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Full Discussion: check line by line in a file
Top Forums Shell Programming and Scripting check line by line in a file Post 302254224 by danmero on Monday 3rd of November 2008 11:24:08 PM
Old 11-04-2008
Code:
# bash --version
GNU bash, version 3.2.39(1)-release (i386-portbld-freebsd6.4)
Copyright (C) 2007 Free Software Foundation, Inc.

# cat file
a a
b c
d d d
1 a
# while read a b;do [ $a == "$b" ] && echo TRUE >> r.txt || echo FALSE >> r.txt; done < file
# cat r.txt
TRUE
FALSE
FALSE
FALSE
#

 

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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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