MarkLogic 9 Product Documentation

WordsSearch.reduce

WordsSearch.reduce(
   reducer as function,
   seed as anyValue
) as WordsSearch

Summary

Specifies a function similar to Array.prototype.reduce() to apply to each word within the slice.

Usage Notes

Your custom reducer function should have the following signature:

function (prev, current, index, state)

Where the parameters have the following contents:

prev

The value returned by the previous call, or the seed value on the first call.

current

The current word.

index

The number of the current word.

state

A state object with a boolean-valued isLast> property that indicated the last call. You can set it to true to prematurely halt the reduction.

The return from the last call becomes the final reduced result.

You cannot use this method in conjunction with WordsSearch.map.

See Also

• Using a Custom Reducer in the Search Developer's Guide
• Querying Values in a Word Lexicon in the Search Developer's Guide