AlgoDaily - Count the Planes

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var assert = require('assert');
​
function numOfPlanes(grid) {
  // fill this in
  return grid;
}
​
const planeMatrix1 = [
  ['.', '.', '.', 'P'],
  ['.', '.', '.', 'P'],
  ['P', 'P', '.', 'P'],
  ['.', '.', '.', 'P'],
];
​
try {
  assert.equal(numOfPlanes([]), 0);
​
  console.log('PASSED: ' + 'assert.equal(numOfPlanes([]), 0)');
} catch (err) {
  console.log(err);
}
​
try {
  assert.equal(numOfPlanes(planeMatrix1), 2);
​
  console.log('PASSED: ' + 'assert.equal(numOfPlanes(planeMatrix1), 2)');
} catch (err) {

OUTPUT

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