Method Verification

[fave77]

Do the checklist before filing the issue:

• [x] Do you have Node.js and all the relevant dev-dependencies installed?
• [x] Is this a bug fix?
• [ ] Is this an enhancement?
• [ ] Is this a feature request?

NOTE: Provide a clear and concise description of the feature that needs to be added! Or if its a bug, then provide the necessary steps to reproduce it along with screenshots.

• Give your answer below:

---

If you take a look at M.check(), M.find() & M.range() modules:

       ...
       return require(`../${arg}`).check;
       ...

       ...
       return require(`../${arg}`).find;
       ...

       ...
       return require(`../${arg}`).range;
       ...

If someone passes 'sum' as an argument then it wouldn't work since sum doesn't have an exported method namely, check, find & range;

So, provide an explicit error handling that throws an error whenever anyone passes another module name as an argument - Error: Invalid Argument! Hint:

         ...
         const number = require('../${arg}');
         if('check' in number) return number.check;
         else /* throw an error */
         ...

Similarly, implement it for M.find() & M.range().

[atsutton]

Hello, I'd like to take a crack at this bug. Is that alright?

[fave77]

@atsutton this issue is only for gssoc19 participants!

[robotjellyzone]

Hello!! i would like to work on it please assign it to me!!

[fave77]

@robotjellyzone you're assigned

[fave77]

@robotjellyzone your time's up!

[devRD]

can I work on this?

[fave77]

@devRD you're assigned