looking-for-strings.js

const strings = ['boo', 'bar', 'biz', 'baz']

// piece everything together
console.log(strings.join()). // boo,bar,biz,baz

// or add a delimiter, like '\n'
console.log(strings.join('\n'))  // boo\nbar\nbiz\baz

// find strings that match our condition
console.log(strings.filter((s) => s.includes('a')))  // [ 'bar', 'baz' ]

// or find just the first string that matches a condition
console.log(strings.find((s) => s.includes('a')))  // bar

// or if you start with one big delimited string and need an array to grep
const altogether = strings.join('\n')
console.log(altogether.split('\n'))  // [ 'boo', 'bar', 'biz', 'baz' ]