Documentation
Filter
To filter rows from the data frame you can use DataFrame::filter function.
Filter function accepts only one argument which is a ScalarFunction that returns bool value.
Example:
<?php
data_frame()
->read(from_array([
['a' => 100, 'b' => 100],
['a' => 100, 'b' => 200]
]))
->filter(ref('b')->divide(lit(2))->equals(lit('a')))
->write(to_output(false))
->run();
Examples
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