Test Your Knowledge in Computers #344
Difficulty: Medium
In February 2005, Sun announced the Sun Grid, a grid computing deployment on which it offered utility computing services priced at US$2 per CPU/hour for processing and per GB/month for storage.
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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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