The idea here is to take two strings as input and return true if a is substring of b or b is sub string of a, otherwise return false.
For example −
isSubstr(‘hello’, ‘hello world’) // true isSubstr(‘can I use’ , ‘I us’) //true isSubstr(‘can’, ‘no we are’) //false
Therefore, in the function we will check for the longer string, the one with more characters and check if the other is its substring or not.
Here is the code for doing so −
Example
const str1 = 'This is a self-driving car.'; const str2 = '-driving c'; const str3 = '-dreving'; const isSubstr = (first, second) => { if(first.length > second.length){ return first.includes(second); } return second.includes(first); }; console.log(isSubstr(str1, str2)); console.log(isSubstr(str1, str3a));
Output
The output in the console will be −
true false