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could someone please tell why the red regex does not work - I need to be sure line contains on first filed
if and then [numbers][whitespace]=[whitespace] and the rest not important here


$ echo "if1     sfdsf\nif12 = jfsflk\n   if4    =       sfsf"|awk '$1~/^if[0-9]+/'
if1     sfdsf
if12 = jfsflk
   if4    =       sfsf
$ echo "if1     sfdsf\nif12 = jfsflk\n   if4    =       sfsf"|awk '$1~/^if[0-9]+[[:space:]]*=[[:space:]]*/'
$ echo "if1     sfdsf\nif12 = jfsflk\n   if4    =       sfsf"|awk '$1~/^if[0-9]+[ \t]+=[ \t]+/'

RE: regex

indeed...thank you!
anyhow I changed it to:
awk '$1~/^if[0-9]+/&&$2=="="'

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