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if(@files && ! scalar keys %tree){$isChanged = 1;}
    else{foreach my $file (@files){$isChanged = 1 && last if( grep { $
+files_cached{'stats'}{$file}{$_} != $params->{'files'}{'stats'}{$file
+}{$_} } ('mtime', 'ctime', 'size') );}}

(@files && ! scalar keys %tree)?
    ($isChanged = 1):
    (foreach my $file (@files){$isChanged = 1 && last if( grep { $file
+s_cached{'stats'}{$file}{$_} != $params->{'files'}{'stats'}{$file}{$_
+} } ('mtime', 'ctime', 'size') )});

if(@files && ! scalar keys %tree){
    $isChanged = 1;
...
        $isChanged = 1 && last if( grep { $files_cached{'stats'}{$file
+}{$_} != $params->{'files'}{'stats'}{$file}{$_} } ('mtime', 'ctime', 
+'size') );
    }
}

(@files && ! scalar keys %tree)?
    ($isChanged = 1):
    (map { my $file = $_; if( grep { $files_cached{'stats'}{$file}{$_}
+ != $params->{'files'}{'stats'}{$file}{$_} } ('mtime', 'ctime', 'size
+') ){$isChanged = 1; last;} } @files);

(@files && ! scalar keys %tree)?
    ($isChanged = 1):
    (map { my $file = $_; $isChanged = 1 if( grep { $files_cached{'sta
+ts'}{$file}{$_} != $params->{'files'}{'stats'}{$file}{$_} } ('mtime',
+ 'ctime', 'size') ) } @files);