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edges case is broken
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| #install.packages("httr") | |
| #install.packages("jsonlite") | |
| #install.packages("tidyverse") | |
| #install.packages("stringr") | |
| require(httr) | |
| require(jsonlite) | |
| require(tidyverse) | |
| require(stringr) | |
| base <- "https://en.wikipedia.org/w/api.php?action=query&format=json&prop=linkshere&lhlimit=500" | |
| articles <- c("Maximal and minimal elements", "Maxima and minima") | |
| titles <- function(v){paste("&titles=", v, sep="")} | |
| ids <- function(v){paste("&pageids=", v, sep="")} | |
| query <- function(v){paste(base,v, sep="")} | |
| getLh <- function(v){as.data.frame(fromJSON(content(GET(v),"text"), flatten=FALSE))} | |
| map(articles, URLencode) %>% | |
| map(titles) %>% | |
| map(query) %>% | |
| map(getLh) %>% | |
| map(~select(.x, c(4,5,7,8))) %>% | |
| map(~as_tibble(.x, .name_repair="minimal")) -> tibs | |
| map(tibs, function(v){filter(v, complete.cases(v))}) %>% # Convenient NAs in data. | |
| map(~select(.x, c(2))) %>% | |
| map(flatten_chr) %>% | |
| map(ids) %>% | |
| map(as.list) %>% | |
| map(query) %>% | |
| map(as.list) -> urls | |
| map(urls, function(v){v %>% map(getLh)}) -> df1 | |
| #edges <- function(v){ v %>% map(~select(.x,c(4,7)))}; df <- map(df1,edges) #broken | |
| #edges <- function(v){ v %>% map(~pluck(.x,7))}; df <- map(df1,edges) #works but single-column | |
| e <- function(v){select(v,c(4,7))}; df <- map(df1[[1]],e) |
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