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ToSnake function for golang, convention-compliant
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package main | |
import ( | |
"unicode" | |
) | |
// ToSnake convert the given string to snake case following the Golang format: | |
// acronyms are converted to lower-case and preceded by an underscore. | |
func ToSnake(in string) string { | |
runes := []rune(in) | |
length := len(runes) | |
var out []rune | |
for i := 0; i < length; i++ { | |
if i > 0 && unicode.IsUpper(runes[i]) && ((i+1 < length && unicode.IsLower(runes[i+1])) || unicode.IsLower(runes[i-1])) { | |
out = append(out, '_') | |
} | |
out = append(out, unicode.ToLower(runes[i])) | |
} | |
return string(out) | |
} |
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package main | |
import ( | |
"strings" | |
"testing" | |
) | |
type SnakeTest struct { | |
input string | |
output string | |
} | |
var tests = []SnakeTest{ | |
{"a", "a"}, | |
{"snake", "snake"}, | |
{"A", "a"}, | |
{"ID", "id"}, | |
{"MOTD", "motd"}, | |
{"Snake", "snake"}, | |
{"SnakeTest", "snake_test"}, | |
{"SnakeID", "snake_id"}, | |
{"SnakeIDGoogle", "snake_id_google"}, | |
{"LinuxMOTD", "linux_motd"}, | |
{"OMGWTFBBQ", "omgwtfbbq"}, | |
{"omg_wtf_bbq", "omg_wtf_bbq"}, | |
} | |
func TestToSnake(t *testing.T) { | |
for _, test := range tests { | |
if ToSnake(test.input) != test.output { | |
t.Errorf(`ToSnake("%s"), wanted "%s", got \%s"`, test.input, test.output, ToSnake(test.input)) | |
} | |
} | |
} | |
var benchmarks = []string{ | |
"a", | |
"snake", | |
"A", | |
"Snake", | |
"SnakeTest", | |
"SnakeID", | |
"SnakeIDGoogle", | |
"LinuxMOTD", | |
"OMGWTFBBQ", | |
"omg_wtf_bbq", | |
} | |
func BenchmarkToSnake(b *testing.B) { | |
for i := 0; i < b.N; i++ { | |
for _, input := range benchmarks { | |
ToSnake(input) | |
} | |
} | |
} | |
func BenchmarkToLower(b *testing.B) { | |
for i := 0; i < b.N; i++ { | |
for _, input := range benchmarks { | |
strings.ToLower(input) | |
} | |
} | |
} |
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