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#' Print available constraint methods
#'
#' Prints the constraint handling methods available in the MOEADr package
#'
#' This routine prints the names of the constraint handling methods available in
#' the MOEADr package, to be used as the \code{constraint$name} parameter in the
#' \code{moead(...)} call. Instructions for obtaining more info on each
#' operator are also returned.
#'
#' @return Formatted data frame containing reference name (for
#' \code{constraint$name}) and instructions for More Info about each method.
#'
#' @examples
#' get_constraint_methods()
#'
#' @export
get_constraint_methods <- function(){
# Get only functions with "constraint_" in the name
con.list <- ls("package:MOEADr")
con.list <- con.list[grep(pattern = "constraint_", con.list)]
con.list <- con.list[-which(con.list == "get_constraint_methods")]
con.list.name <- gsub("constraint_", "", con.list)
output <- data.frame(name = con.list.name,
`More Info` = paste0("'?", con.list, "'"))
name.width <- max(sapply(as.character(output$More.Info), nchar))
names(output) <- format(names(output),
width = name.width,
justify = "centre")
format(output, width = name.width, justify = "centre")
}
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