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How get integer value from a enum in Rails?
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You can get the integer values for an enum from the class the enum is on:
Model.sale_infos # Pluralized version of the enum attribute name
That returns a hash like:
{ "plan_1" => 1, "plan_2" => 2 ... }
You can then use the sale_info value from an instance ...
Reading a binary file with python
...o have something to unpack is pretty trivial:
import struct
data = open("from_fortran.bin", "rb").read()
(eight, N) = struct.unpack("@II", data)
This unpacks the first two fields, assuming they start at the very beginning of the file (no padding or extraneous data), and also assuming native byt...
Get Slightly Lighter and Darker Color from UIColor
...ibility, these methods should be implemented as an UIColor category. Also, from @Riley's idea, it may be a better idea to make the color proprtionally darker or lighter instead of adding or subtracting constant values. As @jrturton pointed out, it's not necessary to manipulate the RGB components; it...
Reliable way for a Bash script to get the full path to itself [duplicate]
...lso that esoteric situations, such as executing a script that isn't coming from a file in an accessible file system at all (which is perfectly possible), is not catered to there (or in any of the other answers I've seen).
sh...
What are the advantages of using nullptr?
...ro defined in certain standard library header files.
The origin of NULL is from C and C++ inherited it from C. The C standard defined NULL as 0 or (void *)0. But in C++ there is a subtle difference.
C++ could not accept this specification as it is. Unlike C, C++ is a strongly typed language (C does...
Git: copy all files in a directory from another branch
How do I copy all files in a directory from another branch? I can list all of the files in that directory by doing
2 Answe...
Fast Bitmap Blur For Android SDK
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For future Googlers, here is an algorithm that I ported from Quasimondo. It's kind of a mix between a box blur and a gaussian blur, it's very pretty and quite fast too.
Update for people encountering the ArrayIndexOutOfBoundsException problem : @anthonycr in the comments provides...
Convert from java.util.date to JodaTime
...rry out subtractions between dates. Is there a good concise way to convert from Date to JodaTime ?
2 Answers
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From Arraylist to Array
I want to know if it is safe/advisable to convert from ArrayList to Array?
I have a text file with each line a string:
9 An...
Converting a column within pandas dataframe from int to string
... This is appealing, but it is about 4x slower than apply(str) from @Jeff, in my test using pd.Series(np.arange(1000000)).
– John Zwinck
Aug 1 '16 at 22:01
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