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  1. stackoverflow.com › questions › 7898499Grep to find item in Perl array - Stack Overflow

    12 Οκτ 2017 · Perl's grep() in scalar context evaluates the expression for each element of a list and returns the number of times the expression was true. So when $match contains any "true" value, grep($match, @array) in scalar context will always return the number of elements in @array .

  2. stackoverflow.com › questions › 28821298How do I use Perl's grep function with an array?

    I am trying to use the grep function in Perl to find the number of matches for a regexp in an array. I know grep is supposed to take a list as its parameter, but unfortunately the data I am trying to access is in the form of an array. Here is a simplified example of my problem:

  3. www.geeksforgeeks.org › perl-grep-functionPerl | grep() Function - GeeksforGeeks

    20 Ιουν 2022 · The grep() function in Perl used to extract any element from the given array which evaluates the true value for the given regular expression. Syntax: grep(Expression, @Array) Parameters: Expression : It is the regular expression which is used to run on each elements of the given array. @Array : It is the given array on which grep() function is ...

  4. www.geeksforgeeks.org › perl-useful-array-functionsPerl | Useful Array functions - GeeksforGeeks

    4 Αυγ 2021 · The grep() function in Perl used to extract any element from the given array which evaluates the true value for the given regular expression. Syntax: grep(Expression, @Array) Parameters: Expression : It is the regular expression which is used to run on each elements of the given array.@Array : It is

  5. alvinalexander.com › blog › postPerl grep array FAQ - How to search an array/list of strings

    4 Ιουν 2016 · A very cool thing about Perl is that you can search lists (arrays) with the Perl grep function. This makes it very easy to find things in large lists -- without having to write your own Perl for/foreach loops. Here's a simple Perl array grep example.

  6. www.thoughtco.com › perl-array-grep-function-quick-tutorial-2641158How to Use the Perl Array Grep() Function - ThoughtCo

    30 Ιουν 2019 · The Perl grep() function is a filter that runs a regular expression on each element of an array and returns only the elements that evaluate as true. Using regular expressions can be extremely powerful and complex. The grep() functions uses the syntax @List = grep(Expression, @array).

  7. perldoc.perl.org › functions › grepgrep - Perldoc Browser

    Evaluates the BLOCK or EXPR for each element of LIST (locally setting $_ to each element) and returns the list value consisting of those elements for which the expression evaluated to true. In scalar context, returns the number of times the expression was true. or equivalently,

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