If I have a map like this:
(def foo {:bar "foobar"})
And I've been passed the key :bar as a string (i.e. ":bar")
I want to be able to access the value from the map doing something like
(get foo (symbol ":bar"))
which I thought would work, because (symbol ":bar") is :bar ... but it just returns nil
If you need to make from string ":asd" a keyword :asd you do something like this:
> (= (read-string ":asd") (keyword (subs ":asd" 1)) :asd)
true
Your code with (symbol ":asd") just print itself like :asd but is actually a symbol, not keyword.
":asd" to begin with. Where did that string come from? More likely, you can address this problem closer to its source, by generating a more reasonable string input in the first place.(name ":asd") before it got stored ... so I could just used (keyword "asd") on the string. Thanks for the advice.If your string really is ":bar", just do a replace to remove the colon and then use keyword to convert it to a keyword.
(def foo {:bar "foobar"})
(foo (keyword (clojure.string/replace ":bar" #"\:" ""))) => "foobar"
This works:
((read-string ":bar") {:bar "foobar"})
=> "foobar"
Or of course:
(get {:bar "foobar"} (read-string ":bar"))
(keyword "bar")instead?":bar"in the string not"bar"