feat: initial public version

stringx/stringx.go

@@ -0,0 +1,33 @@
+// Package stringx provides helper functions for working with strings.
+package stringx
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"regexp"
+)
+
+var compactRE = regexp.MustCompile(`\s+`)
+
+// Shorten shortens a string to a specified number of characters.
+func Shorten(s string, maxlen int) string {
+	var short = []rune(s)
+	if len(short) > maxlen {
+		short = short[:maxlen]
+		short = append(short, []rune(" [truncated]")...)
+	}
+	return string(short)
+}
+
+// Compact replaces consecutive whitespaces with a single space.
+func Compact(s string) string {
+	return compactRE.ReplaceAllString(string(s), " ")
+}
+
+// RandString generates a random string.
+// length must be even.
+func RandString(length int) string {
+	b := make([]byte, length/2)
+	_, _ = rand.Read(b)
+	return hex.EncodeToString(b)
+}