Builds a new string whose characters are the results of applying a specified function to each of the characters of the input string and concatenating the resulting strings.

生成一个新字符串，其字符是将指定的函数应用于输入字符串的每个字符并连接结果字符串的结果。

youdao

Builds a new string whose characters are the results of applying a specified function to each of the characters of the input string and concatenating the resulting strings.

生成一个新字符串，其字符是将指定的函数应用于输入字符串的每个字符并连接结果字符串的结果。

youdao