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Aligning a float:left div to center?

I want to have a group of images display horizontally across the page. Each image has a few link below it so I need to put a container around each image/link-group. ...
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Escaping a forward slash in a regular expression

My question is a simple one, and it is about regular expression escaping. Do you have to escape a forward slash / in a regular expression? And how would you go about doing it? ...
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Python, Matplotlib, subplot: How to set the axis range?

How can I set the y axis range of the second subplot to e.g. [0,1000] ? The FFT plot of my data (a column in a text file) results in a (inf.?) spike so that the actual data is not visible. ...
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Sending websocket ping/pong frame from browser

I keep reading about ping/pong messages in websockets to keep the connection alive, but I'm not sure what they are. Is it a distinct frame type? (I don't see any methods on a javascript WebSocket object in chrome related to ping-pong). Or is it just a design pattern (e.g. I literally send "ping" o...
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c# open file with default application and parameters

The most easy way to open a file with the default application is: 5 Answers 5 ...
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Force R to stop plotting abbreviated axis labels - e.g. 1e+00 in ggplot2

...long the x axis once plotted? Ideally, I want to force R to display the actual values which in this case would be 1,10 . 7...
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What is the difference between a route and resource in New Router API?

I am trying to understand the difference between a Route and a Resource . The way I understand Resource helps to set sub paths of a Route object to another Route Object. But its unclear when i think of default name mapping happening for paths as well. ...
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OSGi: What are the differences between Apache Felix and Apache Karaf?

Apache Karaf is a sub project of Apache Felix . It is defined as "a lightweight OSGi container". 3 Answers ...
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Including another class in SCSS

... Looks like @mixin and @include are not needed for a simple case like this. One can just do: .myclass { font-weight: bold; font-size: 90px; } .myotherclass { @extend .myclass; color: #000000; } ...
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PHP - Merging two arrays into one array (also Remove Duplicates)

Hi I'm Trying to merge two arrays and also want to remove duplicate values from final Array. 5 Answers ...