In general, handling array functions like we’ve seen here, using JavaScript’s built-in functions like map() and filter(), is an excellent application of the power of functional programming.

Part II: Revise your product_order.js file so that it includes a new function – login (). When the function is called, two corresponding arrays are created. The first array contains four (4) user ...

Use popular 'grammar of data' syntax to filter and subset your two-dimensional JavaScript arrays and more. Here's how to use Arquero for data wrangling in Observable JavaScript and Node.js.

Finally, you create a for () loop to cycle through the array and assign each one of them to the Image () object, thus preloading it into the cache. The onLoad () event handler ...