ee.Array.first_nonzero

On an element-wise basis, selects the first value if it is non-zero, and the second value otherwise.

UsageReturns
Array.first_nonzero(right)Array
ArgumentTypeDetails
this: leftArray

The left-hand value.

rightArray

The right-hand value.

Examples

Code Editor (JavaScript)

var empty = ee.Array([], ee.PixelType.int8());
print(empty.first_nonzero(empty));  // []

print(ee.Array([0]).first_nonzero(0));  // [0]
print(ee.Array([0]).first_nonzero([0]));  // [0]
print(ee.Array([0]).first_nonzero([1]));  // [1]
print(ee.Array([2]).first_nonzero([3]));  // [2]
print(ee.Array([1]).first_nonzero([0]));  // [1]

print(ee.Array([-1, 0, 1]).first_nonzero([2, -1, 2]));  // [-1,-1,1]

// [[1,2],[3,4]]
print(ee.Array([[1, 2], [0, 0]]).first_nonzero([[0, 0], [3, 4]]));