如何更改函数内的字符串？

Question

我正在写一个函数

func-def.sh:

function func() {
    # assign _f_desc here ....
}


run-main.sh :


function call_all_func() {
    source func-def.sh
    # when I call the function from here
    _f_desc= 
    func _f_desc
    # here I must get the function description of the function
    # that was last executed ... 
}

简而言之，我希望将_f_desc传递给func()并期望func()填写描述其用法的短字符串..例如。 _f_desc可能包含"This function multiplies 2 nos"

Answer 1

您不需要显式传递变量以便能够更改它。见下面的脚本：

function call_all_func() {
   local _f_desc
   func
   echo "$_f_desc"
}

function func() {
   _f_desc="This function multiplies 2 nos"
}

现在打电话：

call_all_func

它将打印：

This function multiplies 2 nos