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Difference between Big-O and Little-O Notation
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f ∈ O(g) says, essentially
For at least one choice of a constant k > 0, you can find a constant a such that the inequality 0 <= f(x) <= k g(x) holds for all x > a.
Note that O(g) is the set of all functions for which this condition holds.
f ∈ o(g) says, essentially
Fo...
What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3] ?
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Convert Set to List without creating new List
... see that if you want to have a Map with Lists as values, in order to have k different values, you need to create k different lists.
Thus: You cannot avoid creating these lists at all, the lists will have to be created.
Possible work around:
Declare your Map as a Map<String,Set> or Map<Str...
Create two blank lines in Markdown
I am adding Markdown support to my CMS editor.
15 Answers
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Java: Integer equals vs. ==
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The JVM is caching Integer values. Hence the comparison with == only works for numbers between -128 and 127.
Refer: #Immutable_Objects_.2F_Wrapper_Class_Caching
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Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
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Let's improve stacker's example and use Scala's case classes:
case class Person(firstName: String, lastName: String)
The above Scala class contains all features of the below Java class, and some more - for example it supports pattern matchi...
A Java collection of value pairs? (tuples?)
I like how Java has a Map where you can define the types of each entry in the map, for example <String, Integer> .
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How do I convert a dictionary to a JSON String in C#?
...ert my Dictionary<int,List<int>> to JSON string. Does anyone know how to achieve this in C#?
13 Answers
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Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
I am making some matrix multiplication benchmarking, as previously mentioned in
Why is MATLAB so fast in matrix multiplication?
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How can I install an older version of a package via NuGet?
I want to install an older version of a package ( Newtonsoft.Json ). But NuGet rolls back:
5 Answers
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