function sum(str, a) {
var b = str.indexOf(a);
var num = 0;
while (b !== -1) {
console.log(b);
num++;
b = str.indexOf(a, b + 1)
}
return num;
}
标签:字符,indexOf,var,次数,num,str,字符串 From: https://www.cnblogs.com/bkyjmjweb/p/16732298.html
function sum(str, a) {
var b = str.indexOf(a);
var num = 0;
while (b !== -1) {
console.log(b);
num++;
b = str.indexOf(a, b + 1)
}
return num;
}
标签:字符,indexOf,var,次数,num,str,字符串 From: https://www.cnblogs.com/bkyjmjweb/p/16732298.html