I need to split a string, but grab the second half of the string...

var str = "How, are, you, doing, today?";
var res = str.split(",", 3);

console.log(res);

I need to split a string, but grab the second half of the string...

var str = "How, are, you, doing, today?";
var res = str.split(",", 3);

console.log(res);

Returns "How,are,you." How can I get "doing,today?"?

Perhaps split() isn't the best way? All I would like is to do is essentially split the string in half and get both values as different variables.

• javascript

Share Improve this question Follow edited Aug 30, 2019 at 23:59 Djaouad 22.8k44 gold badges3636 silver badges5656 bronze badges asked Aug 30, 2019 at 23:53 SAASAA 3711 silver badge77 bronze badges

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2 Answers 2

Sorted by: Reset to default 4

You can use split to get all values (by not passing a number to it), and then use slice to get values from index 3 to the end of the list of values:

var str = "How, are, you, doing, today?";
var res = str.split(",").slice(3);

console.log(res);

If you don't know what the length of your CSV string will be, you could:

const get2ndHalf = (csv, del = ',') => {
  const arr = csv.split(del);
  return arr.slice(Math.ceil(arr.length / 2)).join(del).trim();
} 

console.log( get2ndHalf("How, are, you, doing, today?") )
console.log( get2ndHalf("This; one; is; a; tiny; bit; longer!", ";") ) // using delimiter ;
console.log( get2ndHalf("One") ) // Hummmm maybe rather Math.floor instead of math.ceil!

Or even better, to prevent empty results (like in the example above) use Math.floor

const get2ndHalf = (csv, del = ',') => {
  const arr = csv.split(del);
  return arr.slice(Math.floor(arr.length / 2)).join(del).trim();
} 

console.log( get2ndHalf("How, are, you, doing, today?") )
console.log( get2ndHalf("This; one; is; a; tiny; bit; longer!", ";") ) // using delimiter ;
console.log( get2ndHalf("One") ) // Now this one is legit!