How to filter with embedded conversion?

Sat, 20 Feb 2021 22:34:18 +0000

I have some data, which I'm able to do a simple filter on:

(defn get-posts-body 
  []
  (:body @(client/get posts-url api-options)))

(defn get-books
  []
  (parse-string (get-books-body) true))

(defn get-non-fiction-books
  []
  (filter #(if (= "non-fiction" (:category %)) %) (get-books)))

This works well.

I have another data source, posts, which I want to convert a field to a DateTime type and do a comparison on as well. Though it's not working:

(defonce today (.withTimeAtStartOfDay (t/now)))

(defn get-posts-body 
  []
  (:body @(client/get posts-url api-options)))

(defn get-posts
  []
  (parse-string (get-posts-body) true))

(def get-posts-viewed-today
  []
  (filter #(if (>= (f/parse :date-time (:last_viewed_at %)) today) %) (get-posts)))

I want all of the Maps which have a last_viewed_at DateTime >= to today.

I'm trying to convert the String last_viewed_at to a DateTime and compare with today.

It doesn't compile though:

Syntax error compiling def at (clojure_json_test/core.clj:46:1). Too
many arguments to def

Incidentially, I'm using:

(:require [clj-time.core :as t]
          [clj-time.format :as f]
          ;; ... )

Clojure Q&A - Recent questions tagged conversion

How to filter with embedded conversion?