Word count

Sometimes it can be useful to get the word length of a field, especially for models designed to personalize different types of content. You can use the word_count feature extractor to get the length of a string field with the following config:

- name: title_length
  type: word_count
  scope: item
  field: item.title // must be a string

Relative number

Update, v0.7.x: relative_number is deprecated and removed. Both XGBoost and LightGBM natively support this out of the box for all numeric features, so please use the number feature.

List size

Counts the number of items in a string or numerical list. Example:

- name: toggled_filters_count
  type: list_size
  field: filters
  source: item

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