hash | R Documentation |
Preferred constructor for the hash-class
.
hash(...)
is.hash(x)
## S3 method for class 'hash'
as.list(x, all.names = FALSE, ... )
x |
A hash object. |
all.names |
a logical indicating whether to copy all values or (default) only those whose names do not begin with a dot |
... |
Additional arguments passed to the function |
hash
returns a hash object. Key-value pairs may be specified
via the ...
argument as explicity arguments keys
and
values
, as named key-value pairs, as a named vector or as implicit
key, value vectors. See examples below for each type.
Keys must be a valid R name, must be a character vector and must not be
the empty string, ""
. Values are restricted to any valid R objects.
See .set
for further details and how key-value vectors of
unequal length are interpretted.
Hashes may be accessed via the standard R accessors [
, [[
and \$
. See hash-accessors
for details.
is.hash
returns a boolean value indicating if the argument is
a hash object.
as.list.hash
coerces the hash to a list.
For hash
, an object of class hash.
Christopher Brown
.set
, hash-accessors
hash()
hash( key=letters, values=1:26 )
hash( 1:3, lapply(1:3, seq, 1 ))
hash( a=1, b=2, c=3 )
hash( c(a=1, b=2, c=3) )
hash( list(a=1,b=2,c=3) )
hash( c("foo","bar","baz"), 1:3 )
hash( c("foo","bar","baz"), lapply(1:3, seq, 1 ) )
hash( letters, 1:26 )
h <- hash( letters, 1:26 )
h$a
h$b
h[[ "a" ]]
h[ letters[1:3] ]
h$a<-100
# h[['a']]<-letters
is.hash(h)
as.list(h)
clear(h)
rm(h)
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