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fix contract function type

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Edgar 2019-02-06 12:49:39 +04:00 committed by GitHub
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@ -346,13 +346,13 @@ A contract specifies the obligations and guarantees of the behavior from a funct
// Define our contract : int -> boolean // Define our contract : int -> boolean
const contract = (input) => { const contract = (input) => {
if (typeof input === 'number') return true if (typeof input === 'number') return true
throw new Error('Contract violated: expected int -> int') throw new Error('Contract violated: expected int -> boolean')
} }
const addOne = (num) => contract(num) && num + 1 const addOne = (num) => contract(num) && num + 1
addOne(2) // 3 addOne(2) // 3
addOne('some string') // Contract violated: expected int -> int addOne('some string') // Contract violated: expected int -> boolean
``` ```
## Category ## Category