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Top Forums UNIX for Beginners Questions & Answers Find file dont have that string Post 303033803 by Don Cragun on Thursday 11th of April 2019 06:58:21 PM
Old 04-11-2019
Quote:
Originally Posted by MadeInGermany
Don, the difference is with empty files and multi-line files:
Code:
$ printf "a\n" > a1
$ printf "b\n" > b1
$ printf "a\nb\n" > ab2
$ printf "" > e0
$ grep -FL "a" a1 b1 ab2 e0
b1
e0
$ grep -Flv "a" a1 b1 ab2 e0
b1
ab2

Only the one-line files a1 and b1 behave the same.
Yes. I apologize for being vague. What I should have said was:

The grep -Flv "a" ... will list a file operand if that file contains one or more lines that do not contain "a".

The grep -FL "a" ... will list a file operand if that file does not contain any lines that contain "a".

No matter what pattern you are searching for, grep -FL pattern file... will always list every file operand that names an empty file and grep -Flv pattern file... will never list any file operand that names an empty file.
These 2 Users Gave Thanks to Don Cragun For This Post:
 

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STR_WORD_COUNT(3)							 1							 STR_WORD_COUNT(3)

str_word_count - Return information about words used in a string

SYNOPSIS
mixed str_word_count (string $string, [int $format], [string $charlist]) DESCRIPTION
Counts the number of words inside $string. If the optional $format is not specified, then the return value will be an integer representing the number of words found. In the event the $format is specified, the return value will be an array, content of which is dependent on the $format. The possible value for the $format and the resultant outputs are listed below. For the purpose of this function, 'word' is defined as a locale dependent string containing alphabetic characters, which also may contain, but not start with "'" and "-" characters. PARAMETERS
o $string - The string o $format - Specify the return value of this function. The current supported values are: o 0 - returns the number of words found o 1 - returns an array containing all the words found inside the $string o 2 - returns an associative array, where the key is the numeric position of the word inside the $string and the value is the actual word itself o $charlist - A list of additional characters which will be considered as 'word' RETURN VALUES
Returns an array or an integer, depending on the $format chosen. CHANGELOG
+--------+--------------------------------+ |Version | | | | | | | Description | | | | +--------+--------------------------------+ | 5.1.0 | | | | | | | Added the $charlist parameter | | | | +--------+--------------------------------+ EXAMPLES
Example #1 A str_word_count(3) example <?php $str = "Hello fri3nd, you're looking good today!"; print_r(str_word_count($str, 1)); print_r(str_word_count($str, 2)); print_r(str_word_count($str, 1, 'aaac3')); echo str_word_count($str); ?> The above example will output: Array ( [0] => Hello [1] => fri [2] => nd [3] => you're [4] => looking [5] => good [6] => today ) Array ( [0] => Hello [6] => fri [10] => nd [14] => you're [29] => looking [46] => good [51] => today ) Array ( [0] => Hello [1] => fri3nd [2] => you're [3] => looking [4] => good [5] => today ) 7 SEE ALSO
explode(3), preg_split(3), split(3), count_chars(3), substr_count(3). PHP Documentation Group STR_WORD_COUNT(3)
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