修剪字符串头部和尾部的指定字符.
(dos_strtrim string [chars])
string
字符串.
chars
要修剪的目标字符. 如果未指定chars则函数删除字符串头部和尾部的换行,空格和TAB.
如果成功, 返回修改后的字符.
nil 失败时.
Command: (setq str " Hockey is the best ")
" Hockey is the best "
Command: (dos_strtrim str)
"Hockey is the best"