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How to check the version before installing a package using apt-get?
...ow the version details.
It also shows which version is currently installed and which versions are available to install.
For example, apt-cache policy hylafax+
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How to schedule a function to run every hour on Flask?
I have a Flask web hosting with no access to cron command.
8 Answers
8
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Converting Go struct to JSON
...rmines the behavior". The visibility metadata needs to be stored somewhere and needs syntax to express it. Eventually it was determined that co opting the capitalization of the first char works best with fewest trade-offs. Before the Go1 release other schemes were tried and rejected.
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JOIN two SELECT statement results
... a database of tasks where each record is a separate task, with deadlines (and a PALT , which is just an INT of days from start to deadline. Age is also an INT number of days.)
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Node.js check if file exists
...h.existsSync('foo.txt')) {
// do something
}
For Node.js v0.12.x and higher
Both path.exists and fs.exists have been deprecated
*Edit:
Changed: else if(err.code == 'ENOENT')
to: else if(err.code === 'ENOENT')
Linter complains about the double equals not being the triple equals.
Usin...
Random String Generator Returning Same String [duplicate]
I've developed a random string generator but it's not behaving quite as I'm hoping. My goal is to be able to run this twice and generate two distinct four character random strings. However, it just generates one four character random string twice.
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Preferred Java way to ping an HTTP URL for availability
...ve to somehow close the connection?
No, you don't explicitly need. It's handled and pooled under the hoods.
I suppose this is a GET request. Is there a way to send HEAD instead?
You can cast the obtained URLConnection to HttpURLConnection and then use setRequestMethod() to set the request ...
Tick symbol in HTML/XHTML
We need to display a tick symbol (✓ or ✔) within an internal web app and would ideally like to avoid using an image.
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How to run a single RSpec test?
...RSpec.configure do |config|
config.filter_run_when_matching :focus
end
And then add a focus tag to the it, context or describe to run only that block:
it 'runs a test', :focus do
...test code
end
RSpec documentation:
https://www.rubydoc.info/github/rspec/rspec-core/RSpec/Core/Configuration...
Open link in new tab or window [duplicate]
...
You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag.
For example:
<a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a>
Adding rel="noopener noreferrer" is not mandatory, but it's ...