NAME

    String::Util -- String processing utility functions

DESCRIPTION

    String::Util provides a collection of small, handy functions for
    processing strings in various ways.

INSTALLATION

      cpanm String::Util

USAGE

    No functions are exported by default, they must be specified:

      use String::Util qw(trim eqq contains)

    alternately you can use :all to export all of the functions

      use String::Util qw(:all)

FUNCTIONS

 collapse($string)

    collapse() collapses all whitespace in the string down to single
    spaces. Also removes all leading and trailing whitespace. Undefined
    input results in undefined output.

      $var = collapse("  Hello     world!    "); # "Hello world!"

 hascontent($scalar), nocontent($scalar)

    hascontent() returns true if the given argument is defined and contains
    something besides whitespace.

    An undefined value returns false. An empty string returns false. A
    value containing nothing but whitespace (spaces, tabs, carriage
    returns, newlines, backspace) returns false. A string containing any
    other characters (including zero) returns true.

    nocontent() returns the negation of hascontent().

      $var = hascontent("");  # False
      $var = hascontent(" "); # False
      $var = hascontent("a"); # True
    
      $var = nocontent("");   # True
      $var = nocontent("a");  # False

 trim($string), ltrim($string), rtrim($string)

    Returns the string with all leading and trailing whitespace removed.

      $var = trim(" my string  "); # "my string"

    ltrim() trims leading whitespace only.

    rtrim() trims trailing whitespace only.

 nospace($string)

    Removes all whitespace characters from the given string. This includes
    spaces between words.

      $var = nospace("  Hello World!   "); # "HelloWorld!"

 htmlesc($string)

    Formats a string for literal output in HTML. An undefined value is
    returned as an empty string.

    htmlesc() is very similar to CGI.pm's escapeHTML. However, there are a
    few differences. htmlesc() changes an undefined value to an empty
    string, whereas escapeHTML() returns undefs as undefs.

 jsquote($string)

    Escapes and quotes a string for use in JavaScript. Escapes single
    quotes and surrounds the string in single quotes. Returns the modified
    string.

 unquote($string)

    If the given string starts and ends with quotes, removes them.
    Recognizes single quotes and double quotes. The value must begin and
    end with same type of quotes or nothing is done to the value. Undef
    input results in undef output. Some examples and what they return:

      unquote(q|'Hendrix'|);   # Hendrix
      unquote(q|"Hendrix"|);   # Hendrix
      unquote(q|Hendrix|);     # Hendrix
      unquote(q|"Hendrix'|);   # "Hendrix'
      unquote(q|O'Sullivan|);  # O'Sullivan

    option: braces

    If the braces option is true, surrounding braces such as [] and {} are
    also removed. Some examples:

      unquote(q|[Janis]|, braces=>1);  # Janis
      unquote(q|{Janis}|, braces=>1);  # Janis
      unquote(q|(Janis)|, braces=>1);  # Janis

 repeat($string, $count)

    Returns the given string repeated the given number of times. The
    following command outputs "Fred" three times:

      print repeat('Fred', 3), "\n";

    Note that repeat() was created a long time based on a misunderstanding
    of how the perl operator 'x' works. The following command using x would
    perform exactly the same as the above command.

      print 'Fred' x 3, "\n";

    Use whichever you prefer.

 eqq($scalar1, $scalar2)

    Returns true if the two given values are equal. Also returns true if
    both are undef. If only one is undef, or if they are both defined but
    different, returns false. Here are some examples and what they return.

      $var = eqq('x', 'x');     # True
      $var = eqq('x', undef);   # False
      $var = eqq(undef, undef); # True

 neqq($scalar1, $scalar2)

    The opposite of neqq, returns true if the two values are *not* the
    same. Here are some examples and what they return.

      $var = neqq('x', 'x');     # False
      $var = neqq('x', undef);   # True
      $var = neqq(undef, undef); # False

 ords($string)

    Returns the given string represented as the ascii value of each
    character.

      $var = ords('Hendrix'); # {72}{101}{110}{100}{114}{105}{120}

    options

      * convert_spaces=>[true|false]

      If convert_spaces is true (which is the default) then spaces are
      converted to their matching ord values. So, for example, this code:

        $var = ords('a b', convert_spaces=>1); # {97}{32}{98}

      This code returns the same thing:

        $var = ords('a b');                    # {97}{32}{98}

      If convert_spaces is false, then spaces are just returned as spaces.
      So this code:

        ords('a b', convert_spaces=>0);        # {97} {98}

      * alpha_nums

      If the alpha_nums option is false, then characters 0-9, a-z, and A-Z
      are not converted. For example, this code:

        $var = ords('a=b', alpha_nums=>0); # a{61}b

 deords($string)

    Takes the output from ords() and returns the string that original
    created that output.

      $var = deords('{72}{101}{110}{100}{114}{105}{120}'); # 'Hendrix'

 contains($string, $substring)

    Checks if the string contains substring

      $var = contains("Hello world", "Hello");   # true
      $var = contains("Hello world", "llo wor"); # true
      $var = contains("Hello world", "QQQ");     # false
    
      # Also works with grep
      @arr = grep { contains("cat") } @input;

 startswith($string, $substring)

    Checks if the string starts with the characters in substring

      $var = startwith("Hello world", "Hello"); # true
      $var = startwith("Hello world", "H");     # true
      $var = startwith("Hello world", "Q");     # false
    
      # Also works with grep
      @arr = grep { startswith("X") } @input;

 endswith($string, $substring)

    Checks if the string ends with the characters in substring

      $var = endswith("Hello world", "world");   # true
      $var = endswith("Hello world", "d");       # true
      $var = endswith("Hello world", "QQQ");     # false
    
      # Also works with grep
      @arr = grep { endswith("z") } @input;

 crunchlines($string)

    Compacts contiguous newlines into single newlines. Whitespace between
    newlines is ignored, so that two newlines separated by whitespace is
    compacted down to a single newline.

      $var = crunchlines("x\n\n\nx"); # "x\nx";

 sanitize($string, $separator = "_")

    Sanitize all non alpha-numeric characters in a string to underscores.
    This is useful to take a URL, or filename, or text description and know
    you can use it safely in a URL or a filename.

    Note: This will remove any trailing or leading '_' on the string

      $var = sanitize("http://www.google.com/") # http_www_google_com
      $var = sanitize("foo_bar()";              # foo_bar
      $var = sanitize("/path/to/file.txt");     # path_to_file_txt
      $var = sanitize("Big yellow bird!", "."); # Big.yellow.bird

 file_get_contents($string, $boolean)

    Read an entire file from disk into a string. Returns undef if the file
    cannot be read for any reason. Can also return the file as an array of
    lines.

      $str   = file_get_contents("/tmp/file.txt");    # Return a string
      @lines = file_get_contents("/tmp/file.txt", 1); # Return an array

    Note: If you opt to return an array, carriage returns and line feeds
    are removed from the end of each line.

    Note: File is read in UTF-8 mode, unless $FGC_MODE is set to an
    appropriate encoding.

COPYRIGHT AND LICENSE

    Copyright (c) 2012-2016 by Miko O'Sullivan. All rights reserved. This
    program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself. This software comes with NO
    WARRANTY of any kind.

AUTHORS

    Miko O'Sullivan <miko@idocs.com>

    Scott Baker <scott@perturb.org>