What you probably saw was: 

for ($os_arch) {
        if (/x86_64/) {

[download]

Which is short for: 

for my $os_type ($os_arch) {
        if ($os_type =~ m/x86_64/) {

[download]

In reply to Re^3: simple "if.. elsif.. else.." statements, trying "for.. if.." too by jwkrahn
in thread simple "if.. elsif.. else.." statements, trying "for.. if.." too by JBzh

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