finish by 小覃

Observable.js

@@ -11,12 +11,15 @@ class ObserverList {
   }
   add(observer) {
     // todo add observer to list
+    this.observerList.push(observer)
   }
   remove(observer) {
     // todo remove observer from list
+    this.observerList = this.observerList.filter(item => item !== observer)
   }
   count() {
     // return observer list size
+    return this.observerList.length
   }
 }
 
@@ -26,12 +29,17 @@ class Subject {
   }
   addObserver(observer) {
     // todo add observer
+    this.observers.add(observer)
   }
   removeObserver(observer) {
     // todo remove observer
+    this.observers.remove(observer)
   }
   notify(...args) {
     // todo notify
+    this.observers.observerList.map(ob => {
+      ob.update.call(ob, ...args)
+    })
   }
 }
 

PubSub.js

@@ -13,14 +13,30 @@ module.exports = class PubSub {
 
   subscribe(type, fn) {
     // todo subscribe
+    if (!this.subscribers[type]) {
+      this.subscribers[type] = []
+    }
+    this.subscribers[type].push(fn)
+    return 
   }
 
   unsubscribe(type, fn) {
     // todo unsubscribe
+    if (this.subscribers[type]) {
+      this.subscribers[type] = this.subscribers[type].filter(func => {
+        return func !== fn
+      })
+    }
+    return 
   }
 
   publish(type, ...args) {
     // todo publish
+    if (!this.subscribers[type]) {
+      return
+    }
+    this.subscribers[type].map(func => func.call(this,...args))
+    return
   }
 
 }

yarn.lock

@@ -0,0 +1,134 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+balanced-match@^1.0.0:
+  version "1.0.0"
+  resolved "http://registry.npm.taobao.org/balanced-match/download/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
+
+brace-expansion@^1.1.7:
+  version "1.1.11"
+  resolved "http://registry.npm.taobao.org/brace-expansion/download/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
+  dependencies:
+    balanced-match "^1.0.0"
+    concat-map "0.0.1"
+
+browser-stdout@1.3.1:
+  version "1.3.1"
+  resolved "http://registry.npm.taobao.org/browser-stdout/download/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"
+
+commander@2.15.1:
+  version "2.15.1"
+  resolved "http://registry.npm.taobao.org/commander/download/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
+
+concat-map@0.0.1:
+  version "0.0.1"
+  resolved "http://registry.npm.taobao.org/concat-map/download/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
+
+debug@3.1.0:
+  version "3.1.0"
+  resolved "http://registry.npm.taobao.org/debug/download/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  dependencies:
+    ms "2.0.0"
+
+diff@3.5.0:
+  version "3.5.0"
+  resolved "http://registry.npm.taobao.org/diff/download/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
+
+escape-string-regexp@1.0.5:
+  version "1.0.5"
+  resolved "http://registry.npm.taobao.org/escape-string-regexp/download/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
+
+fs.realpath@^1.0.0:
+  version "1.0.0"
+  resolved "http://registry.npm.taobao.org/fs.realpath/download/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
+
+glob@7.1.2:
+  version "7.1.2"
+  resolved "http://registry.npm.taobao.org/glob/download/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+growl@1.10.5:
+  version "1.10.5"
+  resolved "http://registry.npm.taobao.org/growl/download/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
+
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "http://registry.npm.taobao.org/has-flag/download/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+
+he@1.1.1:
+  version "1.1.1"
+  resolved "http://registry.npm.taobao.org/he/download/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
+
+inflight@^1.0.4:
+  version "1.0.6"
+  resolved "http://registry.npm.taobao.org/inflight/download/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
+  dependencies:
+    once "^1.3.0"
+    wrappy "1"
+
+inherits@2:
+  version "2.0.3"
+  resolved "http://registry.npm.taobao.org/inherits/download/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+
+minimatch@3.0.4, minimatch@^3.0.4:
+  version "3.0.4"
+  resolved "http://registry.npm.taobao.org/minimatch/download/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
+  dependencies:
+    brace-expansion "^1.1.7"
+
+minimist@0.0.8:
+  version "0.0.8"
+  resolved "http://registry.npm.taobao.org/minimist/download/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+
+mkdirp@0.5.1:
+  version "0.5.1"
+  resolved "http://registry.npm.taobao.org/mkdirp/download/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  dependencies:
+    minimist "0.0.8"
+
+mocha@^5.0.0:
+  version "5.2.0"
+  resolved "http://registry.npm.taobao.org/mocha/download/mocha-5.2.0.tgz#6d8ae508f59167f940f2b5b3c4a612ae50c90ae6"
+  dependencies:
+    browser-stdout "1.3.1"
+    commander "2.15.1"
+    debug "3.1.0"
+    diff "3.5.0"
+    escape-string-regexp "1.0.5"
+    glob "7.1.2"
+    growl "1.10.5"
+    he "1.1.1"
+    minimatch "3.0.4"
+    mkdirp "0.5.1"
+    supports-color "5.4.0"
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "http://registry.npm.taobao.org/ms/download/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+
+once@^1.3.0:
+  version "1.4.0"
+  resolved "http://registry.npm.taobao.org/once/download/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  dependencies:
+    wrappy "1"
+
+path-is-absolute@^1.0.0:
+  version "1.0.1"
+  resolved "http://registry.npm.taobao.org/path-is-absolute/download/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
+
+supports-color@5.4.0:
+  version "5.4.0"
+  resolved "http://registry.npm.taobao.org/supports-color/download/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
+  dependencies:
+    has-flag "^3.0.0"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "http://registry.npm.taobao.org/wrappy/download/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"