Do not treat numbers as word boundaries (#1)

* Fix camelCase conversion for acronyms containing numbers

* Support acronyms that start with numbers

* update module

* Change default behavior

* Remove unnecessary tests

* Do not treat numbers as word boundaries

* Number followed by capital letter is delimiting

Author: emla9

README.md

@@ -1,59 +1,3 @@
-# strcase
-[![Godoc Reference](https://godoc.org/github.com/iancoleman/strcase?status.svg)](http://godoc.org/github.com/iancoleman/strcase)
-[![Build Status](https://travis-ci.com/iancoleman/strcase.svg)](https://travis-ci.com/iancoleman/strcase)
-[![Coverage](http://gocover.io/_badge/github.com/iancoleman/strcase?0)](http://gocover.io/github.com/iancoleman/strcase)
-[![Go Report Card](https://goreportcard.com/badge/github.com/iancoleman/strcase)](https://goreportcard.com/report/github.com/iancoleman/strcase)
+# go-strcase
 
-strcase is a go package for converting string case to various cases (e.g. [snake case](https://en.wikipedia.org/wiki/Snake_case) or [camel case](https://en.wikipedia.org/wiki/CamelCase)) to see the full conversion table below.
-
-## Example
-
-```go
-s := "AnyKind of_string"
-```
-
-| Function                                  | Result               |
-|-------------------------------------------|----------------------|
-| `ToSnake(s)`                              | `any_kind_of_string` |
-| `ToSnakeWithIgnore(s, '.')`               | `any_kind.of_string` |
-| `ToScreamingSnake(s)`                     | `ANY_KIND_OF_STRING` |
-| `ToKebab(s)`                              | `any-kind-of-string` |
-| `ToScreamingKebab(s)`                     | `ANY-KIND-OF-STRING` |
-| `ToDelimited(s, '.')`                     | `any.kind.of.string` |
-| `ToScreamingDelimited(s, '.', '', true)`  | `ANY.KIND.OF.STRING` |
-| `ToScreamingDelimited(s, '.', ' ', true)` | `ANY.KIND OF.STRING` |
-| `ToCamel(s)`                              | `AnyKindOfString`    |
-| `ToLowerCamel(s)`                         | `anyKindOfString`    |
-
-
-## Install
-
-```bash
-go get -u github.com/iancoleman/strcase
-```
-
-## Custom Acronyms for ToCamel && ToLowerCamel
-
-Often times text can contain specific acronyms which you need to be handled a certain way.
-Out of the box `strcase` treats the string "ID" as "Id" or "id" but there is no way to cater
-for every case in the wild.
-
-To configure your custom acronym globally you can use the following before running any conversion
-
-```go
-import (
-    "github.com/iancoleman/strcase"
-)
-
-func init() {
-    // results in "Api" using ToCamel("API")
-    // results in "api" using ToLowerCamel("API")
-    strcase.ConfigureAcronym("API", "api")
-    
-    // results in "PostgreSQL" using ToCamel("PostgreSQL")
-    // results in "postgreSQL" using ToLowerCamel("PostgreSQL")
-    strcase.ConfigureAcronym("PostgreSQL", "PostgreSQL")
-
-}
-
-```
+Forked from https://github.com/iancoleman/strcase

camel.go

@@ -63,12 +63,9 @@ func toCamelInitCase(s string, initCase bool) string {
 		}
 		prevIsCap = vIsCap
 
-		if vIsCap || vIsLow {
+		if vIsCap || vIsLow || v >= '0' && v <= '9' {
 			n.WriteByte(v)
 			capNext = false
-		} else if vIsNum := v >= '0' && v <= '9'; vIsNum {
-			n.WriteByte(v)
-			capNext = true
 		} else {
 			capNext = v == '_' || v == ' ' || v == '-' || v == '.'
 		}

camel_test.go

@@ -39,9 +39,11 @@ func toCamel(tb testing.TB) {
 		{"many_many_words", "ManyManyWords"},
 		{"AnyKind of_string", "AnyKindOfString"},
 		{"odd-fix", "OddFix"},
-		{"numbers2And55with000", "Numbers2And55With000"},
+		{"numbers2And55with000", "Numbers2And55with000"},
 		{"ID", "Id"},
 		{"CONSTANT_CASE", "ConstantCase"},
+		{"90s-kids", "90sKids"},
+		{"k8s_version", "K8sVersion"},
 	}
 	for _, i := range cases {
 		in := i[0]
@@ -72,6 +74,8 @@ func toLowerCamel(tb testing.TB) {
 		{"some string", "someString"},
 		{" some string", "someString"},
 		{"CONSTANT_CASE", "constantCase"},
+		{"90s-kids", "90sKids"},
+		{"k8s_version", "k8sVersion"},
 	}
 	for _, i := range cases {
 		in := i[0]

