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document non-capturing groups (closes #143) #196

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Sep 20, 2016
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document non-capturing groups (closes #143) #196

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Expand Up @@ -47,6 +47,10 @@ variable will be anything until the next slash. For example:
r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler)
r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)

Groups can be used inside patterns, as long as they are non-capturing (?:re). For example:

r.HandleFunc("/articles/{category}/{sort:(?:asc|desc|new)}", ArticlesCategoryHandler)

The names are used to create a map of route variables which can be retrieved
calling mux.Vars():

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