在javascript中按逗号的首次出现进行拆分

Question

I have a message of the form:

var message = 'hello.there, "how are you, doing" '

Which needs to be split by the first occurrence of ',' such that I have two objects namely 'hello.there'(param 1) and "how are you, doing(param 2)" such that param 2 should be a list of arguments(length=1) and spaces should be preserved?

I have tried something like var param2 = message.split(/,(.+)/)[1]

but that would result in param2 being a string instead of list of arguments.

Answer 1

Just find the first comma, then substr by that:

const pos = message.indexOf(",");
const param1 = message.substr(0, pos);
const param2 = message.substr(pos);

Or if param2 should be an array of the other strings seperated by a comma:

const [param1, ...param2] = message.split(",");

Answer 2

You would have to find the index of the first , , slice the string at that index, and then split the second slice by , :

var i = message.indexOf(',');    //find the index of the first ,
var param1 = message.slice(0,i);    //param1 is the slice from 0 to i
var param2 = message.slice(i+1).split(',');    //param2 is the slice from i+1 splitted at ,

By the way, there are some other methods as well for splitting an array by first occurrence of a token. This SO post might interest you.