REPL tab complete for Arrays

lib/repl.js

@@ -580,7 +580,20 @@ REPLServer.prototype.complete = function(line, callback) {
           // if (e) console.log(e);
 
           if (obj != null) {
-            if (util.isObject(obj) || util.isFunction(obj)) {
+            if (util.isArray(obj)) {
+              // Array elements will contain many integer values
+              // if we return them in memberGroups they will appear
+              // as obj.0 obj.100 etc. which is not valid syntax.
+              // Additionally for large arrays this can make for a
+              // very cluttered list.  So I filter them out.
+              memberGroups
+                .push(Object
+                      .getOwnPropertyNames(obj)
+                      .filter(function(element) {
+                        // parseInt('0', 10) == 0
+                        return element == 0 ? false : !parseInt(element, 10);
+                  }));
+            } else if (util.isObject(obj) || util.isFunction(obj)) {
               memberGroups.push(Object.getOwnPropertyNames(obj));
             }
             // works for non-objects

test/simple/test-repl-tab-complete-array-remove-integer-elements.js

@@ -0,0 +1,107 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+var util = require('util');
+
+var repl = require('repl');
+
+// A stream to push an array into a REPL
+function ArrayStream() {
+  this.run = function(data) {
+    var self = this;
+    data.forEach(function(line) {
+      self.emit('data', line + '\n');
+    });
+  }
+}
+util.inherits(ArrayStream, require('stream').Stream);
+ArrayStream.prototype.readable = true;
+ArrayStream.prototype.writable = true;
+ArrayStream.prototype.resume = function() {};
+ArrayStream.prototype.write = function() {};
+
+var array_elements = [
+  [ 'asdf.__defineGetter__', 'asdf.__defineSetter__',
+    'asdf.__lookupGetter__', 'asdf.__lookupSetter__',
+    'asdf.__proto__', 'asdf.constructor',
+    'asdf.hasOwnProperty', 'asdf.isPrototypeOf',
+    'asdf.propertyIsEnumerable',
+    'asdf.toLocaleString', 'asdf.toString',
+    'asdf.valueOf', '', 'asdf.concat', 'asdf.constructor',
+    'asdf.every', 'asdf.filter',
+    'asdf.forEach', 'asdf.indexOf',
+    'asdf.join', 'asdf.lastIndexOf',
+    'asdf.length', 'asdf.map',
+    'asdf.pop', 'asdf.push', 'asdf.reduce',
+    'asdf.reduceRight', 'asdf.reverse', 'asdf.shift',
+    'asdf.slice', 'asdf.some', 'asdf.sort', 'asdf.splice',
+    'asdf.toLocaleString', 'asdf.toString', 'asdf.unshift',
+    '', 'asdf.length' ],
+  'asdf.' ];
+
+var object_elements = [
+  [ 'asdf.__defineGetter__', 'asdf.__defineSetter__',
+    'asdf.__lookupGetter__', 'asdf.__lookupSetter__',
+    'asdf.__proto__', 'asdf.constructor',
+    'asdf.hasOwnProperty', 'asdf.isPrototypeOf',
+    'asdf.propertyIsEnumerable',
+    'asdf.toLocaleString', 'asdf.toString',
+    'asdf.valueOf', '', 'asdf.1'],
+  'asdf.' ];
+
+var putIn = new ArrayStream();
+var testMe = repl.start('', putIn);
+
+// Tab Complete will not return integer indexes
+putIn.run(['.clear']);
+putIn.run([
+  'asdf = [\'one\', 2, 3]',
+]);
+testMe.complete('asdf.', function(error, data) {
+    assert.deepEqual(data, array_elements);
+});
+
+// Tab Complete will return additional non-integer indexes
+putIn.run(['.clear']);
+putIn.run([
+  'asdf = [\'one\', 2, 3]',
+  'asdf.qwer = 1'
+]);
+
+var array_with_extra = array_elements;
+array_with_extra[0].push('qwer');
+
+testMe.complete('asdf.', function(error, data) {
+  assert.deepEqual(data, array_with_extra);
+});
+
+// Tab Complete will return integer indexes on an object
+putIn.run(['.clear']);
+putIn.run([
+  'asdf = {}',
+  'asdf[1] = 1'
+]);
+testMe.complete('asdf.', function(error, data) {
+  assert.deepEqual(data, object_elements);
+});
+