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List attributes of an object
...ict__
Then you can test what type is with type() or if is a method with callable().
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Difference between rake db:migrate db:reset and db:schema:load
...drop, db:setup
db:migrate:reset does db:drop, db:create, db:migrate
Typically, you would use db:migrate after having made changes to the schema via new migration files (this makes sense only if there is already data in the database). db:schema:load is used when you setup a new instance of your app...
Proper way to declare custom exceptions in modern Python?
...tionError(Exception):
def __init__(self, message, errors):
# Call the base class constructor with the parameters it needs
super(ValidationError, self).__init__(message)
# Now for your custom code...
self.errors = errors
That way you could pass dict of error me...
Application Loader: “Cannot proceed with delivery: an existing transporter instance is currently upl
...Tunes Connect.
The token files now appear in the
Library/Caches/com.apple.amp.itmstransporter/UploadTokens/ subfolder of the given user's home directory. Which, honestly, is a better place for them anyway.
Delete any .token files in this directory.
--
If you are unable to find the .token files, th...
`date` command on OS X doesn't have ISO 8601 `-I` option?
In a Bash script, I want to print the current datetime in ISO 8601 format (preferably UTC), and it seems that this should be as simple as date -I :
...
Why is “if not someobj:” better than “if someobj == None:” in Python?
...a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly used, or an int value that is considered False if equal to zero.
Otherwise, if the object has a __len__ special method (as do container built-ins, li...
Tuples( or arrays ) as Dictionary keys in C#
...uple<T, U, W> other)
{
return other.first.Equals(first) && other.second.Equals(second) && other.third.Equals(third);
}
}
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How to convert a string to integer in C?
...sted in strtoumax and strtoimax which are standard functions in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall be equivalent to:
(int...
Is there a C# type for representing an integer Range?
...at if you need a range of Doubles, or a range of some custom class?) For example:
/// <summary>The Range class.</summary>
/// <typeparam name="T">Generic parameter.</typeparam>
public class Range<T> where T : IComparable<T>
{
/// <summary>Minimum value ...
JavaScript: Create and save file [duplicate]
... @Banjocat You should check if the browser support certain objects. Example detecting: if("URL"in window&&"createObjectURL"in URL&&"download"in Element.prototype): else then you just change the downloading method or notice that the browser doesn't support the needed objects to d...