actually commit more_itertools replacement

Author: otosky

src/dbt_score/more_itertools.py

@@ -0,0 +1,20 @@
+"""Vendored utility functions from https://github.com/more-itertools/more-itertools."""
+
+
+def first_true(iterable, default=None, pred=None):
+    """Returns the first true value in the iterable.
+
+    If no true value is found, returns *default*
+
+    If *pred* is not None, returns the first item for which
+    ``pred(item) == True`` .
+
+        >>> first_true(range(10))
+        1
+        >>> first_true(range(10), pred=lambda x: x > 5)
+        6
+        >>> first_true(range(10), default='missing', pred=lambda x: x > 9)
+        'missing'
+
+    """
+    return next(filter(pred, iterable), default)

tests/test_more_itertools.py

@@ -0,0 +1,22 @@
+"""Tests for vendored more_itertools functions."""
+from dbt_score.more_itertools import first_true
+
+
+class TestFirstTrue:
+    """Tests for `first_true`."""
+
+    def test_something_true(self):
+        """Test with no keyword arguments."""
+        assert first_true(range(10), 1)
+
+    def test_nothing_true(self):
+        """Test default return value."""
+        assert first_true([0, 0, 0]) is None
+
+    def test_default(self):
+        """Test with a default keyword."""
+        assert first_true([0, 0, 0], default="!") == "!"
+
+    def test_pred(self):
+        """Test with a custom predicate."""
+        assert first_true([2, 4, 6], pred=lambda x: x % 3 == 0) == 6