解码R中的URL字符串向量

Question

假设您有一个包含URL编码字符串的原子向量。

例如：

urlencoded<-c("im%20looking%20for%20uncle","im%20looking%20for%20sister") 

有没有办法解码向量中的每个元素，返回与常规文本相同长度的向量？

换句话说，输出应该是：

c("im looking for uncle","im looking for sister")

基础R中的URLdecode没有矢量化，而且速度很慢。 R之外有很多实用程序可以快速解码URL编码的字符串，但我在R中找不到任何好的实用程序。

Answer 1

您可以将函数应用于sapply的矢量。它将返回结果向量：

> urlencoded <- c("im%20looking%20for%20uncle", "im%20looking%20for%20sister")
> sapply(urlencoded, URLdecode, USE.NAMES = FALSE)
[1] "im looking for uncle"  "im looking for sister"

Answer 2

对于那些还不知道的人来说，urltools包含了矢量化url_decode和url_encode：

library(urltools)

urlencoded <- c("im%20looking%20for%20uncle","im%20looking%20for%20sister")
url_decode(urlencoded)
# [1] "im looking for uncle"  "im looking for sister"

url_encode(c("im looking for uncle", "im looking for sister"))
# [1] "im%20looking%20for%20uncle"  "im%20looking%20for%20sister"