verify operator

DaleSeo · DaleSeo · commit d8beb684c608 · 2017-02-10T19:16:05.000+09:00
diff --git a/lesson2/solutions/calculator.js b/lesson2/solutions/calculator.js
@@ -11,6 +11,10 @@ var left = Number(process.argv[2]);
 var operator = process.argv[3];
 var right = Number(process.argv[4]);
 
+if (operators.indexOf(operator) == -1) {
+	throw new Error('Invalid operator!');
+}
+
 if (isNaN(left) || isNaN(right)) {
 	throw new Error('Invalid operands!');
 }
@@ -33,4 +37,4 @@ switch (operator) {
 		throw new Error('Invalid operator!');
 }
 
-console.log(answer);
+console.log(answer);

Original file line number	Diff line number	Diff line change
`@@ -11,6 +11,10 @@ var left = Number(process.argv[2]);`
`11`	`11`	`var operator = process.argv[3];`
`12`	`12`	`var right = Number(process.argv[4]);`
`13`	`13`
	`14`	`+if (operators.indexOf(operator) == -1) {`
	`15`	`+ throw new Error('Invalid operator!');`
	`16`	`+}`
	`17`	`+`
`14`	`18`	`if (isNaN(left) \|\| isNaN(right)) {`
`15`	`19`	`throw new Error('Invalid operands!');`
`16`	`20`	`}`
`@@ -33,4 +37,4 @@ switch (operator) {`
`33`	`37`	`throw new Error('Invalid operator!');`
`34`	`38`	`}`
`35`	`39`
`36`		`-console.log(answer);`
	`40`	`+console.log(answer);`