{"id":9635,"date":"2022-09-19T23:01:05","date_gmt":"2022-09-19T17:31:05","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/"},"modified":"2022-09-19T23:01:05","modified_gmt":"2022-09-19T17:31:05","slug":"solved-how-to-select-certain-character-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/","title":{"rendered":"[Solved] How to select certain character? [closed]"},"content":{"rendered":"

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Please add a reproducible sample next time. Below is the sample input based on the data from the given link. <\/p>\n

Input: <\/p>\n

url <- c(\"\/history\/apollo\/\",    \"\/shuttle\/countdown\/\",  \"\/shuttle\/missions\/sts-73\/mission-sts-73.html\", \n         \"\/shuttle\/countdown\/liftoff.html\", \"\/shuttle\/missions\/sts-73\/sts-73-patch-small.gif\",  \n         \"\/images\/NASA-logosmall.gif\",  \"\/shuttle\/countdown\/video\/livevideo.gif\",   \n         \"\/shuttle\/countdown\/countdown.html\",   \"\/shuttle\/countdown\/\",  \"https:\/\/stackoverflow.com\/\",    \"\/shuttle\/countdown\/count.gif\", \n         \"\/images\/NASA-logosmall.gif\",  \"\/images\/KSC-logosmall.gif\",    \"\/shuttle\/countdown\/count.gif\", \n         \"\/images\/NASA-logosmall.gif\",  \"\/images\/KSC-logosmall.gif\",    \"\/images\/ksclogo-medium.gif\",   \n         \"\/images\/launch-logo.gif\", \"\/facts\/about_ksc.html\",    \"\/shuttle\/missions\/sts-71\/images\/KSC-95EC-0916.jpg\")\n\nreturn_code <- c(200, 200, 200, 304, 200, 304, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 304, 200, 200, 200)\n\ndf <- tibble(url, return_code)\ndf\n\n# A tibble: 20 x 2\n   url                                               return_code\n   <chr>                                                   <dbl>\n 1 \/history\/apollo\/                                         200.\n 2 \/shuttle\/countdown\/                                      200.\n 3 \/shuttle\/missions\/sts-73\/mission-sts-73.html             200.\n 4 \/shuttle\/countdown\/liftoff.html                          304.\n 5 \/shuttle\/missions\/sts-73\/sts-73-p=atch-small.gif         200.\n 6 \/images\/NASA-logosmall.gif                               304.\n 7 \/shuttle\/countdown\/video\/livevideo.gif                   200.\n 8 \/shuttle\/countdown\/countdown.html                        200.\n 9 \/shuttle\/countdown\/                                      200.\n10 \/                                                        200.\n11 \/shuttle\/countdown\/count.gif                             200.\n12 \/images\/NASA-logosmall.gif                               200.\n13 \/images\/KSC-logosmall.gif                                200.\n14 \/shuttle\/countdown\/count.gif                             200.\n15 \/images\/NASA-logosmall.gif                               200.\n16 \/images\/KSC-logosmall.gif                                200.\n17 \/images\/ksclogo-medium.gif                               304.\n18 \/images\/launch-logo.gif                                  200.\n19 \/facts\/about_ksc.html                                    200.\n20 \/shuttle\/missions\/sts-71\/images\/KSC-95EC-0916.jpg        200.\n<\/code><\/pre>\n
Method:  <\/p>\n
library(tidyverse)\n\n# Custom function to select the last vector from the str_split() output \nfind_gif <- function(myDF) {\n  map_chr(myDF, ~(.x %>% last()))\n}\n\ndf2 <- df %>% \n  filter(grepl(\".gif$\", url), return_code == 200) %>% \n  mutate(url2 = find_gif(str_split(url, \"[\/]\"))) %>% \n  select(url2, return_code)\n<\/code><\/pre>\n
Output:  <\/p>\n
df2\n# A tibble: 9 x 2\n  url2                    return_code\n  <chr>                         <dbl>\n1 sts-73-patch-small.gif         200.\n2 livevideo.gif                  200.\n3 count.gif                      200.\n4 NASA-logosmall.gif             200.\n5 KSC-logosmall.gif              200.\n6 count.gif                      200.\n7 NASA-logosmall.gif             200.\n8 KSC-logosmall.gif              200.\n9 launch-logo.gif                200.\n<\/code><\/pre>\n
If you want only the unique values, use the unique()<\/code> function.<\/p>\n
df2 %>% select(url2) %>% unique()\n# A tibble: 6 x 1\n  url2                  \n  <chr>                 \n1 sts-73-patch-small.gif\n2 livevideo.gif         \n3 count.gif             \n4 NASA-logosmall.gif    \n5 KSC-logosmall.gif     \n6 launch-logo.gif \n<\/code><\/pre>\n<\/p><\/div>\n
