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The exists() function in Perl is used to check whether an element in an given array or hash exists or not. This function returns 1 if the desired element is present in the given array or hash else returns 0.
You can use the includes() method in JavaScript to check if an item exists in an array. You can also use it to check if a substring exists within a string. It returns true if the item is found in the array/string and false if the item doesn't exist.
The Perl array reference can also be passed to a subroutine as shown below. sub add_numbers { my $array_ref = shift; ..... } @numbers = (11,2,3,45); $array_ref = add_numbers(\@numbers); In the above code snippet, we need to de-reference the array, so that the subroutine can take the elements from the original array.
Perl Array Accessing To access a single element of a Perl array, use ($) sign before variable name. You can assume that $ sign represents singular value and @ sign represents plural values. Variable name will be followed by square brackets with index number inside it.
I thought there would have been a simple answer for this somewhere on the internet but it seems like I'm having trouble finding a solution. I'm first of all wondering if there's a simple method or function for this:
e.g. ~~ or array.contains() from Perl 5
It would also be nice to know how many different ways of achieving this result there are in Perl 6 as some might be better than others given the situation of the problem.
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