单词规律

const wordPattern = function(pattern, s) {
    const arr = s.split(" ")

    if (arr.length !== pattern.length) return false

    const hashMap_p = new Map()
    const hashMap_s = new Map()

    for(let i = 0; i < arr.length; i++) {
        if (!hashMap_p.has(pattern[i]) && !hashMap_s.has(arr[i])) {
            hashMap_p.set(pattern[i], i)
            hashMap_s.set(arr[i], i)
        }else if(!hashMap_p.has(pattern[i]) || !hashMap_s.has(arr[i])) {
            return false
        }else if(hashMap_p.get(pattern[i]) !== hashMap_s.get(arr[i])){
            return false
        }
    }
    
    return true
};