mapContext

Object Description

Object that contains:

The key-value pairs to process during the map stage.
Logic that lets you save data to pass to the reduce stage.
Other properties you can use within the map function.

This object includes the following properties and methods:

mapContext.isRestarted
mapContext.executionNo
mapContext.errors
mapContext.key
mapContext.value
mapContext.write(options)

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.

          ...
function map(context)
{
    for (var i = 0; context.value && i < context.value.length; i++)
        if (context.value[i] !=== ' ' && !PUNCTUATION_REGEXP.test(context.value[i]))
            {
                context.write({
                    key: context.value[i], 
                    value: 1 
                }); 
            }
}
...

Syntax

Related Topics