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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                ![](https://img.kancloud.cn/48/2c/482c6362fb45965e8fe977d8a95a1b7f_1138x102.png) ~~~ ~ function () { // function myIndexOf(T) { // let lenT = T.length, // lenS = this.length, // res=-1; // if(lenT > lenS) return -1; // for (let i = 0; i < lenS - lenT; i++) { // let char = this[i]; // if(this.substr(i,lenT) === T){ // res = i; // break; // } // } // return res; // } function myIndexOf(T) { let reg = new RegExp(T), res = reg.exec(this); return res ===null ? -1 : res.index; } String.prototype.myIndexOf= myIndexOf; }(); let S = "zhufengpeixun"; T = "pei"; console.log(S.myIndexOf(T)); ~~~
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                              哎呀哎呀视频在线观看