picolo 0.3.7

A simple crate for breaking down images into its bareboned data. Uses the fantastic image crate.
Documentation 
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/// Listops is designed for reading and writing from vectors and its elements

// Helper function for finding largest element in a given vector. Also gives a base value of 300
pub fn find_largest_elem(vec: &Vec<i32>) -> i32 {
    let mut min_value = *vec.iter().max().unwrap();
    min_value + 300
}

// Helper function for finding the smallest 
pub fn find_smallest_elem(vec: &Vec<i32>) -> i32 {
    let mut min_value = *vec.iter().min().unwrap();
    min_value
}

// Turns all elements into posititive First, then finds largest element, returns as negative if that was the initial element
pub fn find_largest_abs_elem(vec: Vec<i32>) -> i32 {
    let abs_max = vec
        .iter()
        .max_by(|x, y| x.abs().partial_cmp(&y.abs()).unwrap())
        .unwrap();
    *abs_max + 300
}

// Find median in a vector
pub fn median_vec(array: &Vec<i32>)->f64{
    if (array.len() % 2)==0 {
        let ind_left = array.len()/2-1; 
        let ind_right = array.len()/2 ;
        (array[ind_left]+array[ind_right]) as f64 / 2.0

    } else {
        array[(array.len()/2)] as f64
    }
}

// Round a number to the requested number of decimal points
pub fn round(x: f32, decimals: u32) -> f32 {
    let y = 10i32.pow(decimals) as f32;
    (x * y).round() / y
}

// Check if a vector has a negative element
pub fn has_negative_elem(_vec_x: &Vec<i32>) -> bool {
    let mut has_neg = false;
    for i in _vec_x {
        if i < &0 {has_neg = true};
    }
    has_neg
}

// Check if a vector has a positive element
pub fn has_positive_elem(_vec_x: &Vec<i32>) -> bool {
    let mut has_neg = false;
    for i in _vec_x {
        if i > &0 {has_neg = true};
    }
    has_neg
}

// The function that's calling this should check if input is positive or negative to keep this code to a minimum
pub fn switch_sign(num: &i32) -> i32 {
    let new_num = num * -1;
    new_num
}