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Heroku + node.js error (Web process failed to bind to $PORT within 60 seconds of launch)
...ort to a fixed number. Heroku adds the port to the env, so you can pull it from there. Switch your listen to this:
.listen(process.env.PORT || 5000)
That way it'll still listen to port 5000 when you test locally, but it will also work on Heroku.
You can check out the Heroku docs on Node.js here....
How to convert SecureString to System.String?
...e length stored in the BSTR will be a copy of the length already available from SecureString.Length.
– Ben Voigt
Nov 8 '19 at 15:27
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In Jinja2, how do you test if a variable is undefined?
Converting from Django, I'm used to doing something like this:
6 Answers
6
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What is the difference between bottom-up and top-down?
...pically, you would perform a recursive call (or some iterative equivalent) from the root, and either hope you will get close to the optimal evaluation order, or obtain a proof that you will help you arrive at the optimal evaluation order. You would ensure that the recursive call never recomputes a s...
Fragment or Support Fragment?
I am developing an app that supports Android >= 4.0. It uses fragments from the android.app package. As I am facing problems with the older fragment implementation in 4.0, like this one , that are already fixed in the support library, I am considering switching back to the fragment implementation...
Manually raising (throwing) an exception in Python
...ns, which preserve tracebacks:
raise RuntimeError('specific message') from error
Be aware:
this does allow changing the error type raised, and
this is not compatible with Python 2.
Deprecated Methods:
These can easily hide and even get into production code. You want to raise an exception...
What does “not run” mean in R help pages?
...on an R help page the phrase "not run" appears in comments. Check out this from the help page for "with()":
5 Answers
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How can I tell Rails to use RSpec instead of test-unit when creating a new Rails app?
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Can you edit the code from g.test_framework = :rspec to g.test_framework :rspec
– Deepak Lamichhane
Jul 2 '13 at 10:23
8
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What is time_t ultimately a typedef to?
...brary defined for storing
system time values. Such values are
returned from the standard time()
library function. This type is a
typedef defined in the standard
header. ISO C defines
time_t as an arithmetic type, but does
not specify any particular type,
range, resolution, or encodi...
CSS: Setting width/height as Percentage minus pixels
...ht also cause some troubles, as absolutely positioned elements are removed from the normal flow, see stackoverflow.com/a/12821537/4173303.
– Christophe Weis
Apr 16 '15 at 12:29
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