如何访问 tibble 列表以检查 "UTF-8" 和运行是否导入 R

Question

目标： 在 import 和 rbind 之前检查文件列表是否具有相同的编码，如果不相同停止运行

# files list & check encoding
FL_PATH <- list.files(path,pattern = "*.csv",full.name = T)
library(readr)
lapply(FL_PATH,guess_encoding)

# if there is "UTF-8" , STOP RUN , if "Shift_JIS" , RUN the next scripts below :

# import
library(rio)
DT <- rbindlist(lapply(FL_PATH ,import,sep=",",setclass = "data.table"))

# OVER 500 rows to run if the files are same encoding to rbind
DT[,"NEW_COL":="A"]
DT[,"NEW_COL_2":="B"]
.....

# result of --lapply(FL_PATH,guess_encoding)
> lapply(FL_PATH,guess_encoding)
[[1]]
# A tibble: 3 x 2
  encoding  confidence
  <chr>          <dbl>
1 Shift_JIS       0.8 
2 GB18030         0.76
3 Big5            0.46

[[2]]
# A tibble: 3 x 2
  encoding  confidence
  <chr>          <dbl>
1 GB18030         0.82
2 UTF-8       0.8 
3 Big5            0.44

问题1：如何访问lapply readr的结果变量检测 UTF-8 和 STOP（必须修改 R 外的编码，如果 UTF-8 存在吗？）
问题2:如何连接大量正常处理脚本 "if & STOP run" ?

Answer 1

首先，得到最可能的编码：

enc <- sapply(FL_PATH,function(x) guess_encoding(x)$encoding[1])

然后，如果有任何文件是UTF-8，则停止执行。

if(any(grepl('UTF-8',enc)))
  stop('UTF-8 present') # This will stop with an error if true
# Now, read files and rbind
dlist <- lapply(FL_PATH,read_csv)
DT <- rbindlist(dlist)

如何访问 tibble 列表以检查 "UTF-8" 和运行是否导入 R

How to access a list of tibble to check whether "UTF-8" and run import R

r

utf-8

import

tibble

readr

如何访问 tibble 列表以检查 "UTF-8" 和 运行 是否导入 R

How to access a list of tibble to check whether "UTF-8" and run import R

r

utf-8

import

tibble

readr

如何访问 tibble 列表以检查 "UTF-8" 和运行是否导入 R