commit 35a7205d1c551cfd8d514f11caf2e1d6c7bfe685
Author: dennis <zhishun.xu@gmail.com>
Date:   Fri Aug 18 23:54:06 2023 +0800

    Initial commit

diff --git a/StringUtils.go b/StringUtils.go
new file mode 100644
index 0000000..07bde77
--- /dev/null
+++ b/StringUtils.go
@@ -0,0 +1,35 @@
+package golanghelper
+
+import "strings"
+
+const (
+	EMPTY = ""
+	SPACE = " "
+)
+
+type StringUtils struct {
+}
+
+// IsEmpty 會檢查 str 是否為空值
+func (s *StringUtils) IsEmpty(str string) bool {
+	return len(str) == 0
+}
+
+// LeftPad 將 padStr 以 size 做為長度，向左填滿 str
+func (s *StringUtils) LeftPad(str string, size int, padStr string) string {
+	if s.IsEmpty(padStr) {
+		padStr = SPACE
+	}
+
+	padStrLen := len(padStr)
+	padCount := size - len(str)
+
+	if padCount <= 0 || padCount < padStrLen {
+		return str
+	}
+	if padCount == padStrLen {
+		return padStr + str
+	}
+
+	return strings.Repeat(padStr, padCount) + str
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5e43740
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gitlab-ce.niaulang.com/niau-lang/golanghelper
+
+go 1.20