javascript：repalce (regEx,Fn) how to get the value of arguments in the callback function Fn ()
sources of topics and their own ideas
an example in the extension of regular expression in Chapter 5 of Ruan Yifeng"s introduction to ES6, runtime error.
related codes
let re = /(?<year>\d{4})-(?<month>\d{2})-(?<day>\d{2})/u;
//replace
prn("2015-01-02".replace(re, (matched, // 2015-01-02
capture1, // 2015
capture2, // 01
capture3, // 02
position, // 0
S, // 2015-01-02
groups // {year, month, day}
) => {
let {year, month, day} = arguments[arguments.length - 1]; //
//let {year, month, day} = groups; //OK
return `${day}/${month}/${year}`;
}));
what result do you expect? What is the error message actually seen?
arguments [arguments.length-1] debugging observation, it is valuable and correct, but can not be assigned, too strange?
ask for advice, thank you!
(it"s OK to assign values directly with groups, needless to say. )