Data manipulation

Data Manipulation

Cases:

• [How to add own keys for grouped output?](How to add own keys for grouped output)
• [How to create a cleaned up contact object of an array of contact data?](How to create a cleaned up contact object of an array of contact data)
• [How to joins and aggregates in Javascript arrays?](How to joins and aggregates in Javascript arrays)
• [How to group and count?](How to group and count)
• [How to Group By and Sum?](How to Group By and Sum)
• [How to group and sort a JS array?](How to group and sort a JS array)
• [How to SUM and GROUP BY of JSON data?](How to SUM and GROUP BY of JSON data)
• [How to unique by multiple properties?](How to unique by multiple properties)