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8757548eca
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@ -452,7 +452,7 @@ flights %>%
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patterns?
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patterns?
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1. What does `anti_join(flights, airports, by = c("dest" = "faa"))` tell you?
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1. What does `anti_join(flights, airports, by = c("dest" = "faa"))` tell you?
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What does `anti_join(airports, flights, by = c("dest" = "faa"))` tell you?
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What does `anti_join(airports, flights, by = c("faa" = "dest"))` tell you?
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## Join problems
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## Join problems
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