Comparing Arrays in JavaScript
Comparing arrays in JavaScript is trickier than it first looks. This guide covers reference equality, value comparison, and practical alternatives.
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Responsive Development, page 3 of 3
Responsive development asks one implementation to cope with changing space, capabilities, and content rather than guessing a fixed device. The articles here work through the CSS and browser behaviour behind that flexibility. Unlike adaptive development, the goal is usually to keep one codebase coherent as the conditions change.
Comparing Arrays in JavaScript. 
Appending and Prepending Items to JavaScript Arrays. Appending and Prepending Items to JavaScript Arrays
Use push() and unshift() to append or prepend JavaScript array items, with simple examples and the easily missed return value of each method.