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How to check if a model has a certain column/attribute?
...tring name of your attribute.
In this case: Number.column_names.include? 'one'
For an instance
Use record.has_attribute?(:attr_name) or record.has_attribute?('attr_name') (Rails 3.2+) or record.attributes.has_key? attr_name.
In this case: number.has_attribute?(:one) or number.has_attribute?('one...
adb server version doesn't match this client
...wer. It started after updating android studio. I was going crazy with this one, reinstalled the sdk and everything. I thought it was a bug in the new version.
– TacoEater
Dec 24 '14 at 20:19
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setTimeout in for-loop does not print consecutive values [duplicate]
... in the OP and in my answer, and the time delay value is the same for each one, then once that amount of time has elapsed all the timer handlers will be called one after another in rapid succession.
If what you need is for the handlers to be called at intervals, you can either use setInterval(), wh...
How do you represent a graph in Haskell?
... Knot to get around this, but that makes my brain hurt (because I haven't done much of it yet). I've done more of my substantial programming in Mercury than Haskell so far, and Mercury is strict so knot-tying doesn't help.
Usually when I've run into this before I've just resorted to additional indi...
Advantages of stateless programming?
...een learning about functional programming (specifically Haskell, but I've gone through tutorials on Lisp and Erlang as well). While I found the concepts very enlightening, I still don't see the practical side of the "no side effects" concept. What are the practical advantages of it? I'm trying to t...
How to encrypt String in Java
...is to encrypt string which will show up in 2D barcode(PDF-417) so when someone get an idea to scan it will get nothing readable.
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Git branch strategy for small dev team [closed]
... of code, where code in a less stable branch will eventually "graduate" to one considered more stable after testing and general approval by your team.
Step by step, your workflow under this model might look like this:
You need to fix a bug.
Create a branch called myfix that is based on the develo...
What is
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It means that T must implement Comparable<T itself or one of T's superclasses>
The sense is that because SortedList is sorted, it must know how to compare two classes of its generics T parameter. That's why T must implement Comparable<T itself or one of T's superclasses>...
Avoid Android Lint complains about not-translated string
...rilLeroux answer is more comprehensive and should be marked as the correct one because it shows the option of putting all the non translatable strings in one file.
– Yoel Gluschnaider
Jan 27 '16 at 17:12
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nonlocal keyword in Python 2.x
... but it seems like this keyword is not available in python 2.x. How should one access nonlocal variables in closures in these versions of python?
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