Add number support for choices prompt (#796)

* Add number support for choice prompt

* Update readme

README.md

@@ -119,7 +119,7 @@ A question object is a `hash` containing question related values:
 - **message**: (String|Function) The question to print. If defined as a function, the first parameter will be the current inquirer session answers. Defaults to the value of `name` (followed by a colon).
 - **default**: (String|Number|Boolean|Array|Function) Default value(s) to use if nothing is entered, or a function that returns the default value(s). If defined as a function, the first parameter will be the current inquirer session answers.
 - **choices**: (Array|Function) Choices array or a function returning a choices array. If defined as a function, the first parameter will be the current inquirer session answers.
-  Array values can be simple `strings`, or `objects` containing a `name` (to display in list), a `value` (to save in the answers hash) and a `short` (to display after selection) properties. The choices array can also contain [a `Separator`](#separator).
+  Array values can be simple `numbers`, `strings`, or `objects` containing a `name` (to display in list), a `value` (to save in the answers hash) and a `short` (to display after selection) properties. The choices array can also contain [a `Separator`](#separator).
 - **validate**: (Function) Receive the user input and answers hash. Should return `true` if the value is valid, and an error message (`String`) otherwise. If `false` is returned, a default error message is provided.
 - **filter**: (Function) Receive the user input and return the filtered value to be used inside the program. The value returned will be added to the _Answers_ hash.
 - **transformer**: (Function) Receive the user input, answers hash and option flags, and return a transformed value to display to the user. The transformation only impacts what is shown while editing. It does not modify the answers hash.

packages/inquirer/lib/objects/choice.js

@@ -5,8 +5,8 @@ var _ = require('lodash');
  * Choice object
  * Normalize input as choice object
  * @constructor
- * @param {String|Object} val  Choice value. If an object is passed, it should contains
- *                             at least one of `value` or `name` property
+ * @param {Number|String|Object} val  Choice value. If an object is passed, it should contains
+ *                                    at least one of `value` or `name` property
  */
 
 module.exports = class Choice {
@@ -16,10 +16,10 @@ module.exports = class Choice {
       return val;
     }
 
-    if (_.isString(val)) {
-      this.name = val;
+    if (_.isString(val) || _.isNumber(val)) {
+      this.name = String(val);
       this.value = val;
-      this.short = val;
+      this.short = String(val);
     } else {
       _.extend(this, val, {
         name: val.name || val.value,

packages/inquirer/test/specs/objects/choices.js

@@ -11,6 +11,11 @@ describe('Choices collection', function() {
     expect(choices.getChoice(1)).to.be.instanceOf(Choice);
   });
 
+  it('should support for number', function() {
+    var choices = new Choices([1, 2, 3, 4]);
+    expect(choices.getChoice(0).value).to.equal(1);
+  });
+
   it('should not process Separator object', function() {
     var sep = new inquirer.Separator();
     var choices = new Choices(['Bar', sep]);