输出对齐（填充空格）

utils/stringUtils.js

@@ -0,0 +1,13 @@
+// 数字转成字符串，同时在前面填充
+function fill(num, length, fillers = " ", atLast = false) {
+    var result = `${num}`;
+    if (result.length < length) {
+        let fillString = new Array(length - result.length + 1).join(fillers)
+        result = atLast ? `${result}${fillString}` : `${fillString}${result}`;
+    }
+    return result;
+}
+
+module.exports = {
+    fill,
+}