Linked Questions

8
votes
2answers
161 views

Timing: extracting from List VS extracting from Association

I was wondering, why is extracting from an Association slightly faster than extracting from a List? ...
2
votes
3answers
82 views

Interdependent SetterBars with symbolic contents

In this question, I learned how to cascade or nest interdependent Setter and SetterBar controls with numerical Ranges. The ...
9
votes
1answer
105 views

How to efficiently write into PackedArrays that are stored in Associations?

Using Association to generate complicated data types is very comfortable, in particular if one uses those tricks from How to make use of Associations?. However, I ...
0
votes
1answer
57 views

How does one create getter methods that depend on a variable (besides its argument)?

In the (as always) insigthful answer by Leonard Shifrin to this MMA SE post https://mathematica.stackexchange.com/questions/52393/how-to-make-use-of-associations ...
2
votes
0answers
94 views

List, Association, and Dataset, according to what principles to choose which one to use?

List, Association and Dataset are three 'objects' that can be used to store data in MMA. So ...
4
votes
1answer
173 views

Create tree association using table

Suppose I have a table like the following (This example is simplified, actual table is much larger), it is read from external files: ...
38
votes
1answer
2k views

Which Object-oriented paradigm approach to use in Mathematica?

Which Object-Oriented Paradigm (OOP) approach to use in Mathematica for: general implementation, or a particular project? There are a lot of related questions and answers in MSE on doing OOP that ...
3
votes
1answer
190 views

Using Associations and Pattern matching in numerical functions possibly broken

It looks like the very young feature of pattern matching (/replacing) within Associations (https://mathematica.stackexchange.com/a/119542/6804), with or without ...
3
votes
3answers
1k views

Assigning to multiple variables in a list the values in another list

I have two lists, one contains the variables and the other the corresponding values that the variables should take. ...
15
votes
6answers
682 views

Reshaping associations, generalization of GroupBy

Let's say we have a set a\of associations: ...
7
votes
0answers
96 views

Time complexity to choose the right overload from the memoized function

If we want to save some outputs of the function, we often use the memoization pattern as follows, f[x_]:=f[x]=x f/@Range[10^5] If I call this function many times ...
7
votes
1answer
232 views

How does thing[“property”] syntax work?

Many builtin "things" support the (usually undocumented) syntax thing["property"], and usually the available properties can be listed using thing["Properties"] (thing["Methods"] might work too). ...
9
votes
4answers
334 views

Create Nested List from tabular data

Im trying to create a nested list from tabular data, then onward into a nested association. I can get part way with the help of this answer but it only works for the first level. Repeated use of this ...
47
votes
2answers
3k views

Memoization with pure functions?

Is this possible? If I have a simple function, say: f=If[#>0,1,2]& then for each value of # this will re-evaluate f right? Is it possible to define a ...
5
votes
1answer
300 views

Does Mathematica support an unordered set (e.g. hashset) data structure?

Does Mathematica support any data structure representing an unordered set (without multiplicity) of Mathematica expressions? I would like this data structure to support $O(1)$ insertion, deletion, and ...

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