geocode: add missing parameters to ldply call, closes #207

[dpprdan]

This ought to fix #207.

library(ggmap)
register_google(key = Sys.getenv("GOOGLE_GEOCODE_KEY"))

urlonly for multiple locations

places <- c("Houston, Texas", "Washington, DC")
geocode(places, urlonly = TRUE)
#>                                                                                                                         V1
#> 1 https://maps.googleapis.com/maps/api/geocode/json?address=Houston%2C%20Texas&key=my_google_key
#> 2 https://maps.googleapis.com/maps/api/geocode/json?address=Washington%2C%20DC&key=my_google_key

force for multiple locations

first call (so that results are cached)

geocode(places, force = FALSE)
#> Source : https://maps.googleapis.com/maps/api/geocode/json?address=Houston%2C%20Texas&key=my_google_key
#> Source : https://maps.googleapis.com/maps/api/geocode/json?address=Washington%2C%20DC&key=my_google_key
#>         lon      lat
#> 1 -95.36980 29.76043
#> 2 -77.03687 38.90719

second call

geocode(places, force = FALSE)
#>         lon      lat
#> 1 -95.36980 29.76043
#> 2 -77.03687 38.90719

Created on 2018-03-26 by the reprex package (v0.2.0).

Session info

devtools::session_info()
#> Session info -------------------------------------------------------------
#>  setting  value                       
#>  version  R version 3.4.4 (2018-03-15)
#>  system   x86_64, mingw32             
#>  ui       RTerm                       
#>  language en                          
#>  collate  German_Germany.1252         
#>  tz       Europe/Berlin               
#>  date     2018-03-26
#> Packages -----------------------------------------------------------------
#>  package     * version    date       source                            
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#>  ggmap       * 2.7.900    2018-03-26 local                             
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#>  pkgconfig     2.0.1      2017-03-21 CRAN (R 3.4.0)                    
#>  plyr          1.8.4      2016-06-08 CRAN (R 3.4.2)                    
#>  png           0.1-7      2013-12-03 CRAN (R 3.4.1)                    
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#>  RgoogleMaps   1.4.1      2016-09-18 CRAN (R 3.4.2)                    
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#>  rlang         0.2.0.9000 2018-03-07 Github (tidyverse/rlang@d2ed2cf)  
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#>  tools         3.4.4      2018-03-15 local                             
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#>  withr         2.1.2      2018-03-15 CRAN (R 3.4.4)                    
#>  yaml          2.1.18     2018-03-08 CRAN (R 3.4.4)

• [x] Did you run R CMD CHECK?
• [x] Did you run roxygen2::roxygenise(".")?

See #206 w.r.t. roxygenise

[scottmmjackson]

@dpprdan thanks for this. Do you want me to add unit tests (since this is drawn towards a bug)?

[dpprdan]

@scottmmjackson Sorry, I had not thought about this, but yeat, that would be great, because I won't have time for this the next couple of days!

[dpprdan]

I added tests. These are all based on urlonly = TRUE, otherwise one would need to call the API (which should probably better be mocked for testing via {httptest} or {webmockr}).

The tests for multiple locations depend on the result to be a (single-column) data.frame (due to ldply).