Python Linq.first_or_default Beispiele

Beispiel #1

 def test_first_or_default2(self):
     linq = Linq([])
     assert_equal(linq.first_or_default(), None)
     assert_equal(linq.first_or_default(default=100), 100)
     assert_equal(linq.first_or_default(default=100), 100)

Beispiel #2

 def test_first_or_default3(self):
     linq = Linq([11, 14, 15, 19])
     assert_equal(linq.first_or_default(cond_f=lambda x: x % 2 == 0), 14)
     assert_equal(linq.first_or_default(cond_f=lambda x: x % 2 == 0), 14)

Beispiel #3

 def test_first_or_default(self):
     linq = Linq([11, 13, 15, 19])
     assert_equal(linq.first_or_default(), 11)
     assert_equal(linq.first_or_default(), 11)