Python's html.unescape equivalent in Clojure

Question

In Python3, we have a function like this

Python 3.8.5 (v3.8.5:580fbb018f, Jul 20 2020, 12:11:27) 

>>> from html import unescape

>>> unescaped = unescape("here is &#39; apostrophe")

>>> print(unescaped)

here is ' apostrophe
>>>

I'm having trouble finding an equivalent in Clojure. Does a base library function exist.

I wouldn't expect it to exist in the Clojure standard library; it smells like something already covered by Java, JavaScript, or otherwise platform-specific libraries that Clojure provides access to, where there would be very little benefit to reimplementing the wheel. — Charles Duffy
– Charles Duffy, Commented Oct 23, 2020 at 18:17

Alan Thompson · Accepted Answer · 2020-10-23 19:27:37Z

2

The library apache.commons.text can do this job:

(ns tst.demo.core
  (:use tupelo.core tupelo.test)
  (:import
    [org.apache.commons.text StringEscapeUtils]))

(dotest
  (let [hng      "hi & goodbye"
        encoded  (StringEscapeUtils/escapeHtml4 hng)]
    (is= encoded "hi &amp; goodbye")
    (is= hng (StringEscapeUtils/unescapeHtml4 encoded))))

The Apache site has the full API docs.

answered Oct 23, 2020 at 19:27

Alan Thompson

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