Match substring

Question

function testRegExp(s, sub_s) {
var a;
for(var i =0;i<=s.length;i++)
{
a=s.match(sub_s);
return a.join(";");
}}
Plz help me identify the error

Answer 1

.join method works on arrays only ,
You could remove that for loop as it doesn't do anything if I am not wrong and rewrite the function as follow

function testRegExp(s, sub_s) {
var a;

a=s.match(sub_s);
return a;

}

But still it will be helpful if you could provide a description with what output you expect for a certain input

Answer 2

const testRegExp = (s, sub_s) => s.split(" ").filter(word => word.includes(sub_s)).join(";");

Answer 3

thanks for considering my code
Sample Input 1:
Anbutdsirbutdbutbutareviewbutobutverman
but
Sample Output 1:
but;but;but;but;but;but
the program should output all occurrences of "sub_s" separated by semi colons.

Answer 4

You need to remove the for/loop as stated by Abhay.

To get the output you want, you need to pass a RegExp object to the match method instead of a string. This will allow you to use the g flag to indicate that you want to search the whole string and return all matches found.

You can do this manually or use the RegExp constructor. Using your example the RegExp object will look this /but/g,

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/match

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/RegExp

https://code.sololearn.com/Wx4YTYUMRf6o/#js

Answer 5

thanks for ur help.
The output for code is coming out correct but still there is "FAILED TEST #17" BEING DISPLAYED SO i am not able to submit.

Answer 6

The output for code is coming out correct but still there is "FAILED TEST #17" BEING DISPLAYED SO i am not able to submit. SORRY for troubling you again...