新增 README 文件內容，更新 data_get 函數以支援複合式鍵，並增加相應測試案例

Author: xsg-changfuLin

README.md

@@ -1 +1,33 @@
-hi
+# 小工具
+
+## help
+
+### data_get
+
+### data_set
+
+### deepAssign
+
+### deepClineWithJson
+
+### emptyData
+
+### fieldSorter
+
+### gettype
+
+### head
+
+### parameterMerge
+
+### range
+
+### recursiveDeepCopy
+
+### remove
+
+### searchInStr
+
+### strToConvert
+
+### strToHump

src/help/data_get/data_get.test.ts

@@ -28,4 +28,15 @@ test("help.data_get object 測試 1", () => {
         }
     }
     expect(data_get(array, "c.d")).toStrictEqual([1, 2, 3, 4]);
+});
+
+test("help.data_get object 測試 複合式key", () => {
+    const array = {
+        a: 1,
+        b: 2,
+        'c.d': {
+            'd.f': [1, 2, 3, 4]
+        }
+    }
+    expect(data_get(array, "c.d.d.f")).toStrictEqual([1, 2, 3, 4]);
 });

src/help/data_get/data_get.ts

@@ -2,34 +2,32 @@ import { deepCloneWithJson, gettype } from "..";
 
 /**
  * 獲取資料
- * @param data 資料集{key:value}
+ * @param data 資料集 {key:value} 
  * @param key 資料對應的位置 app.column.name
  * @param defaultValue 如果取不到值要給予什麼參數，預設 null
  * @returns
  *
  * {a:[{b:a},{b:a}]}
  * a.b = [a,a]
  */
-export function data_get(data: any, key: string, defaultValue: any = null,): any {
+export function data_get<T = any>(data: { [key: string]: any } | any[] | null | undefined, key: string, defaultValue: any = null,): T {
     switch (gettype(data)) {
         case "object":
             const coypData = deepCloneWithJson(data);
-            const keys = key.split('.');
-            let firstKey = keys.shift();
-            if (!firstKey) return defaultValue;
-            if (!(firstKey in coypData)) return defaultValue;
+            const findKey = Object.keys(coypData).find((k) => key.startsWith(k));
+            if (!findKey) return defaultValue;
 
-            let rep = coypData[firstKey];
-            if (keys.length > 0)
-                rep = data_get(rep, keys.join('.'), defaultValue);
+            key = findKey === key ? '' : key.replace(findKey + '.', '');
+            if (key === '') return coypData[findKey];
+
+            return data_get(coypData[findKey], key, defaultValue);
 
-            return rep ?? defaultValue;
         case 'undefined':
         case 'null':
             return defaultValue;
         case 'array':
             return (data as any[]).map((value: any) => data_get(value, key, defaultValue)) as any;
         default:
-            return data;
+            return data as any;
     }
 }