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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
...ry&.name
NoMethodError: undefined method `name' for "Australia":String
from (pry):38:in `<main>'
> params.try(:country).try(:name)
nil
It is also including a similar sort of way: Array#dig and Hash#dig. So now this
city = params.fetch(:[], :country).try(:[], :state).try(:[], :city)
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Mercurial error: abort no username supplied
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I posted this q/a to hopefully help someone in the future from having to waste time with this nugget.
– Kevin Won
Feb 25 '10 at 4:20
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How to change the docker image installation directory?
From what I can tell, docker images are installed to /var/lib/docker as they are pulled. Is there a way to change this location, such as to a mounted volume like /mnt ?
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Why do we use Base64?
...e email might, with a delivery agent replacing the string of characters "\nFrom " with "\n>From " when it saves the message to a mailbox. Or HTTP headers are newline terminated with no reversible way to escape newlines in the data (line continuation conflates whitespace), so you can't just dump a...
PHP - include a php file and also send query parameters
I have to show a page from my php script based on certain conditions. I have an if condition and am doing an "include" if the condition is satisfied.
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How do I auto size a UIScrollView to fit its content
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Actually, we cannot start unioning from CGRect.zero, it works only if you home some subviews in negative coordinates. You should start union subview frames from the first subview, not from zero. For instance, you have just one subview which is an UIView with ...
How to get the screen width and height in iOS?
...hout padding. Simply subtract your app's padding (usually 20 on each side) from these results to get the 'usable' space for most elements
– Nick Daugherty
Aug 30 '12 at 16:25
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embedding image in html email
...eate one easily at:
http://www.motobit.com/util/base64-decoder-encoder.asp from a image file.
Email source code looks something like this, but i really cant tell you what that boundary thing is for:
To: email@email.de
Subject: ...
Content-Type: multipart/related;
boundary="------------09030302...
Skip a submodule during a Maven build
...nted out, as of Maven 3.2.1 you have a new -el flag that excludes projects from the reactor, similarly to what -pl does:
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How to set the thumbnail image on HTML5 video?
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The issue with this is that the video starts from specified #t=0.5. Say if you wanted thumbnail from t=8 well then vid would start from 8th second which is not ideal is it :)
– Marko
Apr 18 '19 at 10:31
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