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is and isnt and or not in operator of operator Chained comparisons Floor division // Modulo %% Exponentiation ** Assignment operators Nullish assignment ?=
JavaScript Interop
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Patterns & Practical Code
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CoffeeScript Complete Course / Iteration

Array mapping comprehension

Learn Array mapping comprehension in CoffeeScript with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.

10 min read • Intermediate

Array mapping comprehension is an atomic CoffeeScript topic inside Iteration. The example below uses the actual construct named by the lesson rather than a generic placeholder.

Focus on what Array mapping comprehension changes: the input, binding, control path, object state, collection, runtime effect, or language contract. Then alter one value and verify that the behavior changes for a reason specific to this feature.

Topic-specific example

coffeescript-04-10-array-mapping-comprehension.coffee
coffeescript Try It Live 
prices=[10,20,30]
withTax=(p*1.18 for p in prices)
console.log withTax
Edge case / engineering note

Check the input collection shape, whether the operation mutates or returns a new value, and what happens for an empty collection.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Array mapping comprehension Mastery Check →
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