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  1. perl -0777 -ne 'print "start: $-[0], end: $+[0], xml: {{{$&}}}\n" while /<myelement>.*?<\/myelement>/gs'
Success #stdin #stdout 0.03s 5304KB
comments (?)
stdin 
some arbitrary text
A well-formed xml:

<myelement>
... xml here
</myelement>

some arbitrary text follows more elements: <myelement>... xml</myelement> the end
stdout 
start: 40, end: 77, xml: {{{<myelement>
... xml here
</myelement>}}}
start: 122, end: 152, xml: {{{<myelement>... xml</myelement>}}}
https://ideone.com/UA06QV
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
secret

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