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发帖数: 579 | 1 【 以下文字转载自 Statistics 讨论区 】
发信人: light009 (light009), 信区: Statistics
标 题: a hash embedded with another hash in R
发信站: BBS 未名空间站 (Fri Apr 11 15:56:40 2014, 美东)
This question is related to my previous question.
I need to design a hash that is embedded with another hash in R in Rstudio
on Win 7.
library(hash)
myf <- function()
{
h1 <- hash()
if (!has.key("first", h1))
{
list1 <- list()
h1.son<- hash()
h1.son["first_son"] <- list1
h1["first"] <- h1.son
}
# second check
if(!has.key("first_son", h1["first"]))
{
list1 <- list()
h1.son<- hash()
h1.son["first_son"] <- list1
h1["first"] <- h1.son
}
}
myf()
Why in "second check ", h1["first"] still has NO key of "first_son", which
has been added before.
Thanks ! |
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