Perform String Shifts

Description

null

Solution(javascript)

/**
 * @param {string} s
 * @param {number[][]} shift
 * @return {string}
 */
var stringShift = function(s, shift) {
    const aux = (s,direction, count) => {
        if(direction === 1) {
            const pivot = s.length - count
            const right = s.slice(pivot)
            const left = s.slice(0, pivot)
            return right + left
        }
        const pivot = count
        const left = s.slice(0, pivot)
        const right = s.slice(pivot)
        return right + left
    }

    const count = shift.reduce((acc, [direction, count]) => direction === 0 ? acc - count : acc + count, 0)
    
    return aux(s, count < 0 ? 0 : 1, Math.abs(count) % s.length)
};