#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)^[ATGC]+$"
Local $sString = ">Contig1" & @CRLF & _
"TGGCACCTTCGACAGTTGCTCCCTCCTGGGTGGGGGCCGTCTGACCTCGCTGTACTCCT" & @CRLF & _
">Contig2" & @CRLF & _
"GGGCCTTGGGAAGCGCAGGTGCCGAGAACTTGGCTAGAGCGGTAGACAATGCGGTTCGTG" & @CRLF & _
"AAAAGAGCAACTTTAAATACTTGTACGACCTCAACCAGCCAGTCAAAGAGAAAATCGAG" & @CRLF & _
">NODE_105957_length_443_cov_1.000000" & @CRLF & _
"TCAGAAGTTAATGCAATCTGGTCCATTAAGTAAATGGGTATCATGGTACATAAACTAAAA" & @CRLF & _
"GCACAGAACATGGATTATTTTCCCAATTTTAACTTTCCTAACCATTTTTATCTCTCTCAA" & @CRLF & _
"TAACTTCCACAGTAGTTTTTATTCGTCTCAATAACTTTATTAAAAGGGATCCCTCTATCC" & @CRLF & _
"CCAGAATTCAGTAGCTGCATACGACTTTCCTGTCACTAGAGATCCCTCAGATGTCGGTAG" & @CRLF & _
"TGCATTCATCTTAAGTGATAAATCAAATGTTAGTCAAGTTAGGAAGTGAGAATTGATACA" & @CRLF & _
"GAATTTCTACTTCAATACTAGCTATCCCAAAATGGTCATTGACGATTTATTTTTTTCCTA" & @CRLF & _
"CCAGCATATTCTTTTCTAGTATTTCAGATCTAGTGACTCAGAACTAGGACAATCATAAAT" & @CRLF & _
"TTGAAGGGAACCTTAAGTCTTTTTTCATGCTGAGACTGCCAAG" & @CRLF & _
">NODE_105950_length_95_cov_1.000000" & @CRLF & _
"TCAGGTCCTACTTCATTTGTAAGGAAAACTGACAGGTAATTCAGTGGGACAGAATACCAT" & @CRLF & _
"GTGAAGAGTTTCCTCTCACCTGAGAGGAGACTTTTTGATGATGATGATGATCAAT"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm