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> ### > attach(NULL, name = "CheckExEnv") > assign(".CheckExEnv", as.environment(2), pos = length(search())) # base > ## add some hooks to label plot pages for base and grid graphics > setHook("plot.new", ".newplot.hook") > setHook("persp", ".newplot.hook") > setHook("grid.newpage", ".gridplot.hook") > > assign("cleanEx", + function(env = .GlobalEnv) { + rm(list = ls(envir = env, all.names = TRUE), envir = env) + RNGkind("default", "default") + set.seed(1) + options(warn = 1) + delayedAssign("T", stop("T used instead of TRUE"), + assign.env = .CheckExEnv) + delayedAssign("F", stop("F used instead of FALSE"), + assign.env = .CheckExEnv) + sch <- search() + newitems <- sch[! sch %in% .oldSearch] + for(item in rev(newitems)) + eval(substitute(detach(item), list(item=item))) + missitems <- .oldSearch[! .oldSearch %in% sch] + if(length(missitems)) + warning("items ", paste(missitems, collapse=", "), + " have been removed from the search path") + }, + env = .CheckExEnv) > assign("..nameEx", "__{must remake R-ex/*.R}__", env = .CheckExEnv) # for now > assign("ptime", proc.time(), env = .CheckExEnv) > grDevices::postscript("bitops-Examples.ps") > assign("par.postscript", graphics::par(no.readonly = TRUE), env = .CheckExEnv) > options(contrasts = c(unordered = "contr.treatment", ordered = "contr.poly")) > options(warn = 1) > library('bitops') > > assign(".oldSearch", search(), env = .CheckExEnv) > assign(".oldNS", loadedNamespaces(), env = .CheckExEnv) > cleanEx(); ..nameEx <- "bitAnd" > > ### * bitAnd > > flush(stderr()); flush(stdout()) > > ### Name: bitAnd > ### Title: Bitwise And, Or and Xor operations > ### Aliases: bitAnd bitOr bitXor > ### Keywords: arith utilities > > ### ** Examples > > bitAnd(15,7) == 7 [1] TRUE > bitOr(15,7) == 15 [1] TRUE > bitXor(15,7) == 8 [1] TRUE > bitOr(-1,0) == 4294967295 [1] TRUE > > > > > cleanEx(); ..nameEx <- "bitFlip" > > ### * bitFlip > > flush(stderr()); flush(stdout()) > > ### Name: bitFlip > ### Title: Binary Flip (Not) Operator > ### Aliases: bitFlip > ### Keywords: arith utilities > > ### ** Examples > > bitFlip(-1) == 0 [1] TRUE > bitFlip(0) == 4294967295 [1] TRUE > bitFlip(0,bitWidth=8) == 255 [1] TRUE > > > > cleanEx(); ..nameEx <- "bitShiftL" > > ### * bitShiftL > > flush(stderr()); flush(stdout()) > > ### Name: bitShiftL > ### Title: Bitwise Shift Operator (to the Left or Right) > ### Aliases: bitShiftL bitShiftR > ### Keywords: arith utilities > > ### ** Examples > > bitShiftR(-1,1) == 2147483647 [1] TRUE > bitShiftL(2147483647,1) == 4294967294 [1] TRUE > bitShiftL(-1,1) == 4294967294 [1] TRUE > > > > > cleanEx(); ..nameEx <- "cksum" > > ### * cksum > > flush(stderr()); flush(stdout()) > > ### Name: cksum > ### Title: Compute Check Sum > ### Aliases: cksum > ### Keywords: arith utilities > > ### ** Examples > > b <- "I would rather have a bottle in front of me than frontal lobotomy\n" > cksum(b) == 1342168430 ## -> TRUE [1] TRUE > > > > ### *