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 ...

is a senior correspondent and author of Notepad, who has been covering all things Microsoft, PC, and tech for over 20 years. Microsoft Excel used to only allow two types of data: text and numbers.

One of the most convenient ways to manipulate information in scripts is to store it in an array. Arrays facilitate looping through lists of related values, keeping track of an ever changing number of ...