# 最长公共前缀

/**
 * @param {string[]} strs
 * @return {string}
 */
var longestCommonPrefix = function(strs) {
    if(!strs.length) return '';
    let res = '', variable;
    strs.map((element, index, array) => {
        if(index === 0){
            variable = element;
        }else{
            let len = variable.length < element.length ? variable.length : element.length;
            for(let i = 0; i < len; i++){
                if(variable.charAt(i) === element.charAt(i)){
                    res = res + variable.charAt(i);
                }else{
                    break;
                }
            }
            variable = res;
            res = '';
        }
    });
    return variable;
};