Create 2043-simple-bank-system.js

Author: everthis

2043-simple-bank-system.js

@@ -0,0 +1,56 @@
+/**
+ * @param {number[]} balance
+ */
+const Bank = function(balance) {
+  this.n = balance.length
+  balance.unshift(0)
+  this.b = balance
+  
+};
+
+/** 
+ * @param {number} account1 
+ * @param {number} account2 
+ * @param {number} money
+ * @return {boolean}
+ */
+Bank.prototype.transfer = function(account1, account2, money) {
+  let res = true
+  if(account1 > this.n || account1 < 1) return false
+  if(account2 > this.n || account2 < 1) return false
+  if(this.b[account1]< money) return false
+  this.b[account1] -= money
+  this.b[account2] += money
+  return true
+};
+
+/** 
+ * @param {number} account 
+ * @param {number} money
+ * @return {boolean}
+ */
+Bank.prototype.deposit = function(account, money) {
+  if(account > this.n || account < 1) return false
+  this.b[account] += money
+  return true
+};
+
+/** 
+ * @param {number} account 
+ * @param {number} money
+ * @return {boolean}
+ */
+Bank.prototype.withdraw = function(account, money) {
+  if(account > this.n || account < 1) return false
+  if(this.b[account] < money) return false
+  this.b[account] -= money
+  return true
+};
+
+/** 
+ * Your Bank object will be instantiated and called as such:
+ * var obj = new Bank(balance)
+ * var param_1 = obj.transfer(account1,account2,money)
+ * var param_2 = obj.deposit(account,money)
+ * var param_3 = obj.withdraw(account,money)
+ */