| nwsIFetch {nws} | R Documentation |
Create a function that acts as a destructive iterator over the values of the specified variable.
## S4 method for signature 'netWorkSpace': nwsIFetch(.Object, xName)
.Object |
a netWorkSpace class object. |
xName |
character string specifying name of the variable to be fetched |
The iterator function returned by the nwsIFetch method takes
no arguments, and works just like the nwsFetch method, specified
with the same arguments that were passed to nwsIFetch method.
Note that the nwsIFind and nwsIFindTry methods are much more useful,
since they provide the only way to iterate over values of a variable
non-destructively.
The nwsIFetch and nwsIFetchTry methods are provided for completeness.
## Not run:
ws <- netWorkSpace('nws example')
nwsStore(ws, 'x', 10)
it <- nwsIFetch(ws, 'x')
it() # returns the value 10
it() # blocks until another process stores a value in the variable
## End(Not run)