Calculator: repair the calculator

compnerd · compnerd · commit 9cca82dbeb88 · 2021-11-21T10:36:26.000-08:00
Update the state after mutation to ensure that subsequent mutations will
see the new state.  This allows multi-digit entries again.
diff --git a/Examples/Calculator/Calculator.swift b/Examples/Calculator/Calculator.swift
@@ -126,6 +126,7 @@ private class Calculator {
     var operand = self.state[keyPath: self.state.operand] as Decimal
     operand *= 10
     operand += Decimal(input)
+    self.state[keyPath: self.state.operand] = operand as NSDecimalNumber
 
     self.txtResult.text = operand.description
   }

Original file line number	Diff line number	Diff line change
`@@ -126,6 +126,7 @@ private class Calculator {`
`126`	`126`	`var operand = self.state[keyPath: self.state.operand] as Decimal`
`127`	`127`	`operand *= 10`
`128`	`128`	`operand += Decimal(input)`
	`129`	`+ self.state[keyPath: self.state.operand] = operand as NSDecimalNumber`
`129`	`130`
`130`	`131`	`self.txtResult.text = operand.description`
`131`	`132`	`}`