go.mod

@@ -1,3 +1,3 @@
-module github.com/iancoleman/strcase
+module github.com/zillow/go-strcase
 
 go 1.16

snake.go

@@ -84,9 +84,8 @@ func ToScreamingDelimited(s string, delimiter uint8, ignore string, screaming bo
 			vIsNum := v >= '0' && v <= '9'
 			nextIsCap := next >= 'A' && next <= 'Z'
 			nextIsLow := next >= 'a' && next <= 'z'
-			nextIsNum := next >= '0' && next <= '9'
 			// add underscore if next letter case type is changed
-			if (vIsCap && (nextIsLow || nextIsNum)) || (vIsLow && (nextIsCap || nextIsNum)) || (vIsNum && (nextIsCap || nextIsLow)) {
+			if (vIsCap && nextIsLow || vIsLow && nextIsCap || vIsNum && nextIsCap) {
 				prevIgnore := ignore != "" && i > 0 && strings.ContainsAny(string(s[i-1]), ignore)
 				if !prevIgnore {
 					if vIsCap && nextIsLow {
@@ -95,7 +94,7 @@ func ToScreamingDelimited(s string, delimiter uint8, ignore string, screaming bo
 						}
 					}
 					n.WriteByte(v)
-					if vIsLow || vIsNum || nextIsNum {
+					if vIsLow || vIsNum && nextIsCap {
 						n.WriteByte(delimiter)
 					}
 					continue

snake_test.go

@@ -44,18 +44,20 @@ func toSnake(tb testing.TB) {
 		{"ManyManyWords", "many_many_words"},
 		{"manyManyWords", "many_many_words"},
 		{"AnyKind of_string", "any_kind_of_string"},
-		{"numbers2and55with000", "numbers_2_and_55_with_000"},
+		{"numbers2and55with000", "numbers2and55with000"},
 		{"JSONData", "json_data"},
 		{"userID", "user_id"},
 		{"AAAbbb", "aa_abbb"},
-		{"1A2", "1_a_2"},
-		{"A1B", "a_1_b"},
-		{"A1A2A3", "a_1_a_2_a_3"},
-		{"A1 A2 A3", "a_1_a_2_a_3"},
-		{"AB1AB2AB3", "ab_1_ab_2_ab_3"},
-		{"AB1 AB2 AB3", "ab_1_ab_2_ab_3"},
+		{"1A2", "1_a2"},
+		{"A1B", "a1_b"},
+		{"A1A2A3", "a1_a2_a3"},
+		{"A1 A2 A3", "a1_a2_a3"},
+		{"AB1AB2AB3", "ab1_ab2_ab3"},
+		{"AB1 AB2 AB3", "ab1_ab2_ab3"},
 		{"some string", "some_string"},
 		{" some string", "some_string"},
+		{"K8sVersion", "k8s_version"},
+		{"90sKids", "90s_kids"},
 	}
 	for _, i := range cases {
 		in := i[0]
@@ -88,7 +90,7 @@ func toSnakeWithIgnore(tb testing.TB) {
 		{"ManyManyWords", "many_many_words"},
 		{"manyManyWords", "many_many_words"},
 		{"AnyKind of_string", "any_kind_of_string"},
-		{"numbers2and55with000", "numbers_2_and_55_with_000"},
+		{"numbers2and55with000", "numbers2and55with000"},
 		{"JSONData", "json_data"},
 		{"AwesomeActivity.UserID", "awesome_activity.user_id", "."},
 		{"AwesomeActivity.User.Id", "awesome_activity.user.id", "."},
@@ -135,7 +137,7 @@ func toDelimited(tb testing.TB) {
 		{"ManyManyWords", "many@many@words"},
 		{"manyManyWords", "many@many@words"},
 		{"AnyKind of_string", "any@kind@of@string"},
-		{"numbers2and55with000", "numbers@2@and@55@with@000"},
+		{"numbers2and55with000", "numbers2and55with000"},
 		{"JSONData", "json@data"},
 		{"userID", "user@id"},
 		{"AAAbbb", "aa@abbb"},