From 0880787d680dbdaab19813d96e1f4c98ad2412e8 Mon Sep 17 00:00:00 2001
From: Julien Fontanet <julien.fontanet@isonoe.net>
Date: Wed, 29 Apr 2015 14:33:37 +0200
Subject: [PATCH] new Index() now accepts a computeHash() callback-ish.

---
 packages/xo-collection/package.json      | 8 ++++----
 packages/xo-collection/src/index.js      | 7 ++++++-
 packages/xo-collection/src/index.spec.js | 3 +--
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/packages/xo-collection/package.json b/packages/xo-collection/package.json
index 943d89917..00c4e9270 100644
--- a/packages/xo-collection/package.json
+++ b/packages/xo-collection/package.json
@@ -21,10 +21,10 @@
   ],
   "dependencies": {
     "babel-runtime": "^5",
-    "lodash.bind": "^3.1.0",
-    "lodash.callback": "^3.1.1",
-    "lodash.foreach": "^3.0.2",
-    "make-error": "^1.0.0"
+    "lodash.bind": "^3",
+    "lodash.callback": "^3",
+    "lodash.foreach": "^3",
+    "make-error": "^1"
   },
   "devDependencies": {
     "babel": "^5",
diff --git a/packages/xo-collection/src/index.js b/packages/xo-collection/src/index.js
index 70ed04c9a..aac48e146 100644
--- a/packages/xo-collection/src/index.js
+++ b/packages/xo-collection/src/index.js
@@ -1,4 +1,5 @@
 import bind from 'lodash.bind'
+import callback from 'lodash.callback'
 
 import clearObject from './clear-object'
 import isEmpty from './is-empty'
@@ -7,7 +8,11 @@ import NotImplemented from './not-implemented'
 // ===================================================================
 
 export default class Index {
-  constructor () {
+  constructor (computeHash) {
+    if (computeHash) {
+      this.computeHash = callback(computeHash)
+    }
+
     this._itemsByHash = Object.create(null)
     this._keysToHash = Object.create(null)
 
diff --git a/packages/xo-collection/src/index.spec.js b/packages/xo-collection/src/index.spec.js
index 1eed303d5..2587f4a19 100644
--- a/packages/xo-collection/src/index.spec.js
+++ b/packages/xo-collection/src/index.spec.js
@@ -57,8 +57,7 @@ describe('Index', function () {
       col.add(item)
     })
 
-    byGroup = new Index()
-    byGroup.computeHash = item => item.group
+    byGroup = new Index('group')
 
     col.createIndex('byGroup', byGroup)