When I need methods on slices I have to declare a new type. But what should I name it?
type SliceSomething []Something or type SomethingSlice []Something?
Since it's read as "slice of something" the first one seems better, but autocomplete would probably prefer the second one.
Variable names in Go should be short rather than long.
This is especially true for local variables with limited scope.
PreferctolineCount. PreferitosliceIndex.The basic rule: the further from its declaration that a name is used, the more descriptive the name must be.
That is why you won't find "Slice" often in the go sources, except in:
encoding/gob/encoder_test.go:335: type recursiveSlice []recursiveSlice
encoding/json/encode_test.go:107: type renamedByteSlice []byte
encoding/json/encode_test.go:108: type renamedRenamedByteSlice []renamedByte
regexp/onepass.go:283: type runeSlice []rune
sort/sort.go:233: type IntSlice []int
sort/sort.go:243: type Float64Slice []float64
sort/sort.go:258: type StringSlice []string
unicode/maketables.go:1118: type runeSlice []rune
So if you have to put 'Slice' in the name, it would be type SomethingSlice []Something rather than type SliceSomething []Something.
Check out Go source code for generally recognized idioms.