I've been working on making a package for the Twitter API. To build
methods, I've been copying code between functions, so that every function
nearly has the same pattern:
#No default argument
function get_help_configuration(; options = Dict())
endpoint = "https://api.twitter.com/1.1/help/configuration.json";
#URI encode values for all keys in Dict
encodeURI(options)
#Build query string
query_str = Requests.format_query_str(options)
#Build oauth_header
oauth_header_val = oauthheader("GET", endpoint, options)
return Requests.get(URI("$(endpoint)?$query_str");
headers = {"Content-Type" =>
"application/x-www-form-urlencoded",
"Authorization" => oauth_header_val,
"Connection" => "close",
"Accept" => "*/*"})
end
#One default argument
function get_direct_messages(count::Int; options = Dict())
endpoint = "https://api.twitter.com/1.1/direct_messages.json";
#Add status into options Dict
options["count"] = "$count"
#URI encode values for all keys in Dict
encodeURI(options)
#Build query string
query_str = Requests.format_query_str(options)
#Build oauth_header
oauth_header_val = oauthheader("GET", endpoint, options)
return Requests.get(URI("$(endpoint)?$query_str");
headers = {"Content-Type" =>
"application/x-www-form-urlencoded",
"Authorization" => oauth_header_val,
"Connection" => "close",
"Accept" => "*/*"})
end
The only difference between the two function calls is whether I've
specified an argument for the most common option. Each function call has
either of these two patterns (which other than the first argument, are the
same themselves).
What's the best way to avoid repetition: a macro, a function, something
else? The only inputs are endpoint (URI) and the first argument (values
like count::Int, screen_name::String), which needs to be substituted into
the area where I add the key to the Dict.
