Initial commit

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
+}

go.mod

@@ -0,0 +1,3 @@
+module gitlab-ce.niaulang.com/niau-lang/golanghelper
+
+go 1.20