I found using .filter() .map() and .reduce() Array methods could help to reduce code complexity and simplify many typical array data processing tasks. Looking at http://kangax.github.io/compat-table/es5/#test-Array_methods, you can confirm these methods are compatible with almost any modern desktop/mobile browser.
A good approach to understand how to use .filter() .map() and .reduce() is to compare each one to SQL data operations in SELECT statements.
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