@a = ['a','b','c','d'];
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That's likely not "an array" in the sense you want. That's just an array with a single element that is a reference to another array with four elements. More likely, you want an array of four elements for a start:

@a = ('a','b','c','d');
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Then you want to read splice and then use it.

Once you've got your array set up as described by Corion, use splice

my @a=('a','b','c','d');
splice @a, 2, 1;
print join ",", @a;
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Linux, perl, punk rock, cider: charlieharvey.org.uk.

I prefer to write splice @a, 2, 1, (); it doesn't do anything different, but it makes things clear as well as making things parallel with substr (substr and splice act differently with three arguments, but they act the same with four). Am I the only one?

my @a = ('a', 'b', 'c', 'd');
#or my @a = qw( a b c d );
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To delete the array element containing 'c', see grep:

@a = grep { $_ ne 'c' } @a;
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Update Further to Corion's (and others) advice

• If you know the index of the element you want to delete, use splice
• If you know the contents of the element you want to delete, use grep

@arr = @arr[0,1,3];
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@arr = grep { $_ !~ /c/ } @arr;
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cheers, si_lence

@arr = grep { $_ !~ /c/ } @arr;

That works, of course, with the sample data that we've been given, but in the general case it will remove any element that contains the letter 'c'.

Regular expressions aren't always the answer. Sometimes a simpler approach is right.

@arr = grep { $_ ne 'c' } @arr;
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Hi davorg, you are - of course - right with your remark that regular expressions aren't always the answer.
It really depends on the problem. If a special named file should be removed from the array then ne is probably the better solution.
If all files ending in .log should be removed, then a regex might be the way to go.
Since there is no information about the general problem in the OP we are left guessing.

cheers, si_lence