how can i count number of entries in a json file from bash
You can easily count the number of entries in a JSON file from Bash using jq. The exact command depends on the structure of your JSON file.
1. If your JSON file is an array of objects, e.g.:
[
{"name": "Alice"},
{"name": "Bob"},
{"name": "Charlie"}
] You can count the number of entries with:
jq length file.json or
jq '. | length' file.json 2. If your JSON file is an object with keys, e.g.:
{
"a": {"name": "Alice"},
"b": {"name": "Bob"}
} You can count the number of keys with:
jq 'keys | length' file.json 3. If you want to count all objects in a nested structure, you might use:
jq '.[]' file.json | wc -l But this works best for top-level arrays.
Summary:
- For arrays:
jq length file.json - For objects:
jq 'keys | length' file.json