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How do you setup minimum number of comparisons in general?
Started by dksjalk on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
If you're in doubt Knuth's The Art of Computer Programming... .
The lower bound for the number of comparisons is six:
http://en.wikipedia.org/wiki/Selection%5Falgorithm
In this case, the actual minimum number of required comparisons is also six .
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If you have 5 distinct numbers, how many comparisons at most do you need to sort this using merge sort?
Answer Snippets (Read the full thread at stackoverflow):
You can merge two pairs of lists with 2 comparisons....
Initially you have five 1-long lists.
According to Wikipedia : In the worst case, merge sort does an amount of comparisons equal, I suppose the worst case number of comparisons is L1+L2-1.
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Design an efficient algorithm to sort 5 distinct - very large - keys less than 8 comparisons in the worst case. You can't use radix sort.
Answer Snippets (Read the full thread at stackoverflow):
I suggest from above by the comparison reveals an obvious structure for the first comparisons, but it becomes B D A / \ B C E - 1 Comparison....
To hard-code a comparison sequence because of the low number of required comparisons.
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Ask your Facebook Friends
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Python supports an elegant syntax for "chained comparisons", for example:
0 <= n < 256
meaning,
0 <= n and n < 256
Knowing that it's a fairly flexible language syntactically, is it possible to emulate this feature in Scala?
Started by Matt R on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You need, then, four ....
So we need to call the "<=" and "<" methods on an object, and each such method receives a parameter .
One have to remember that, aside from a few keywords, everything in Scala is a method invokation on an object .
Not really.
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I am a Java guy and therefore would prefer a Java based framework for an auction site that I am planning to develop from scratch. But all my colleagues and friends have pointed out to me that the better sites that are coming up now-a-days are mostly written...
Started by Drunken Programmer on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
For example, the PetShop comparisons between Java what you know.)
I think that the most important performance comparison to do is to compare but an indication that it is possible.
I haven't seen any good performance comparisons.
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When I have to implement equality comparers for
public class SampleClass { public int Prop { get; set; } }
Should I make
null == new SampleClass()
and
new SampleClass() == null
and
new SampleClass().Equals(null)
false?
And what about
new SampleClass()...
Started by Jader Dias on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
Can you.
SampleClass()
doesn't really make any sense (and, really, none of the other comparisons do).
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Why do comparisons of NaN values behave differently from all other values? That is, all comparisons with the operators ==, <=, >=, <, > where one or both values is NaN returns false, contrary to the behaviour of all other values.
I suppose...
Started by starblue on
, 11 posts
by 11 people.
Answer Snippets (Read the full thread at stackoverflow):
Comparisons....
Therefore all comparisons return false if the operands' formats differ.
Thus, they can't is greater or less than another undefined value .
The comparisons for floating point numbers compare numeric values.
Result in null.
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I need some help with my CS homework. I need to write a sorting routine that sorts an array of length 5 using 7 comparisons in the worst case (I've proven that 7 will be needed, because of the height of the decision tree).
I considered using the decision...
Started by CS n00b on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Consider....
EDIT:
I don't think this is going to work: Step 4 is broken, and might require an 8th comparison.
If the initial comparison resulted in the remaining element comparisons.
It correctly using the remaining two comparisons.
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Possible Duplicates:
== Operator and operands
How to check for equals? (0 == i) or (i == 0)
Why does one often see “null != variable” instead of “variable != null” in C#?
I saw many people suggesting to put constants on the left side in all comparisons...
Answer Snippets (Read the full thread at stackoverflow):
I also think that putting in a single "=" rather than two is a mistake that you'll catch if you have any decent testing environment .
I personally think "value == 0" is more readable (English: "value is equal to 0" rather than "0 is equal to value") .
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I have a custom object that maps a boolean value from a legacy database to a C# bool (and back again).
My custom bool object looks like this:
public class S2kBool : IUserDefinedType { public bool Value { get; set; } public Type SupportedType { get { return...
Started by David Brown on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
True/false operators (note I prefer the implicit bool conversion myself):
public static bool operator true(S2kBool x) { ... .
There are 2 things to look at; an implicit conversion operator (in S2kBool ) to bool , or the true / false operators themselves.. .
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