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explain tricky err switch

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This commit is contained in:
Mark McGranaghan 2012-10-16 10:39:00 -07:00
parent 342ffb491d
commit 3b081dae26
1 changed files with 3 additions and 3 deletions
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6
examples/line-filters/line-filters.go
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@ -31,9 +31,9 @@ func main() {
for { for {
switch line, err := rdr.ReadString('\n'); err { switch line, err := rdr.ReadString('\n'); err {
// If the read succeeded, write out out the // If the read succeeded (the read `err` is nil),
// uppercased line. Check for an error on the // write out out the uppercased line. Check for an
// write as we do on the read. // error on this write as we do on the read.
case nil: case nil:
ucl := strings.ToUpper(line) ucl := strings.ToUpper(line)
if _, err = out.WriteString(ucl); err != nil { if _, err = out.WriteString(ucl); err != nil {