Finding a string in an array of strings

Question

I have an array of strings (names) such as:

name =["John Doe","Lutfur Kabir", "Moshiur Imtiaz Rahman", "Clark Kent","Jenny Doe"]

I want to get the index/es of the name that has Doe in it. How do I go about doing it using JavaScript.

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score 1 · Answer 1 · answered Dec 02 '18 at 06:03

You can use Array.prototype.includes:

Find the previous answer here already

var categoriesPresent = ['word', 'word', 'specialword', 'word'];
var categoriesNotPresent = ['word', 'word', 'word'];

var foundPresent = categoriesPresent.includes('specialword');
var foundNotPresent = categoriesNotPresent.includes('specialword');

console.log(foundPresent, foundNotPresent); // true false

score 0 · Answer 2 · answered Dec 02 '18 at 06:02

You can use .reduce() to create an array having indexes of strings containing the desired string:

let data =["John Doe","Lutfur Kabir", "Moshiur Imtiaz Rahman", "Clark Kent","Jenny Doe"];

let result = data.reduce((r, c, i) => {
  if(c.includes('Doe')) { r.push(i); }
  return r;
}, []);

console.log(result);

Finding a string in an array of strings

2 Answers2