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            <\/span> <\/p><\/div>\n<\/div>\n
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solved How to select certain character? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] Please add a reproducible sample next time. Below is the sample input based on the data from the given link. Input: url <- c(“\/history\/apollo\/”, “\/shuttle\/countdown\/”, “\/shuttle\/missions\/sts-73\/mission-sts-73.html”, “\/shuttle\/countdown\/liftoff.html”, “\/shuttle\/missions\/sts-73\/sts-73-patch-small.gif”, “\/images\/NASA-logosmall.gif”, “\/shuttle\/countdown\/video\/livevideo.gif”, “\/shuttle\/countdown\/countdown.html”, “\/shuttle\/countdown\/”, “https:\/\/stackoverflow.com\/”, “\/shuttle\/countdown\/count.gif”, “\/images\/NASA-logosmall.gif”, “\/images\/KSC-logosmall.gif”, “\/shuttle\/countdown\/count.gif”, “\/images\/NASA-logosmall.gif”, “\/images\/KSC-logosmall.gif”, “\/images\/ksclogo-medium.gif”, “\/images\/launch-logo.gif”, “\/facts\/about_ksc.html”, “\/shuttle\/missions\/sts-71\/images\/KSC-95EC-0916.jpg”) return_code <- c(200, 200, 200, 304, 200, 304, 200, 200, 200, … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[2499,321,362],"class_list":["post-9635","post","type-post","status-publish","format-standard","hentry","category-solved","tag-gsub","tag-r","tag-string"],"yoast_head":"\n[Solved] How to select certain character? [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to select certain character? [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Please add a reproducible sample next time. Below is the sample input based on the data from the given link. Input: url <- c("\/history\/apollo\/", "\/shuttle\/countdown\/", "\/shuttle\/missions\/sts-73\/mission-sts-73.html", "\/shuttle\/countdown\/liftoff.html", "\/shuttle\/missions\/sts-73\/sts-73-patch-small.gif", "\/images\/NASA-logosmall.gif", "\/shuttle\/countdown\/video\/livevideo.gif", "\/shuttle\/countdown\/countdown.html", "\/shuttle\/countdown\/", "https:\/\/stackoverflow.com\/", "\/shuttle\/countdown\/count.gif", "\/images\/NASA-logosmall.gif", "\/images\/KSC-logosmall.gif", "\/shuttle\/countdown\/count.gif", "\/images\/NASA-logosmall.gif", "\/images\/KSC-logosmall.gif", "\/images\/ksclogo-medium.gif", "\/images\/launch-logo.gif", "\/facts\/about_ksc.html", "\/shuttle\/missions\/sts-71\/images\/KSC-95EC-0916.jpg") return_code <- c(200, 200, 200, 304, 200, 304, 200, 200, 200, ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-19T17:31:05+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] How to select certain character? 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[closed] - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] How to select certain character? [closed] - JassWeb","og_description":"[ad_1] Please add a reproducible sample next time. Below is the sample input based on the data from the given link. Input: url <- c(\"\/history\/apollo\/\", \"\/shuttle\/countdown\/\", \"\/shuttle\/missions\/sts-73\/mission-sts-73.html\", \"\/shuttle\/countdown\/liftoff.html\", \"\/shuttle\/missions\/sts-73\/sts-73-patch-small.gif\", \"\/images\/NASA-logosmall.gif\", \"\/shuttle\/countdown\/video\/livevideo.gif\", \"\/shuttle\/countdown\/countdown.html\", \"\/shuttle\/countdown\/\", \"https:\/\/stackoverflow.com\/\", \"\/shuttle\/countdown\/count.gif\", \"\/images\/NASA-logosmall.gif\", \"\/images\/KSC-logosmall.gif\", \"\/shuttle\/countdown\/count.gif\", \"\/images\/NASA-logosmall.gif\", \"\/images\/KSC-logosmall.gif\", \"\/images\/ksclogo-medium.gif\", \"\/images\/launch-logo.gif\", \"\/facts\/about_ksc.html\", \"\/shuttle\/missions\/sts-71\/images\/KSC-95EC-0916.jpg\") return_code <- c(200, 200, 200, 304, 200, 304, 200, 200, 200, ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/","og_site_name":"JassWeb","article_published_time":"2022-09-19T17:31:05+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-select-certain-character-closed\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] How to select certain character? 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