for loop string each word

Question

if this type character '這' = NonEnglish each will take up 2 word space, and English will take up 1 word space, Max length limit is 10 word space; How to get the first 10 space.
for below example how to get the result This這 is?
I'm trying to use for loop from first word but I don't know how to get each word in string...

string = "This這 is是 English中文 …";

var NonEnglish = "[^\u0000-\u0080]+",
    Pattern = new RegExp(NonEnglish),
    MaxLength = 10,
    Ratio = 2;

Answer 1

If you mean you want to get that part of the string where it's length has reached 10, here's the answer:

var string = "This這 is是 English中文 …";

function check(string){
  // Length of A-Za-z characters is 1, and other characters which OP wants is 2
  var length = i = 0, len = string.length; 

  // you can iterate over strings just as like arrays
  for(;i < len; i++){

    // if the character is what the OP wants, add 2, else 1
    length += /\u0000-\u0080/.test(string[i]) ? 2 : 1;

    // if length is >= 10, come out of loop
    if(length >= 10) break;
  }

  // return string from the first letter till the index where we aborted the for loop
  return string.substr(0, i);
}

alert(check(string));

Live Demo

EDIT 1:

1. Replaced .match with .test. The former returns a whole array while the latter simply returns true or false.
2. Improved RegEx. Since we are checking only one character, no need for ^ and + that were before.
3. Replaced len with string.length. Here's why.