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Sell me on const correctness
... be changed,
It protects you from making accidental variable assignments, and
The compiler can optimize it. For instance, you are protected from
if( x = y ) // whoops, meant if( x == y )
At the same time, the compiler can generate more efficient code because it knows exactly what the state of...
Equivalent of “throw” in R
...does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
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Git push existing repo to a new and different remote repo server?
Say I have a repository on git.fedorahosted.org and I want to clone this into my account at github to have my own playground aside from the more "official" repo on fedorahosted.
What would be the steps to initially copy that over?
Within github there is this nice "fork" button, but I can't use thi...
Why can't I overload constructors in PHP?
I have abandoned all hope of ever being able to overload my constructors in PHP, so what I'd really like to know is why .
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django template display item value or empty string
...n just code. This helps the person who asked the question to better understand your answer.
– Victor Zamanian
Apr 20 '18 at 10:01
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Is it possible to view RabbitMQ message contents directly from the command line?
Is it possible to view RabbitMQ message contents directly from the command line?
6 Answers
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How to get the instance id from within an ec2 instance?
... of a more advanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "$EC2_INSTANCE_ID" || die 'cannot obtain instance-id'
EC2_AVAIL_ZONE=...
Batch file include external file for variables
I have a batch file and I want to include external file containing some variables (say configuration variables). Is it possible?
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Finding Variable Type in JavaScript
...d]"
With that you would not have to distinguish between primitive values and objects.
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Send POST Request with Data Specified in File via Curl
I need to make a POST request via Curl from the command line. Data for this request is located in a file. I know that via PUT this could be done with the --upload-file option.
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