Questions on how to write code in a better or different style, using Mathematica's capabilities for coding in multiple styles.

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77
votes
3answers
9k views

Alternatives to procedural loops and iterating over lists in Mathematica

While there are some cases where a For loop might be reasonable, it's a general mantra – one I subscribe to myself – that "if you are using a ...
64
votes
7answers
6k views

Struct equivalent in Mathematica?

I really miss having something like a struct in Mathematica. I know of (and regularly use) a couple of programming techniques which feel like a ...
67
votes
7answers
3k views

Can one identify the design patterns of Mathematica?

... or are they unnecessary in such a high-level language? I've been thinking about programming style, coding standards and the like quite a bit lately, the result of my current work on a mixed ...
5
votes
1answer
245 views

Alternative to overloading Set

In the ideas shared in my answer to this post Struct equivalent in Mathematica? at the end I propose a solution that changes the way Set works in a particular case that can be expressed in plain words ...
31
votes
5answers
568 views

Placement of Condition /; expressions

It is my practice to place Condition expressions on the left side of := and :> in almost ...
13
votes
4answers
362 views

Short syntax for accessing System`Utilities`HashTableAdd and System`Utilities`HashTableGet

I have a need for a struct analogue in Mathematica. After reading this post I came to the conclusion that System`Utilities`HashTable is one of the best options. But ...
19
votes
2answers
1k views

Extracting values from nested rules in JSON data

I have been using Mathematica to analyse some data from the StackExchange API. It is conveniently available in JSON form, which Mathematica interprets as replacement rules. However, some of the rules ...
11
votes
3answers
401 views

With versus Function

I've seen people compare Block with Module and With as scoping constructs, and try to figure ...
22
votes
9answers
3k views

Programming paradigm change

I'm new to Mathematica, I've been learning by myself, and, being a Java developer for some time, it makes it hard to adapt. I've tried to solve a Reddit challenge, and I came up with this solution: ...
11
votes
2answers
306 views

Notebook formatting - easier descriptions for equations and results?

When I do computations in mathematica, I generally try to make it readable for myself-in-the-future. This can be a cumbersome task in mathematica, where it often requires me to switch betwee a text ...
12
votes
2answers
217 views

f[arg1, arg2,…,argN] vs. f[{arg1, arg2,…,argN}]

I am trying to reproduce the API of a function (written in R) that accepts an arbitrary number of arguments and handles it the same way as it would handle a single argument that is a list of different ...
6
votes
4answers
811 views

Alternatives to While Loops?

I am using Mathematica to run a probabilistic simulation. Essentially, I have a list of members of a population (they only have one, numerical, attribute, so it's just implemented as a list of ...
23
votes
3answers
796 views

Getting serious about Mathematica programming

I'm at a point in my Mathematica journey where I need to be a little bit more strategic about my coding. Presently, I have a bunch of notebook files organized using the filesystem of the OS and ...
12
votes
2answers
728 views

Speeding up random walk for many particles

I am trying to speed up this code for many particles to take a random walk. I'm not sure why it is so slow for such a simple task. I got a few hints from colleagues to reduce the precision of the ...
16
votes
1answer
297 views

Are there advantages to using additional arguments of common functions rather than alternative ways of calculating with lists?

(Apologies for the long question title.) One of the interesting, if sometimes confusing, things about Mathematica is that there is always more than one way to do things. Even intermediate users can ...
9
votes
2answers
829 views

How to write data from Mathematica to an existing formated Excel file?

I have a sheet in an Excel file already formated: different colors, fonts, columns width and cells styles. I want to fill-out values from Mathematica into specific cells of that sheets, or use that ...
10
votes
2answers
446 views

What's the most “functional” way to do Cholesky decomposition?

I can do Cholesky in a procedural style, such as: ...
11
votes
2answers
403 views

Are there advantages to using generalized Part extraction instead of specialized functions like First, Last?

There are many ways to extract different parts of lists in Mathematica. For example, the first part of a list v can be accessed either as ...
9
votes
5answers
360 views

An elegant way to plot a numeric function that returns a list, and have each element in a different color

I have a function that takes a numeric argument and returns a list of numbers. I want to plot each element of the list in a different color. If I use this command, ...
5
votes
1answer
176 views

How to find the name of the current function

I would like to know the name of the current function from within that function. For example, consider the following code ...
12
votes
4answers
337 views

Equivalent Nested Loop Structure

Consider the following examples: ...
8
votes
3answers
339 views

Can this code be written in a more functional style

Referencing this question, I wonder if the following code can be written more concisely using a functional style, i.e. without For loops or ...
2
votes
1answer
89 views

Writing a function to mimic Characters

I am working my way through Programming Paradigms via Mathematica (A First Course) and have answered the following question in lesson 25: Write a function of one argument "s", a String, which ...
1
vote
1answer
91 views

Looping with NDSolve?

I have a series of PDE equations that are solved with NDSolve for certain variables $a$ and $b$ - Now, I want to see the output at a time $t$ as $a$ and $b$ change; so I was thinking of a loop ...