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Multidimensional Array [][] vs [,] [duplicate]
...
One is an array of arrays, and one is a 2d array. The former can be jagged, the latter is uniform.
That is, a double[][] can validly be:
double[][] x = new double[5][];
x[0] = new double[10];
x[1] = new double[5];
x[2] = new double[3];
x[3] = new d...
Override devise registrations controller
... # add custom create logic here
end
def update
super
end
end
And then tell devise to use that controller instead of the default with:
# app/config/routes.rb
devise_for :users, :controllers => {:registrations => "registrations"}
...
Can I simultaneously declare and assign a variable in VBA?
I'm new to VBA and want to know if I can convert the following declaration and assignment into one line:
5 Answers
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What is the difference between mocking and spying when using Mockito?
...rtial mocks.
Before release 1.8 spy() was not producing real partial mocks and it was confusing for some users. Read more about spying: here or in javadoc for spy(Object) method.
callRealMethod() was introduced after spy(), but spy() was left there of course, to ensure backward compatibility.
Other...
Archives not showing up in Organizer for Xcode 4
...t use archive. It will show up then.
In the scheme editor, edit the scheme and go to the Archive tab, make sure the check box for show in Organizer is checked.
In the archive tab in the scheme editor check the build configuration used for archiving. Make sure it has the right entitlements file &...
Quick Sort Vs Merge Sort [duplicate]
...e its inner loop can
be efficiently implemented on most
architectures, and in most real-world
data, it is possible to make design
choices which minimize the probability
of requiring quadratic time.
Note that the very low memory requirement is a big plus as well.
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When should I use the “strictfp” keyword in java?
...rict expressions must be
those predicted by IEEE 754 arithmetic
on operands represented using single
and double formats. Within an
expression that is not FP-strict, some
leeway is granted for an
implementation to use an extended
exponent range to represent
intermediate results; the n...
how to use javascript Object.defineProperty
...ed to find EVERY occurence of the discount modification in the client code and add a line
if(obj.discount>80) obj.discount = 80;
Then the e-shop owner may further change his strategy, like "if the customer is reseller, the maximal discount can be 90%". And you need to do the change on multiple...
Selecting a row of pandas series/dataframe by integer index
I am curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work.
6 Answers
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part.
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