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Mention source(local=TRUE)

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Winston Chang
2013-01-27 15:55:44 -06:00
parent 865333a867
commit 0daa64648a
1 changed files with 7 additions and 4 deletions
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_includes/tutorial/scoping.md
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@@ -94,23 +94,26 @@ In practice, there aren't many times where it's necessary to share variables bet
### Scope for included R files
If you want to split the server or ui code into multiple files, you can use `source()` to load each file. You can think of `source()` as putting the code in-line, so the code from the sourced files will receive the same scope as if you copied and pasted the text right there.
If you want to split the server or ui code into multiple files, you can use `source(local=TRUE)` to load each file. You can think of this as putting the code in-line, so the code from the sourced files will receive the same scope as if you copied and pasted the text right there.
This example `server.R` file shows how sourced files will be scoped:
{% highlight r %}
# Objects in this file are shared across all sessions
source('all_sessions.R')
source('all_sessions.R', local=TRUE)
shinyServer(function(input, output) {
# Objects in this file are defined in each session
source('each_session.R')
source('each_session.R', local=TRUE)
output$text <- reactiveText(function() {
# Objects in this file are defined each time this function is called
source('each_call.R')
source('each_call.R', local=TRUE)
# ...
})
})
If you use the default value of `local=FALSE`, then the file will be sourced in the global environment.
{% endhighlight %}