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How do I manage MongoDB connections in a Node.js web application?
...de-mongodb-native says:
You open do MongoClient.connect once when your app boots up and reuse
the db object. It's not a singleton connection pool each .connect
creates a new connection pool.
So, to answer your question directly, reuse the db object that results from MongoClient.connect(). ...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
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PowerShell: Setting an environment variable for a single command only
... to my PowerShell profile.
function cmd_special()
{
$orig_master = $env:app_master
$env:app_master = 'http://host.example.com'
mycmd $args
$env:app_master = $orig_master
}
So mycmd is some executable that operates differently depending on the value of the environment variable app_master. ...
Xcode 4 hangs at “Attaching to (app name)”
I just upgraded to Xcode 4 and for some reason my app won't run in the simulator or iOS device. It was working perfectly in Xcode 3, but all of a sudden now when I press run the program stops at "Attaching to...". There doesn't seem to be any other info to help with this problem either.
...
Differences between socket.io and websockets
...t attaches ID's to clients on server side, and more. So it is not just a wrapper, it is full-featured library. In fact it hasn't been supported well in recent years, so I would recommend to use SockJS which is way better and more maintained alternative to Socket.IO.
– moka
...
How to remove an iOS app from the App Store
I want to remove my app, which is currently marked "Ready for sale", from the App Store. I could not find any documentation on this, and there is no "Remove from Sale" option in the "Manage Your Apps" section of iTunes Connect. Can anyone guide me on how I can remove my app from the App Store?
...
How to send an email with Gmail as provider using Python?
... August 2014 this now raises smtplib.SMTPAuthenticationError: (534, '5.7.9 Application-specific password required.
– anon58192932
Aug 27 '14 at 18:06
7
...
Best way to add page specific JavaScript in a Rails 3 app?
...vascript in a content_for :head block and then yield to that block in your application layout. For example
If it's pretty short then:
<% content_for :head do %>
<script type="text/javascript">
$(function() {
$('user_rating_positve').click(function() {
$('some_div')....
Android: Share plain text using intent (to all messaging apps)
... the content is text, obviously.*/
intent.setType("text/plain");
/*Applying information Subject and Body.*/
intent.putExtra(android.content.Intent.EXTRA_SUBJECT, getString(R.string.share_subject));
intent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
/*Fire!*/
start...
【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
在行空板《家庭安全相册》项目中，第四部分是手机APP监护人部分。这部分需要完成手机获取家庭成员传送回来的位置后，计算是否在安全的电子围栏范围内。因为电子围栏是相对复杂的部分，因此独立一章详细说明。
App In...