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December 6, 2019 14:55
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| function getMoneyBack(money, callback) { | |
| money = String(money) // force the error | |
| if (typeof money !== 'number') { | |
| callback(null, new Error('money is not a number')) | |
| // callback(new Error('money is not a number')) | |
| } else { | |
| callback(money) | |
| } | |
| } | |
| getMoneyBack(1200, function(money) { | |
| console.log(money) | |
| }) |
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