这种从可读流(例如请求)读取数据的方式有什么优势:
request.on('readable', function(){
var chunk = null;
while (null !== (chunk = request.read())) {
response.write(chunk);
};
});
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vs这种没有while循环的方式?因为'可读'只会继续射击为什么要打扰while循环?
request.on('readable', function(){
var chunk = request.read();
if(chunk !== null){
response.write(chunk);
}
});
Run Code Online (Sandbox Code Playgroud) 使用Android 5.0的Galaxy Note4的用户昨天我的应用程序崩溃了.这是堆栈跟踪.
我的应用程序主要只是一个网站的webview包装器.有什么我可以做的来改进webview或使其更有效地防止20个左右的崩溃我得到一周所有具有相同的堆栈跟踪?
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'samsung/trlteuc/trlteatt:5.0.1/LRX22C/N910AUCU2COC6:user/release-keys'
Revision: '12'
ABI: 'arm'
pid: 421, tid: 421, name: ****.app >>> org.***********.app <<<
signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
Abort message: '[FATAL:jni_android.cc(249)] Check failed: false. Please include Java exception stack in crash report
'
r0 00000000 r1 000001a5 r2 00000006 r3 00000000
r4 b6fd3114 r5 00000006 r6 0000000b r7 0000010c
r8 b6fb2e04 r9 be972e14 …Run Code Online (Sandbox Code Playgroud) 我想创建一个可在我的子域中共享的cookie.我想使用这里显示的setCookie方法方法:https://www.playframework.com/documentation/1.4.x/api/play/mvc/Http.Response.html#setCookie-java.lang.String-java. lang.String-
如果我执行以下操作,它会创建一个cookie,但域名为"xxxx.mydomain.com"...所以完整域名:
response.setCookie("loggedIn", "true");
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如果我执行以下操作,cookie将永远不会显示在我的浏览器中.我究竟做错了什么?
response.setCookie("webLoggedIn", "true", ".mydomain.com", "/", 3600, false);
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当我尝试更改设置application.defaultCookieDomain似乎打破了我的cookie,但我认为它是因为我正在测试不同于生产域的域,这也是我设置的默认值.
在我的iPad上使用iOS Facebook Messenger应用程序,我正在构建一个机器人,它将向用户发送媒体播放器链接.
用户点击链接后,它会在Facebook Messenger App内打开内联链接(至少这是iPad的行为).在媒体播放结束时,我想自动关闭内联浏览器窗口并将用户返回到当前对话.
当我尝试这样做window.close()并没有关闭在iPad Facebook Messenger中打开的内联浏览器窗口时.有没有其他方法可以关闭Facebook浏览器窗口?
我一直在阅读本教程:http://tylermcginnis.com/reactjs-tutorial-a-comprehensive-guide-to-building-apps-with-react/,并在使用JVM渲染React时遇到问题犀牛.
我的App.js文件如下.它在客户端上运行时可以正常工作.使用Nashorn/JVM时出现错误:
var App = React.createClass({
getInitialState: function(){
return {
name: 'Tyler McGinnis',
friends: ['Jake Lingwall', 'Murphy Randall', 'Merrick Christensen'],
}
},
addFriend: function(friend){
this.setState({
friends: this.state.friends.concat([friend])
});
},
render: function(){
return (
<div>
<h3> Name: {this.state.name} </h3>
<AddFriend addNew={this.addFriend} />
<ShowList names={this.state.friends} />
</div>
)
}
});
var AddFriend = React.createClass({
getInitialState: function(){
return {
newFriend: ''
}
},
updateNewFriend: function(e){
this.setState({
newFriend: e.target.value
});
},
handleAddNew: function(){
this.props.addNew(this.state.newFriend);
this.setState({
newFriend: ''
});
},
render: …Run Code Online (Sandbox Code Playgroud) 我收到以下错误:
/Users/.../express/server/bundle.js:296
License: https://www.firebase.com/terms/terms-of-service.html */(function(){var h,n=this;function p(a){return void 0!==a;}function aa(){}function ba(a){a.wb=function(){return a.wf?a.wf:a.wf=new a();};}function ca(a){var b=typeof a==="undefined"?"undefined":_typeof(a);if("object"==b){if(a){if(a instanceof Array)return "array";if(a instanceof Object)return b;var c=Object.prototype.toString.call(a);if("[object Window]"==c)return "object";if("[object Array]"==c||"number"==typeof a.length&&"undefined"!=typeof a.splice&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("splice"))return "array";if("[object Function]"==c||"undefined"!=typeof a.call&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("call"))return "function";}else return "null";}else if("function"==b&&"undefined"==typeof a.call)return "object";return b;}function da(a){return "array"==ca(a);}function ea(a){var b=ca(a);r
TypeError: Cannot read property 'navigator' of undefined
at /Users/.../server/bundle.js:296:4904
at Object.<anonymous> (/Users/.../server/bundle.js:296:143270)
at __webpack_require__ (/Users/.../server/bundle.js:20:30)
at Object._typeof (/Users/.../server/bundle.js:239:18)
at __webpack_require__ (/Users/.../server/bundle.js:20:30)
at Object.i (/Users/.../server/bundle.js:52:14)
at __webpack_require__ (/Users/.../server/bundle.js:20:30)
at /Users/.../server/bundle.js:40:18
at Object.<anonymous> (/Users/.../server/bundle.js:43:10)
at Module._compile (module.js:435:26)
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这是我的webpack配置: …
我在页面上删除的"Likes"插件显示了直接点击按钮的次数,以及页面URL已被共享或Like已被评论的次数.
当我使用Graph API检查我的对象时,它只显示直接"赞"点击的数量.这是一个示例对象:
{
"id": "17678692xxxxxxx",
"name": "The Dali Lama Returns",
"picture": "http://profile.ak.fbcdn.net/hprofile-ak-snc4/161984_176786925772923_6855xxxxxxx.jpg",
"link": "http://mysite.com/8/the-dali-lama-returns",
"likes": 1,
"app_id": 478xxxxxxx,
"category": "Unknown",
"is_published": true,
"description": "The Dali Lama will speak, and we will listen.",
"about": "The Dali Lama will speak, and we will listen.",
"can_post": true
}
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这意味着在某人点击我的喜欢按钮并写了类似的评论后,该按钮将显示计数"2",但我的对象将只显示一个计数.
有没有办法获得按钮在我的页面上显示的完整"赞"计数?
facebook facebook-like facebook-graph-api facebook-social-plugins
没有任何迹象表明视频附件在通过Facebook Messenger发送时需要的大小和格式,至少在这里的文档中是这样的:https://developers.facebook.com/docs/messenger-platform/send- api-reference/video-attachment.
尺寸有限制吗?它需要什么格式?
如何设置数据库规则以便浏览器可以收听?
var connectedRef = db.ref('.info/connected');
connectedRef.on('value', function(snap) {...});
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目前尚不清楚我能够听到什么级别.info/connected.
这是我当前的数据库规则:
{
"rules": {
"service": {
"$service": {
"bot": {
"$bot_id": {
"notification": {
"$user_id": {
".write": "auth != null"
}
},
"player": {
".write": "auth != null",
".read": "auth != null"
}
}
}
}
}
}
}
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