test case:

[ 1, 0, 0, 0, 0, 1, 1, 0, 0, 0 ],
[ 1, 0, 1, 0, 0, 0, 0, 0, 1, 0 ],
[ 1, 0, 1, 0, 1, 1, 1, 0, 1, 0 ],
[ 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 ],
[ 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 ],
[ 0, 0, 0, 0, 1, 1, 1, 0, 0, 0 ],
[ 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 ],
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ],
[ 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 ],
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]

reason for fail: Must return false if ships are in contact

These two, are touching diagonally:

#                v  
[ 0, 0, 0, 0, 1, 1, 1, 0, 0, 0 ],
[ 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 ],
#          ^

Please use markdown formatting next time.

test case:

[
1, 0, 0, 0, 0,
1, 1, 0, 0, 0
],
[
1, 0, 1, 0, 0,
0, 0, 0, 1, 0
],
[
1, 0, 1, 0, 1,
1, 1, 0, 1, 0
],
[
1, 0, 0, 0, 0,
0, 0, 0, 0, 0
],
[
0, 0, 0, 0, 0,
0, 0, 0, 1, 0
],
[
0, 0, 0, 0, 1,
1, 1, 0, 0, 0
],
[
0, 0, 0, 1, 0,
0, 0, 0, 1, 0
],
[
0, 0, 0, 0, 0,
0, 0, 0, 0, 0
],
[
0, 0, 0, 0, 0,
0, 0, 1, 0, 0
],
[
0, 0, 0, 0, 0,
0, 0, 0, 0, 0
]

reason for fail: Must return false if ships are in contact

I can't see how is there a ship in contact with another ship here. What am I missing? Tis is the only scenario my code is failing.

I created a fork with verbose comments to explain what is going on in this solution.
I hope I got it right...

Thank's every one for reply I got the problem. It was in checking if a number is Prime or not what I did was check i < Math.sqrt(n) which should have been i <= Math.sqrt(n).

hobovsky that was the first thing that I chacked still no luck , I am probably doing similar silly mistake here, I will try again.

Not a chance because this is also the case where the '1' is not supposed to be tested , for eg (48,2838);

1 is not a prime number. Its probably the problem here.

It seems I have made a mistake. 1 Is not a prime number as I thought.

Maybe you could tell how much you understand and what makes you confused. Symbol? Syntax? Lib?
So we can explain it to you in a better way

I can't understand a single thing that is going on here

Sorry, I have missread the Kata.

It says in the example:

if j = 5:

..C.....m. returns 'Caught!' <-- not more than j characters between

So actually it is my fault. Sorry for posting it as an issue.

I think there's a problem in Ruby.

x= .....DC...m......
j = 3

it says: Expected: "Caught!", instead got: "Escaped!"

How can it expect Caught if the 'C' is 4 units away from 'm'? It won't reach the mouse, so my answer should be correct, all other atempt cases my solution passes.

No kidding.