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Ruby on Rails generates model field:type - what are the options for field:type?
...etime "created_at"
t.datetime "updated_at"
end
As for documentation, a starting point for rails generators is Ruby on Rails: A Guide to The Rails Command Line which points you to API Documentation for more about available field types.
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How to delete last item in list?
...stems, it corresponds to time.clock
def __enter__(self):
self.start = self.timer() # measure start time
return self
def __exit__(self, exc_type, exc_value, exc_traceback):
self.end = self.timer() # measure end time
self.elapsed_s = self.end - self.start # el...
How to add a delay for a 2 or 3 seconds [closed]
... ----- ADD A DELAY (Thread.Sleep) ------>
For other scenarios (e.g. starting operations after some time etc.) check Cody's answer.
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live output from subprocess command
...rocess "cheats"! Well, it has to do this, so it's not really cheating: it starts the subprocess with both its stdout and its stderr directed into the (single) pipe-descriptor that feeds back to its parent (Python) process. On the parent side, there's again only a single pipe-descriptor for reading...
Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...
}
Exit from root:
# exit
Now restart docker:
$ sudo service docker restart
VERIFICATION:
Now check that adding the /etc/docker/daemon.json file allows you to resolve 'google.com' into an IP address:
$ docker run --rm busybox nslookup google.com
Server...
Safe integer parsing in Ruby
...ant to watch for strings that are valid non-decimal numbers, such as those starting with 0x for hex and 0b for binary, and potentially more tricky numbers starting with zero that will be parsed as octal.
Ruby 1.9.2 added optional second argument for radix so above issue can be avoided:
Integer('23...
Why can't I define a default constructor for a struct in .NET?
...ue-type semantics, while class provides reference-type semantics. When you start thinking about the implications of this change, other changes start to make more sense as well, including the constructor behavior you describe.
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Failed to allocate memory: 8
... the solution : need to specify AVD resolution forcefully : 800 x 1280. It starts my AVD as what I required
– Nirav Shah
Sep 28 '12 at 9:14
4
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What's the difference between tilde(~) and caret(^) in package.json?
...t right-most level: 0.2 means 0.2 <= v < 1. Differs from ~ because:
Starting omitted level version is always 0
You can set starting major version without specifying sublevels.
All (hopefully) possibilities
Set starting major-level and allow updates upward
* or "(empty string) any versio...
Getting a timestamp for today at midnight?
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I actually need to get start of today and midnight of today. How can I find start of today I mean for 00:00:00
– Happy Coder
Nov 22 '13 at 9:23
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