Files
rspade_system/node_modules/collect.js/docs/api/countBy.md
root f6fac6c4bc Fix bin/publish: copy docs.dist from project root
Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-21 02:08:33 +00:00

760 B
Executable File

countBy()

The countBy method counts the occurences of values in the collection. By default, the method counts the occurrences of every element:

const collection = collect([1, 2, 2, 2, 3]);

const counted = collection.countBy();

counted.all();

// {
//   1: 1,
//   2: 3,
//   3: 1,
// }

However, you pass a callback to the countBy method to count all items by a custom value:

const collection = collect([
  'mohamed.salah@gmail.com',
  'darwin.nunez@yahoo.com',
  'roberto.firmino@gmail.com',
]);

const counted = collection.countBy(email => email.split('@')[1]);

counted.all();

// {
//   'gmail.com': 2,
//   'yahoo.com': 1,
// }

View source on GitHub