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Getting keys

You can also get and set the keys programmatically. In this exercise, only one of netflix and imdb has their key set. Your job is to find out which data.table has had their key set, then use that to set the key for the other data.table.

Cet exercice fait partie du cours

Joining Data with data.table in R

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Instructions

  • Check whether netflix and imdb have had any key set.
  • Assign the key of the data.table which has a key to the_key.
  • Set the key of the other data.table using the_key.

Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

# Check for keys
___
___

# Find the key
the_key <- ___

# Set the key for the other data.table
___(___, ___)
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