spreadsheet, which need a two-dimensional array • Examples: Find the average rating by the reviewer in row 2 What is the length of the array?
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JavaScript arrays ? “dynamic” entities that can change size after they are created 2 Every array in JavaScript knows its own length,
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We describe a two dimensional array by the number of rows and the number of columns The example above is a 3 by 3 array REMEMBER in Javascript arrays are
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You can save data to a cell, or retrieve data from the cell, using the row number (or index) in the table In JavaScript, arrays are all single-dimensional,
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