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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...
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
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I think you are looking for this:
require(ggplot2)
df <- data.frame(x=seq(1, 1e9, length.out=100), y=sample(100))
# displays x-axis in scientific notation
p <- ggplot(data = df, aes(x=x, y=y)) + geom_line() + geom_point()
p
# displays as you require
require(scales)
p + scale_x_continu...
Installing Latest version of git in ubuntu
My Current git version 1.7.9.5...
5 Answers
5
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Showing a Spring transaction in log
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in your log4j.properties (for alternative loggers, or log4j's xml format, check the docs)
Depending on your transaction manager, you can set the logging level of the spring framework so that it gives you more info about transactions. For example, in case of using JpaTransactionManager, ...
OSGi: What are the differences between Apache Felix and Apache Karaf?
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The 'lightweight OSGi container' label is contrasting Karaf with more feature rich OSGi containers, not with Felix.
To quote Guillaume Nodet (Karaf's author) from here:
Felix is just the OSGi core runtime. Karaf provides a "distribution" based on Felix by adding other features such as...
Including another class in SCSS
I have this in my SCSS file:
5 Answers
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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.
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Select objects based on value of variable in object using jq
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Adapted from this post on Processing JSON with jq, you can use the select(bool) like this:
$ jq '.[] | select(.location=="Stockholm")' json
{
"location": "Stockholm",
"name": "Walt"
}
{
"location": "Stockholm",
"name": "Donald"...
What is the difference between sites-enabled and sites-available directory?
...are the virtual sites that exist on your server but people can't access them because they are not enabled yet.
sites-available: this directory has configuration files for Apache2 Virtual Hosts. Virtual Hosts allow Apache2 to be configured for
multiple sites that have separate configurations.
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