foreach: foreach-ext – R documentation

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foreach-ext

foreach extension functions

Description

These functions are used to write parallel backends for the foreach package. They should not be used from normal scripts or packages that use the foreach package.

Usage

makeAccum(it)

accumulate(obj, result, tag, ...)

getResult(obj, ...)

getErrorValue(obj, ...)

getErrorIndex(obj, ...)

## S3 method for class 'iforeach'
accumulate(obj, result, tag, ...)

## S3 method for class 'iforeach'
getResult(obj, ...)

## S3 method for class 'iforeach'
getErrorValue(obj, ...)

## S3 method for class 'iforeach'
getErrorIndex(obj, ...)

## S3 method for class 'ixforeach'
accumulate(obj, result, tag, ...)

## S3 method for class 'ixforeach'
getResult(obj, ...)

## S3 method for class 'ixforeach'
getErrorValue(obj, ...)

## S3 method for class 'ixforeach'
getErrorIndex(obj, ...)

## S3 method for class 'ifilteredforeach'
accumulate(obj, result, tag, ...)

## S3 method for class 'ifilteredforeach'
getResult(obj, ...)

## S3 method for class 'ifilteredforeach'
getErrorValue(obj, ...)

## S3 method for class 'ifilteredforeach'
getErrorIndex(obj, ...)

getexports(ex, e, env, good = character(0), bad = character(0))

Arguments

`it`	foreach iterator.
`obj`	foreach iterator object.
`result`	task result to accumulate.
`tag`	tag of task result to accumulate.
`...`	unused.
`ex`	call object to analyze.
`e`	local environment of the call object.
`env`	exported environment in which call object will be evaluated.
`good`	names of symbols that are being exported.
`bad`	names of symbols that are not being exported.

Note

These functions are likely to change in future versions of the foreach package. When they become more stable, they will be documented.

foreach

Provides Foreach Looping Construct

v1.5.1

Apache License (== 2.0)

Authors

Michelle Wallig [cre], Microsoft [aut, cph], Steve Weston [aut]

Initial release