exercism/jq/bird-count/HINTS.md

Hints

General

1. Check what the counts were last week

• Return the second last element of the array.

2. Check how many birds visited yesterday

• As the data is an array of arrays, you'll need to index once to get the correct weekly array, then index again to get the wanted day.
• "Today" is the last element of the weekly array.

3. Calculate the total number of visiting birds

• It's possible to calculate the sum of an array using the add filter. You saw this expression in the Basics concept and the Shopping exercise.

4. Calculate the number of busy days

• You'll need to select the days with count greater then or equal to 5, then return the size of the resulting array.

5. Check if there was a day with no visiting birds

• The one-argument version of the any filter will be appropriate.