fif <- function(what, where=".", in_files="\\.[Rr]$", recursive = TRUE,
ignore.case = TRUE) {
fils <- list.files(path = where, pattern = in_files, recursive = recursive)
found <- FALSE
file_cmd <- Sys.which("file")
for (fil in fils) {
if (nchar(file_cmd) > 0) {
ftype <- system2(file_cmd, fil, TRUE)
if (!grepl("text", ftype)[1]) next
}
contents <- readLines(fil)
res <- grepl(what, contents, ignore.case = ignore.case)
res <- which(res)
if (length(res) > 0) {
found <- TRUE
cat(sprintf("%s\n", fil), sep="")
cat(sprintf(" % 4s: %s\n", res, contents[res]), sep="")
}
}
if (!found) message("(No results found)")
}
Running
> fif("map")
在我的顶层控制台中gdns
包结果为:
R/dkim.r
11: #' purrr::map_df(dkim_rec, .parse_dkim)
21: #' purrr::map_df(~{
R/gdns-package.r
29: #' @importFrom purrr safely map map_df %||% %>%
R/gdns.r
102: results <- map(entities, gdns::query, type=type, edns_client_subnet=edns_client_subnet)
103: map_df(results, "Answer")
R/spf.r
11: purrr::map(spf_rec, .split_spf)
76: purrr::map(split_spf(spf_rec), function(x) {
84: purrr::map(split_spf(spf_rec), function(x) {
92: purrr::map(split_spf(spf_rec), function(x) {
100: purrr::map(split_spf(spf_rec), function(x) {
108: purrr::map(split_spf(spf_rec), function(x) {
在控制台中。
如果没有找到匹配的文件what
它告诉你:
> fif("python")
(No results found)
将该功能保留在您的~/.Rprofile
它将出现在所有非普通 R 会话中。