For/Else in Go
Python has a handy for/else construction which is useful for avoiding flag variables when searching for things.
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for thing in things:
if thing == the_thing_i_want:
break
else:
raise RuntimeError("couldn't find the thing")
# Continue, having found what you were looking for.
It turns out you can replicate this control flow in Go.
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func run() error {
for _, t := range things {
if t == theThingIWant {
goto found
}
}
return errors.New("couldn't find the thing")
found:
// Continue, having found what you were looking for.
}