mapContext.key

Property Description

The key to be processed during the map stage.

If the input type is an array, the key is the index of the element.
If the input type is an object, the key is the key in the object.
If the input type is a result set, the key is the internal ID of the result. If the search result has no internal ID, the key is the index of the search result.

Note:

Each key cannot exceed 4000 bytes.

Type

string

Since

2015.2

Syntax

The following code snippet shows the syntax for this member. It is not a functional example. For a complete script example, see Map/Reduce Script Samples.

          // Add additional code 
...
     
    context.write({
        key: context.value[i], 
        value: 1 
    }); 
 ...
// Add additional code

Syntax

Related Topics