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How do I manage MongoDB connections in a Node.js web application?
...
The primary committer to node-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 an...
Select something that has more/less than x character
...ngth(), mysql also uses Length.
Here is the Oracle documentation:
http://www.techonthenet.com/oracle/functions/length.php
And here is the mySQL Documentation of Length(string):
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_length
For PostgreSQL, you can use length(string...
How do you make a LinearLayout scrollable?
...d:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="wrap_con...
Hex representation of a color with alpha channel?
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It looks like there is no hex alpha format: http://www.w3.org/TR/css3-color/
Anyway, if you use a CSS preprocessor like SASS then you can pass an hex to rgba:
background:
rgba(#000, 0.5);
And the preprocessor just converts the hex code to rgb automatically.
...
Cannot download Docker images behind a proxy
...k to the official Docker documentation for proxy HTTP:
https://docs.docker.com/config/daemon/systemd/#httphttps-proxy
A quick outline:
First, create a systemd drop-in directory for the Docker service:
mkdir /etc/systemd/system/docker.service.d
Now create a file called /etc/systemd/system/docker...
How do you do a simple “chmod +x” from within python?
...
201
Use os.stat() to get the current permissions, use | to or the bits together, and use os.chmod()...
Why does the JVM still not support tail-call optimization?
... just link to webarchive web.archive.org/web/20120506085636/http://www.ibm.com/…
– Suvitruf - Andrei Apanasik
Jan 29 '15 at 22:30
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Open a URL in a new tab (and not a new window)
...ng an event listener to your DOM object.
<div onclick="openInNewTab('www.test.com');">Something To Click On</div>
http://www.tutsplanet.com/open-url-new-tab-using-javascript/
share
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How to use RestSharp with async/await
... var client = new RestClient();
var request = new RestRequest("http://www.google.com");
var cancellationTokenSource = new CancellationTokenSource();
var restResponse =
await client.ExecuteTaskAsync(request, cancellationTokenSource.Token);
// Will output the HTML contents ...