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advantage of tap method in ruby
..., discard any variable definitions made in the process once the block has done its job. And should there be just one method called on the object, you can write User.new.tap &:foobar
– Boris Stitnicky
Jul 5 '13 at 17:21
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How do you do block comments in YAML?
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The spec only describes one way of marking comments:
An explicit comment is marked by a “#” indicator.
That's all. There are no block comments.
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How to detect a Christmas Tree? [closed]
...with many of the other answers, I assumed that the Christmas tree would be one of the brighter objects in the scene, so the first threshold is just a simple monochrome brightness test; any pixels with values above 220 on a 0-255 scale (where black is 0 and white is 255) are saved to a binary black-a...
How do I round to the nearest 0.5?
...41,823rd, I can't think of a single use case where you would care if it's "one billion one and a half" or "one billion one" - if that's really a problem then there is something inherently flawed with the ranking scheme :)
– John Rasch
Aug 25 '09 at 18:52
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SQL “between” not inclusive
...o dates. The second date is interpreted as midnight when the day starts.
One way to fix this is:
SELECT *
FROM Cases
WHERE cast(created_at as date) BETWEEN '2013-05-01' AND '2013-05-01'
Another way to fix it is with explicit binary comparisons
SELECT *
FROM Cases
WHERE created_at >= '2013-0...
How is Docker different from a virtual machine?
... you can have a read only part and a write part which are merged together. One could have the common parts of the operating system as read only (and shared amongst all of your containers) and then give each container its own mount for writing.
So, let's say you have a 1 GB container image; if you ...
Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a work
...e cause of the “Workspace in use or cannot be created, chose a different one” issue is that the real path to your workspace may have changed.
In my case, the real location of the workspace had changed, but I had used a symlink to make it look like it was in the same location. I saw errors in l...
What does `m_` variable prefix mean?
...ssumed to be getName/setName, so getM_name is bad and you need handle them one by one.
– Leon
Jan 11 '19 at 5:53
Thank...
What's the difference between SoftReference and WeakReference in Java?
...renced by a SoftReference if there isn't pressure on the available memory. One detail: the policy for the "-client" and "-server" JRE's are different: the -client JRE tries to keep your footprint small by preferring to clear SoftReferences rather than expand the heap, whereas the -server JRE tries t...
Class does not implement its superclass's required members
... the point of this class. This class simply cannot be instantiated without one. It is going to analyze the collection and initialize a dozen instance variables. That is the whole point of this being the one and only designated initializer! Thus, init(coder:) has no meaningful (or even meaningless) M...