Nasal-Interpreter/std/string.nas

# string.nas
# ValKmjolnir 2022/10/5

var join=func(sep, vec){
    var len = size(vec);
    var res = "";
    for(var i = 0; i<len; i+=1) {
        res ~= vec[i];
        res ~= (i==len-1? "":sep);
    }
    return res;
}