The answer
Call the result() method: calc(5).add(3).result() returns 8. The result method returns the accumulated value and terminates the chain.
sum(1)(2)(3) with Add and Subtract Operations
How do you get the result from the extended sum?
More FAQs in sum(1)(2)(3) with Add and Subtract Operations
Return an object with methods: function calc(a) { return { add: b => calc(a + b), subtract: b => calc(a - b), result: () => a }; }. Each method returns a new calc with the updated value. result() returns the final value.
The chain pattern (also called fluent interface or method chaining). Each method returns a new object with the updated value, allowing methods to be chained: calc(5).add(3).subtract(2).result(). Similar to jQuery and lodash.
Yes. calc(10).add(5).subtract(3).multiply(2).result() returns 24. Each method returns a new calc with the updated value, so you can chain any combination of operations.
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