Hello Constructions in Processing

Processing
1

hello developers (of processing)
let’s do some opportunity to other developers create some cycles and constructons (construsions like if, else if, else …)
im have an workpiece for that

let’s create an match-case like in python

void match(Unlinted what) [!endless case(Unlinted with)] [this.code, this.argument] {
    for (Unlinted i = 0; i <= case.length;i++) {
        if (match.argument == case[i].argument || case[i].argument == null) {
            eval(case[i].code);
            break;
        }
    }
}

this will be like that

match ("youre argument1") {
    // this part of code just ignores
} case ("youre argument2") {
    // match-case do this part of code and go out of match-case, if youre argument1 == youre 
    // argument2
} case ("youre argument3") {
    // same as first case but youre argument 2 is youre argument 3
    // and so forth
} case (null) {
    // this part of code be fulfilled Necessarily
}

and now analysis of the incomprehensible

//Unlinted tipe
//this tipe is tipe for unlinted tipe of variable

// void [] []

// first [] is tipes of additional constructions like else if and else for if
// also !endless and endless is types of additional constructions
// !endless is not break the constuction after doing
// endless is break the constuction after doing
// enother part of first [] is name of additional construction and arguments

// second [] is a code and argument notation
// first is code and second is arguments

// eval just do code in quotes

this is just this wery useful construcion for writing code
and will attract the other programers, thanx😊

1 Like
2

Why not use the traditional switch / case? Maybe you are looking for a runtime-modifiable case statement?

1 Like
4

Java has no equivalent to Python’s eval() function so unfortunately it is not possible to achieve what you describe.

1 Like
6

Based on what you have said here and in private PMs you sent to me I believe that you are proposing that the developers of Processing create a match-case construct for Java.

Now @JoseMY asked two valid questions to try and clarify the situation and give you an opportunity to discuss the issue in more detail. Your reply

was less than helpful especially as the code was neither valid Python or valid Java syntax,.

So you are unhappy that Java does not have an eval() function. Well Java has been around since ~1995 without eval() so perhaps there is no real need / demand for it. Both Javascript and Python have an eval() function but they must be used with care because they can pose a security risk.

I am not a Python programmer but my research indicates that the programmer can use pattern matching for the case selectors in match-case where Javas switch-case is mostly restricted to primitive types and String. Something like this in Java would be nice even without the capability of executing arbitrary strings with eval().

1 Like
7

I though the question was javascript (p5js) related, due the use of eval().Maybe you could pass a function object as parameter?

In other words, pass (function){blah blah blah} instead of eval? I have few experience with actual java, most of my code is limited to basic java functions and the processing API.