List of Listings

Chapter 2. Generating synonyms

Listing 2.1. Building per-field analyzers

Listing 2.2. Adding documents to the Lucene index

Listing 2.3. Configuring synonym expansion

Listing 2.4. Separate analysis chains for indexing and search

Listing 2.5. Indexing documents

Listing 2.6. Searching for the word “plane”

Listing 2.7. Feeding synonyms from a file

Listing 2.8. Using synonyms from WordNet

Listing 2.9. DL4J word2vec example

Listing 2.10. Using the skip-gram model

Listing 2.11. Word2vec-based synonym expansion filter

Listing 2.12. Expanding pending synonyms

Listing 2.13. Fetching sentences for word2vec from the Lucene index

Listing 2.14. Reading sentences from the Lucene index

Listing 2.15. For each document, passing field values to word2vec for training

Chapter 3. From plain retrieval to text generation

Listing 3.1. Correlating queries using shared results

Listing 3.2. Correlating queries using search terms

Listing 3.3. Correlating queries using search terms and synonym expansion

Listing 3.4. Sample LSTM configuration

Listing 3.5. Configuring an LSTM with two hidden layers

Listing 3.6. One-hot-encoding a character sequence

Listing 3.7. Lucene query parser for alternative query expansion

Listing 3.8. Trying AltQueriesQueryParser using an LSTM with two hidden layers

Chapter 4. More-sensitive query suggestions

Listing 4.1. Extended neural language model with Word2Vec

Chapter 6. Document embeddings for rankings and recommendations

Listing 6.1. Searching and getting related content via MLT