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Java recursive Fibonacci sequence
...ci(2) = fibonacci(1) + fibonacci(0)
Now you already know fibonacci(1)==1 and fibonacci(0) == 0. So, you can subsequently calculate the other values.
Now,
fibonacci(2) = 1+0 = 1
fibonacci(3) = 1+1 = 2
fibonacci(4) = 2+1 = 3
fibonacci(5) = 3+2 = 5
And from fibonacci sequence 0,1,1,2,3,5,8,13,21....
Implement Stack using Two Queues
...eue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch the names of queue1 and queue2
pop:
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How to determine if a number is a prime with regex?
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You said you understand this part, but just to emphasize, the String generated has a length equal to the number supplied. So the string has three characters if and only if n == 3.
.?
The first part of the regex says, "any character, zero or o...
Adding an identity to an existing column
I need to change the primary key of a table to an identity column, and there's already a number of rows in table.
19 Answe...
Django gives Bad Request (400) when DEBUG = False
... I change DEBUG to False in the settings file, then the server stopped and it gives the following error on the command prompt:
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SQL Client for Mac OS X that works with MS SQL Server [closed]
...don't really need a GUI, but it would be nice to have for the color coding and resultset grid. I'd rather not have to use a VM.
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Float vs Decimal in ActiveRecord
...ation defines floats in binary format. Basically, it stores sign, fraction and exponent to represent a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
That's why there is a Decimal for...
Difference between Xcode version (CFBundleShortVersionString) and build (CFBundleVersion)
...you might tack something else on to the CFBundleVersion, maybe another dot and integer.
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Difference between DateTime and Time in Ruby
What's the difference between DateTime and Time classes in Ruby and what factors would cause me to choose one or the other?
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Procedure expects parameter which was not supplied
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I would check my application code and see what value you are setting @template to. I suspect it is null and therein lies the problem.
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