VEX Array Functions

array_functions.h

function int[] swap (int arr1[]; int arr2[]) {
    int temp[] = arr1;
    arr1 = arr2;
    arr2 = temp;
    return {1};
}


function int swap (int x; int y) {
    int tmp = x;
    x = y;
    y = tmp;
    return 1;
}


function int[] unique_elements (int arr[]) {
    int _arr[] = sort(arr);
    for (int i=0; i<len(_arr); i++) {
        while(_arr[i] == _arr[i+1]) pop(_arr,i);
    }
    return _arr;
}


function int[] duped_elements (int arr[]) {
    int _arr[] = sort(arr);
    int result[] = {};
    int dupe;
    for (int i=0; i<len(_arr); i++) {
        while(_arr[i] == _arr[i+1]) {
            dupe = pop(_arr,i);
        }
        append(result, dupe);
    }
    return result;
}


function int[] common_elements (int arr1[]; int arr2[]) {
    int result[];
    foreach (int i; unique_elements(arr1)) {
        foreach (int j; unique_elements(arr2)) {
            if (i==j) push(result,j);
        }
    }
    return result;
}


function int[] different_elements (int arr1[]; int arr2[]) {
    int result[];
    int _arr1[] = unique_elements(arr1);
    int _arr2[] = unique_elements(arr2);
    foreach(int i; _arr1) {
        if(find(_arr2,i)<0) append(result,i);
    }
    foreach(int j; _arr2) {
        if(find(_arr1,j)<0) append(result,j);
    }
    return result;
}


function int[] inside_elements (int src[]; int search[]) {
    int result[];
    int _src[] = unique_elements(src);
    int _search[] = unique_elements(search);
    foreach(int i; _search) {
        if(find(_src,i)>=0) append(result,i);
    }
    return result;
}


function int[] merge_arrays ( int arr1[]; int arr2[]) {
    int result[];
    append(result,arr1);
    append(result,arr2);
    return unique_elements(result);
}


function int[] remove_from (int arr1[]; int arr2[]) {
    int result[]=arr2;
    int _arr1[]=unique_elements(arr1);
    foreach(int i; _arr1) {
            while(removevalue(result,i)){
                continue;
            }
    }
    return result;
}

function int count_elements (int arr[]; int elem ) {
    int results[] = find(arr, elem);
    return len(results);
}