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Is there an opposite of include? for Ruby Arrays?
...name)
...
end
ActiveSupport adds the exclude? method to Array, Hash, and String. This is not pure Ruby, but is used by a LOT of rubyists.
Source: Active Support Core Extensions (Rails Guides)
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NullPointerException accessing views in onCreate()
...d-generated code.
The view is in the fragment layout (fragment_main.xml) and not in the activity layout (activity_main.xml). onCreate() is too early in the lifecycle to find it in the activity view hierarchy, and a null is returned. Invoking a method on null causes the NPE.
The preferred solution...
Reverse of JSON.stringify?
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JSON.stringify and JSON.parse are almost oposites, and "usually" this kind of thing will work:
var obj = ...;
var json = JSON.stringify(obj);
var obj2 = JSON.parse(json);
so that obj and obj2 are "the same".
However there are some lim...
Export a graph to .eps file with R
...e? I typically export my graphs to a .pdf file (using the 'pdf' function), and it works quite well. However, now I have to export to .eps files.
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Self-references in object literals / initializers
...To complete my above statement, since foo is beeing declared as a variable and c will only be evaluated at the time it is invoked, using foo inside c will work, as opposed to this (be careful though)
– Bernardo Dal Corno
Apr 19 '18 at 20:11
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How do I prevent Eclipse from hanging on startup?
...cked the files that Eclipse was polling against with SysInternals Procmon, and found that Eclipse was constantly polling a fairly large snapshot file for one of my projects. Removed that, and everything started up fine (albeit with the workspace in the state it was at the previous launch).
The fil...
What is Rack middleware?
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Rack as Design
Rack middleware is more than "a way to filter a request and response" - it's an implementation of the pipeline design pattern for web servers using Rack.
It very cleanly separates out the different stages of processing a request - separation of concerns being a key goal of all w...
Why not use HTTPS for everything?
If I was setting up a server, and had the SSL certificate(s), why wouldn't I use HTTPS for the entire site instead of just for purchases/logins? I would think it would make more sense just to encrypt the entire site, and protect the user entirely. It would prevent problems such as deciding what has ...
JSON and XML comparison [closed]
I want to know which is faster: XML and JSON?
When to use which one ?
6 Answers
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CABasicAnimation resets to initial value after animation completes
I am rotating a CALayer and trying to stop it at its final position after animation is completed.
15 Answers
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