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How would you combine chunking with overlap and a maximum token limit per chunk in LangChain?

hard📝 Application Q9 of 15
LangChain - Text Splitting
How would you combine chunking with overlap and a maximum token limit per chunk in LangChain?
AUse RecursiveCharacterTextSplitter with chunk_size and chunk_overlap, then apply a token counter filter
BSet chunk_size to max tokens and ignore overlap
CUse only chunk_overlap to control token count
DUse a tokenizer before splitting text
Step-by-Step Solution
Solution:

  1. Step 1: Use RecursiveCharacterTextSplitter for chunking with overlap

    This splitter handles chunk size and overlap parameters.

  2. Step 2: Apply token counting to filter chunks

    After splitting, use a token counter to ensure chunks do not exceed token limits.

  3. Final Answer:

    Use RecursiveCharacterTextSplitter with chunk_size and chunk_overlap, then apply a token counter filter -> Option A

  4. Quick Check:

    Chunk then filter by tokens for limits [OK]
Quick Trick: Split first, then filter chunks by token count [OK]
Common Mistakes:
  • Ignoring overlap when controlling tokens
  • Setting chunk_size as tokens without filtering
  • Not applying token counting after chunking

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