Change object type to character - Snippet #106

Check if an object is of type vector - Snippet #105

Check if an object is of type missing value (NA) - Snippet #104

Check if an object is of type logical - Snippet #103

Check if an object is of type factor - Snippet #102

Check if an object is of type POSIXct or POSIXlt - Snippet #101

Check if an object is of type date - Snippet #100

Check if an object is of type data frame - Snippet #99

Check if an object is of type character - Snippet #98

Check for multiple conditions at the same time - Snippet #97

Check if a value is equal to another value – Snippet #96

Check if a value is smaller than another value – Snippet #95