isBlock
Returns whether a block exists at the specified coordinates.
Usage
let result = isBlock(<location>, <block type>, [block data]);
Arguments
- location- location of the block to check.
- block type- block type.
- block data- block data value. If no data is specified,- -1is used instead.
Example
func testIsBlock() {
    if (isBlock("0 5 0", "dirt", 0)) {
        >>say at coords (0 5 0} there is dirt
    }
}