我想在字符串中的每个字符之间添加一个“ +”，并在每个空格之间添加一个“ _”（javascript）

Question

For example: "This is code" should return "T+h+i+s_i+s_c+o+d+e"

 function addStuff(str) {
    return str.split("").join("_");
 }

This returns only "This_is_code"

Need help adding the "+"'s

NON REGEX answers please***

Answer 1

> str = "This is code"
"This is code"
> str.split(' ').map(function(x) {return x.split('').join('+')}).join('_')
"T+h+i+s_i+s_c+o+d+e"