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I use jq 1.5 in an windows 10 enviroment. I receive via api several information include different city arrays like that:
{
"cruises": [
{
"waypoint_cities": [
"Palma de Mallorca",
"Cádiz",
"Puerto del Rosario, Fuerteventura",
"Arrecife, Lanzarote",
"Arrecife, Lanzarote",
"Agadir",
"Gibraltar",
"Barcelona",
"Palma de Mallorca"
]}]}
How can i find the first and the last entry of those arrays with jq? I tried the function min/maxby but that function only delivers the entrys with the first and last in charakter of the Alphabet.
regards Timo
485
For anyone looking to do this in JSONPath syntax, you can do this with $. seats[-1:] . If you wanted to do something like get the countryid attribute nested in the last element, it would be $. seats[-1:][countryid] .
The Object. values() will return an only array of values available in an object, now we can easily get the first value from the JSON object using array 0th index.
To get first element from array, use var first = array[0]; To get Name from it, use first.Name .
jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed , awk , grep and friends let you play with text. jq is written in portable C, and it has zero runtime dependencies.
Here is a solution using first and last
.cruises[].waypoint_cities | first, last
Output
"Palma de Mallorca"
"Palma de Mallorca"
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