function arrayPreviousLess(nums) {
// write code here.
// console.log(nums);
const arraryAnswer = [];
for(let i = 0; i < nums.length; i++) {
// console.log(nums[i-1]);
if(nums[i-1] < nums[i]) {
arraryAnswer.push(nums[i-1])
} else {
arraryAnswer.push(-1);
}
}
// console.log(arraryAnswer);
return arraryAnswer;
}
/**
* Test Suite
*/
describe('arrayPreviousLess()', () => {
it('shift previous postions from the left to a smaller value or store -1', () => {
// arrange
const nums = [3, 5, 2, 4, 5];
// act
const result = arrayPreviousLess(nums);
// log
console.log("result: ", result);
// assert
expect(result).toEqual([-1, 3, -1, 2, 4]);
});
});