DEV Community: Muhammad Faran Aiki

How to use "any" and "all" in Python

Muhammad Faran Aiki — Wed, 16 Jun 2021 15:22:59 +0000

Credential: I do not know, but I, at least, am 4 years experienced; I am still learning C and Assembly.

What is any and all in Python?

By Python definition, any will return if there is an item whereby true in a list, whereas all will return if all items are true in a list.

It looks like the operator or and and for any and all. It is actually easy to implement in C, Assembly, or any other language.

Here are examples of the function any,

any([true, false, false])   # Result in True
any([false, false, false])  # Result in False

Here are examples of the function all,

all([true, true, true])     # Result in True
all([true, true, false])    # Result in False

Implementation in C for any,

// My algorithm for "any"
int any(int* arr, int size) {
    int i = 0, t = 0;
    for (; i < size - 1 ; i += 2) {
        t += arr[i] + arr[i + 1];
    }
    return (t + arr[size % i]) && 1;
}

With a O(log n) time complexity and O(1) space complexity.

Implementation in C for all,

// My algorithm for "all"
int all(int* arr, int size) {
    int i = 0, t = 0;
    for (; i < size - 1 ; i += 2) {
        t += arr[i] + arr[i + 1];
    }
    return (t + (i % size && arr[size % i]) > (i >> 1));
}

With a O(log n) time complexity and O(1) space complexity.

I will explain how the algorithm works in another post.

How to use any,

# Real world application
if any(person.alive for person in people):
    myself.shout("Who is dead?")

How to use all,

# Real world application
if all(person.alive for person in people):
    myself.shout("We are safe!")

Why I prefer this style

Muhammad Faran Aiki — Sat, 12 Jun 2021 15:18:54 +0000

I prefer,

#include <stdio.h>

int main() {
  printf("I prefer this");
}

More than this

#include <stdio.h>

int main()
{
  printf("I do not prefer this");
}

Because the line is less than the previous. Note, that I did not mention the size is lesser than the previous, they both are the same size.
But of course, it is up to the developer, coder, or the programmer to decide which style they use. I was just sharing my opinion.

Hard to find Assembly topic

Muhammad Faran Aiki — Sat, 12 Jun 2021 12:23:52 +0000

Man, it is really hard to find documentation on how to make an Operating System.
No, what I meant by that is understanding, not just copy-paste (well, except GDT and its similar).
Maybe I am too stupid to understand an easy thing, or too lazy to read the full topic.

Is Python (and similar) really a programming language?

Muhammad Faran Aiki — Sat, 12 Jun 2021 12:20:42 +0000

For some reason, maybe because of my ego, I sometimes do not think that Python (and its similar) is a programming language.
Maybe because Python (and its similar) is a high-level programming language and near pseudo-code? I do not know.
It is not really that bad, but I do not consider it as an "achievement" if I master it or know anything about it.
Not only that, Python is far away from the Zen of Python (the latest version).