FN_STR_CONCAT

FN_STR_CONCAT是一个字符串拼接函数。根据引用\[2\]中的示例，可以使用concat()方法将指定字符串连接到另一个字符串的结尾。在你提供的代码中，data_str是一个字符串，你可以使用concat()方法将其他字符串连接到data_str的结尾。例如，你可以使用以下代码将'123'连接到data_str的结尾：data_str = data_str.concat('123')。这样，data_str的值将变为原来的data_str加上'123'。
#### 引用[.reference_title]
- *1* [已解决can only concatenate str (not “int“) to str](https://blog.csdn.net/yuan2019035055/article/details/130647489)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^koosearch_v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [String concat(String str)使用](https://blog.csdn.net/expect521/article/details/81029585)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^koosearch_v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [String concat(String str)](https://blog.csdn.net/fu_zhongyuan/article/details/87290506)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^koosearch_v1,239^v3^insert_chatgpt"}} ] [.reference_item]
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