jq Cheat Sheet/Array length

Return the number of items in an array.

Section: Arrays and Objects

Array length

bash
bash
echo '[1,2,3,4]' | jq 'length'
Explanation

`length` works on arrays, strings, and objects.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Related commands

Same sheet · prioritizing Arrays and Objects
Map each item to a property
Transform an array of objects into one field per item.
OpenIn sheetbashsame section
Sum array values
Add all numbers in an array.
OpenIn sheetbashsame section
Flatten nested arrays
Collapse one level or all levels of array nesting.
OpenIn sheetbashsame section
Unique values
Remove duplicate items from an array.
OpenIn sheetbashsame section
Sort an array
Sort scalar array values.
OpenIn sheetbashsame section
Sort array of objects by field
Order objects by a chosen property.
OpenIn sheetbashsame section