更改大小写
将文本转换为大写、小写或首字母大写。
- 大写 (UPPER CASE):"hello" -> "HELLO"
- 小写 (lower case):"HELLO" -> "hello"
- 首字母大写 (Title Case):"hello world" -> "Hello World"
去除空格
移除文本开头、末尾或两侧的空格。
- 两侧 (BOTH):" hello " -> "hello"
- 左侧 (LEFT):" hello" -> "hello"
- 右侧 (RIGHT):"hello " -> "hello"