Jq on traviscj/blog

sfpark api

Tue, 24 Apr 2018 16:29:39 +0000

I recently came to learn of the SFpark API, which lets one make queries like:

LAT=37.787702
LONG=-122.407796
curl "http://api.sfpark.org/sfpark/rest/availabilityservice?lat=${LAT}&long=${LONG}&radius=0.25&uom=mile&response=json" | pbcopy
pbpaste | jq '.AVL[] | select (.TYPE | contains("OFF"))'

and get a response including records like:

{
  "TYPE": "OFF",
  "OSPID": "950",
  "NAME": "Union Square Garage",
  "DESC": "333 Post Street",
  "INTER": "Geary between Stockton & Powell",
  "TEL": "(415) 397-0631",
  "OPHRS": {
    "OPS": {
      "FROM": "7 Days/Wk",
      "BEG": "24 Hrs/Day"
    }
  },
  "OCC": "381",
  "OPER": "670",
  "PTS": "1",
  "LOC": "-122.407447946,37.7876789151"
}

Pretty cool!

toy/life data models

Wed, 19 Apr 2017 00:00:00 +0000

I’ve been experimenting a lot with some kinda “toy” data models based on random things that I wish there was a database to query, but isn’t. For example:

What was my average arrival time this week?
How much of my equity has vested before a certain date?
When was the last time we had spaghetti for dinner?

I’ve been doing this with flat JSON files. This is a bit of an odd choice for me; I actually love schematizing data models in protobuf and MySQL and designing proper indices for the data models I work on during work hours.

build_json.sh

Wed, 19 Aug 2015 00:00:00 +0000

This might seem silly, but I’ve beeing playing with some json.sh scripts that build legitimate json bodies and are easily filled into a shell script variable as needed.

The basic driving idea was that there are lots of slick ways to pull data out of JSON(either by programming something with python’s json or running a command line tool like jq or whatever), but not as many friendly ways to build some JSON out of a given token or whatever. Often, you have a list of identifiers and you need to build a bunch of JSON blobs from that list.