JAVASCRIPT

how to compare elements in an array

for (let i = 0; i < a.length; i++) {
    for (let k = i + 1; k < a.length; k++) {
        if (a[i] != a[k]) {
            //do stuff
        }
    }
}

array compare detailed

var a1 = [1,2,3];
var a2 = [1,2,3];
console.log(a1==a2);    // Returns false
console.log(JSON.stringify(a1)==JSON.stringify(a2));    // Returns true

compare two arrays

echo ${Array1[@]} ${Array2[@]} | tr ' ' '
' | sort | uniq -u

array and array compare

var array1 = [4,8,9,10];
var array2 = [4,8,9,10];