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

I am sorry if my words offends you, but I am telling my opinion or the truth.

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):
How to use `all`,
``````# Real world application