The morning when a single cell became a 'two-dimensional array' in the GAS Castle in the Sky

I left the DOM castle town of JavaScript and entered the GAS Castle in the Sky.What I did this time was read values from a ...
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Functional programming with JavaScript arrays

JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the array ...