The fat comma, also known as the fat arrow (=>), is a feature in Perl that is commonly used to associate keys with values in hash structures. It provides a cleaner and more readable way of defining key-value pairs compared to the traditional method of using commas and other syntax. Here’s a simple example to illustrate its usage:
my %hash = (
'key1' => 'value1',
'key2' => 'value2',
'key3' => 'value3',
);
print $hash{'key1'}; # Output: value1
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