Update: added intermediate variables.
my @test = (
"text text text 1 text",
"1 text text text 2 text 3 ",
"text 1 text text 2 text",
"text text text 1 text 2 3.0",
"1 2 3 4 5 6 7 8 9 10 11",
"text text text text"
);
my @filtered = map {/(\d+)(?:\.0*)?\D*$/; $1} @test;
print join "\n", @filtered;
yields:
1
3
2
3
11
Or possibly, depending on your needs, something like:
my @filtered = map {/(\d+(?:\.\d*)?)\D*$/; 0 + $1 || ''} @test;
print join "\n", @filtered;
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