Javascript 使用for循环查找另一个字符串中的一个字符串

我不明白为什么我的循环无法在

textToSearch

中找到所有出现的

myName

。如果它靠近

textToSearch

的开头，则只能找到一个匹配项

var textToSearch = "Aaron blue red Aaron green Aaron yellow Aaron";
var myName = "Aaron";
var hits = [];
for(i = 0; i < textToSearch.length; i++){
   if(textToSearch.substring(i, myName.length) === myName){ 
     hits.push(textToSearch.substring(i, myName.length));
   }
}
if(hits.length === 0){
   console.log("Your name wasn't found!");
} else {
   console.log("Your name was found " + hits.length + " times.");
   console.log(hits);
}

var textToSearch=“亚伦蓝红亚伦绿亚伦黄亚伦”；
var myName=“亚伦”；
var命中率=[]；
对于（i=0；i

您需要将

i

子字符串设置为

i+myName.length

var textToSearch=“亚伦蓝红亚伦绿亚伦黄亚伦”；
var myName=“亚伦”；
var命中率=[]；
for（var i=0；i}

您需要将

i

子字符串设置为

i+myName.length

var textToSearch=“亚伦蓝红亚伦绿亚伦黄亚伦”；
var myName=“亚伦”；
var命中率=[]；
for（var i=0；i}

另一种解决方案是使用

indexOf

。它将偏移量作为第二个参数

var textToSearch = "Aaron blue red Aaron green Aaron yellow Aaron";
var myName = "Aaron";
var hits = 0;
var lastIndex = 0;

while(lastIndex != -1){
   lastIndex = textToSearch.indexOf(myName, lastIndex);
   if (lastIndex != -1) {
     hits++;
     lastIndex++;
   } // Search at the next index
}

if(hits === 0){
   console.log("Your name wasn't found!");
} else {
   console.log("Your name was found " + hits + " times.");
}

---

另一种解决方案是使用

indexOf

。它将偏移量作为第二个参数

var textToSearch = "Aaron blue red Aaron green Aaron yellow Aaron";
var myName = "Aaron";
var hits = 0;
var lastIndex = 0;

while(lastIndex != -1){
   lastIndex = textToSearch.indexOf(myName, lastIndex);
   if (lastIndex != -1) {
     hits++;
     lastIndex++;
   } // Search at the next index
}

if(hits === 0){
   console.log("Your name wasn't found!");
} else {
   console.log("Your name was found " + hits + " times.");
}