![]() If I still were in education, these examples would’ve made it into my course □Īdditionally, say you want to convert an array to an object with a certain field as its key. filter(): When you want to remove unwanted values from an array.Ĭonst above30 = euros.filter(euro => euro >= 30) reduce(): When you want a total based on values in an array.Ĭonst sum = euros.reduce((total, amount) => total + amount, 0) ![]() map(): When you want to translate values in an array into another set of values.Ĭonst euros = dollars.map(eachAmount => eachAmount *. JavaScript provides powerful array manipulation methods that greatly simplify data transformations and manipulations. In The Trouble With Loops I found these nice and simple examples covering Array#map(), Array#reduce(), and Array#filter(). ![]()
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