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# A utility function that strips a named argument 'raw' from the list.
# This function returns a list with two items:
# 1. The stripped list without the raw=whatever entry
# 2. The value of the named raw=whatever entry
#
# Use this with functions that have variable length arument lists.
.redisStripRawArg <- function(List)
{
ir <- which(names(List) %in% "raw")
raw <- c()
if(length(ir)>0)
{
raw <- List[[ir]]
List <- List[-ir]
}
list(List=List, raw=raw)
}
# Generic set operation
.redisSetOp <- function(cmd, keys, ...)
{
L <- .redisStripRawArg(list(...))
sets <- c(as.list(keys),L$List)
call <- lapply(c(list(cmd),sets),charToRaw)
if(!is.null(L$raw)) call <- c(call,raw=L$raw)
do.call(".redisCmd", call)
}
redisSInter <- function(keys, ...)
{
.redisSetOp("SINTER", keys, ...)
}
redisSUnion <- function(keys, ...)
{
.redisSetOp("SUNION", keys, ...)
}
redisSUnionStore <- function(dest, keys, ...)
{
.redisSetOp("SUNIONSTORE", keys, ...)
}
redisSInterStore <- function(dest, keys, ...)
{
.redisSetOp("SINTERSTORE", keys, ...)
}
redisSDiff <- function(keys, ...)
{
.redisSetOp("SDIFF", keys, ...)
}
redisSDiffStore <- function(dest, keys, ...)
{
.redisSetOp("SDIFFSTORE", keys, ...)
}
redisSIsMember <- function(set, element)
{
set <- as.character(set)
element <- as.character(element)
1 == .redisCmd(.raw('SISMEMBER'),.raw(set),.raw(element))
}
redisSRandMember <- function(set,...)
{
.redisCmd(.raw('SRANDMEMBER'),.raw(set),...)
}
redisSAdd <- function(set, element)
{
.redisCmd(.raw('SADD'),.raw(set),element)
}
redisSPop <- function(set,...)
{
.redisCmd(.raw('SPOP'),.raw(set),...)
}
redisSMembers <- function(set,...)
{
.redisCmd(.raw('SMEMBERS'),.raw(set),...)
}
redisSRem <- function(set, element)
{
.redisCmd(.raw('SREM'),.raw(set),element)
}
redisSCard <- function(set)
{
.redisCmd(.raw('SCARD'),.raw(set))
}
redisSMove <- function(setA, setB, element)
{
.redisCmd(.raw('SMOVE'),.raw(setA),.raw(setB),element)
}
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