@klaus.azesberger you may want to try adding expound to your project; it'll make those giant spec errors much more readable. https://github.com/bhb/expound

Hello everybody, a beginner question regarding clojurescript tooling: What is the difference between figwheel and figwheel-main? Which one would you recommend? Thanks in advance!

mind blank: I got a function that initializes a certain specialized data structure, and a function that adds an element to it. Any reason not to bundle them into an object? or what would be the most idiomatic way to provide users with an easy way to use instances of this duo?

Thanks @donaldball anyway, is there a purely functional counterpart to this?

I guess not; just making all those functions that work on my specialized data structure sit in their own namespace, leaving it to users to abuse them on the wrong data types

Question: Is there a way I can pattern match on map keys? For example, say I have a map with many different keys and I'd like to filter out some of those based on their key-name. Something along the lines of (dissoc my-map (regex that matches on key name))

Another way to put it is that I want to filter out any keys that may contain the word password or phrase pass.

I would do this via reduce-kv - there's no solution that isn't a linear scan on all keys

But is there a way I can check if a key contains a word/phrase?

what's the type of the key? if it's a keyword name gives you a string not including (optional) namespace

str gives you the actual string representation of course

(filter (fn [[key val]] (= nil (re-find #"pass" (str key)))) my-map)

I was able to get it done using that. But I don't understand why I get a vector back?

If the input is this {:example "value-a" :sql-pass "abc123" :my-password "hunter2"}

The result I get is ([:example "value-a"])

Nevermind. That is actually expected

you can use into with the filter transducer here

(into {} (filter f?) m)

where f? is your fn above

Yea thats what I ended up doing

note that m is outside the filter call

hmmm

the other way works too, but filter's transducer is preferable in cases like this where it can be used

Why is it preferable?

it directly filters the values going into the hash-map, instead of making a lazy-seq and then putting that into a hash-map

also (filter f) can be composed directly with other transformations

but maybe you don't need this in #beginners 😄

:thumbsup: :thumbsup:

How will this code look like on Clojure

const func  = (x, y) => f => f(x, y)

(defn func [x y] (fn [f] (f x y)))

that fn could equivalently be #(% x y)

Hello everyone, I need help in printing the cell data of column A and Column B in REPL. How can I print it? This is what I coded till now: (defn sheet "Return all the sheet [sheet] from file [file-path]" [file-path sheet-name] (->> (load-workbook file-path) (select-sheet sheet-name) (select-columns {:A :col1, :B :col2}) ) )

@rachna.rajput99 If you’d like a nice tabular printout clojure.pprint/print-table is nice.