题解 | #统计大写字母个数#

测试

const reg = /([A-Z])/g;
'add123#$%#%#O'.match(reg); //['O']
'150175017(&^%&$vabovbao'.match(reg); //null

代码

const reg = /([A-Z])/g;
while(line = readline()){
    const groups = line.match(reg);
    if(groups) {
        console.info(groups.length);
    } else {
        console.info(0);
    }
}