RC Logr 20190414 135141
Sunday, 14 Apr, 2019
Given a json file, used say for a search index, you can easily use «jq» from stedolan to extract what you need from it. 👻 It is as simple as piping the json to
jq, and using its powerful filtering to extract what you need. I generate the search index for this site in json, because that is what lunr requires, but it doubles as a source for the info I use to tweet about a new post.
Given a json like this:
… I use something like this to extract what I want to tweet:
That pipes the index json file to
jq, gets the 0th (first and latest) node, then pipes it extracting and concatenating the values of the
.ref keys, limiting the
.content value to 75 characters. With
jq, concatenation to string literals is done with a plus sign. The statement within the single quotes is where the work is done, and it can be multiple filters with pipes between.