exercism/jq/shopping/HINTS.md

Hints

General

This exercise will get you to write jq filters for four tasks. Because a jq program is a single expression, those four filters need to be joined with commas. Use parentheses around the sub-expressions to control the order of operations.

1. Extract the shopping list name

• The file contents can be accessed with the . filter.
• An object property can be accessed with dot-notation or bracket-notation.

2. Count how many ingredients are needed

• You need to output the length of an array.

3. How much sugar?

• You need to select the ingredient named "sugar".
• You need to access one of its properties.

4. Map the ingredients which can be substituted

• You need to concatenate two arrays.
• You need to select specific elements from the resulting array.
• You need to generate a key:value object for each of these elements.
• You need to merge these objects into a single object.