Fix concurrency for acronyms

Closes #43

acronyms.go

@@ -1,10 +1,13 @@
 package strcase
 
-var uppercaseAcronym = map[string]string{
-	"ID": "id",
-}
+import (
+	"sync"
+)
+
+var uppercaseAcronym = sync.Map{}
+	//"ID": "id",
 
 // ConfigureAcronym allows you to add additional words which will be considered acronyms
 func ConfigureAcronym(key, val string) {
-	uppercaseAcronym[key] = val
+	uppercaseAcronym.Store(key, val)
 }

camel.go

@@ -35,9 +35,9 @@ func toCamelInitCase(s string, initCase bool) string {
 	if s == "" {
 		return s
 	}
-	a, hasAcronym := uppercaseAcronym[s]
+	a, hasAcronym := uppercaseAcronym.Load(s)
 	if hasAcronym {
-		s = a
+		s = a.(string)
 	}
 
 	n := strings.Builder{}

concurrency_test.go

@@ -0,0 +1,46 @@
+package strcase
+
+import (
+	"testing"
+)
+
+func TestConcurrency(t *testing.T) {
+	for i := 0; i < 10000; i++ {
+		go doConvert()
+	}
+
+}
+
+func doConvert() {
+	var snakes = []string{"code", "exchange", "pe_ratio", "profit_margin", "updated_date"}
+	for _, v := range snakes {
+		_ = convertDatabaseNameToCamelCase(v)
+	}
+}
+
+func convertDatabaseNameToCamelCase(d string) (s string) {
+	ConfigureAcronym("price_book_mrq", "PriceBookMRQ")
+	ConfigureAcronym("pe_ratio", "PERatio")
+	ConfigureAcronym("peg_ratio", "PEGRatio")
+	ConfigureAcronym("eps_estimate_current_year", "EPSEstimateCurrentYear")
+	ConfigureAcronym("eps_estimate_next_year", "EPSEstimateNextYear")
+	ConfigureAcronym("eps_estimate_next_quarter", "EPSNextQuarter")
+	ConfigureAcronym("eps_estimate_current_quarter", "EPSEstimateCurrentQuarter")
+	ConfigureAcronym("ebitda", "EBITDA")
+	ConfigureAcronym("operating_margin_ttm", "OperatingMarginTTM")
+	ConfigureAcronym("return_on_assets_ttm", "ReturnOnAssetsTTM")
+	ConfigureAcronym("return_on_equity_ttm", "ReturnOnEquityTTM")
+	ConfigureAcronym("revenue_ttm", "RevenueTTM")
+	ConfigureAcronym("revenue_per_share_ttm", "RevenuePerShareTTM")
+	ConfigureAcronym("quarterly_revenue_growth_yoy", "QuarterlyRevenueGrowthYOY")
+	ConfigureAcronym("gross_profit_ttm", "GrossProfitTTM")
+	ConfigureAcronym("diluted_eps_ttm", "DilutedEpsTTM")
+	ConfigureAcronym("quarterly_earnings_growth_yoy", "QuarterlyEarningsGrowthYOY")
+	ConfigureAcronym("two_hundred_day_ma", "TwoHundredDayMA")
+	ConfigureAcronym("trailing_pe", "TrailingPE")
+	ConfigureAcronym("forward_pe", "ForwardPE")
+	ConfigureAcronym("price_sales_ttm", "PriceSalesTTM")
+	ConfigureAcronym("price_book_mrq", "PriceBookMRQ")
+	s = ToCamel(d)
+	return
+}