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May 6, 2019 11:55
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User Constructor Code...this is for my article on object oriented programming
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| /* a userArray to serve as database for storing Users */ | |
| let userArray = []; | |
| /* create an Id variable set it to zero and auto increment it each time the user constructor is called */ | |
| let id = 0; | |
| /* A User constructor to create users */ | |
| function User(name) { | |
| this.name = name; | |
| accountBalance = this.accountBalance = 0; | |
| userId = this.id = id++; | |
| /* for Everytime the user constructor is called. We push in the created object into UserArray */ | |
| userArray.push(this); | |
| } | |
| /* add the makeDeposit method to the prototype */ | |
| User.prototype.makeDeposit = function(amount) { | |
| /* make sure the amount is a valid number */ | |
| if (typeof amount !== "number") return "please enter a valid number"; | |
| /* add the deposited amount to the user's accountBalance */ | |
| this.accountBalance += amount; | |
| return this; | |
| }; | |
| /* add the withdrawal method to the prototype */ | |
| User.prototype.withdrawal = function(amount) { | |
| /* make sure the amount is a valid number */ | |
| if (typeof amount !== "number") return "please enter a valid number"; | |
| /* deduct the specified amount from the user's accountBalance*/ | |
| this.accountBalance -= amount; | |
| return this; | |
| }; | |
| module.exports = { | |
| User, | |
| userArray | |
| }; |
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