var Str="hello world";
var result=Str.filter('e');
console.log(result);
String.prototype.filter=function(){
if(arguments.length<1) throw new Error('缺少参数');
var a = [], _this = this;
for( var i =0; i < arguments.length; i++){
a.push(arguments[i]);
}
var i = -1;
a.forEach(function(key,m,n){
if(i != -1) return true; //这应该是个排错语句
i = _this.indexOf(key) //检索字符串在字符串中首次出现的位置,第二个参数表示开始检索的位置。方法.若没有检索到。则返回-1.
console.log(m);
console.log(n);
});
if(i == -1){
return false;
}
else{
return i;
}
}
/* var Str="hello world";
var result=Str.filter('e');
console.log(result);
*/
node js 方式运行报错
SyntaxError: Unexpected end of input
at wrapSafe (internal/modules/cjs/loader.js:979:16)
at Module._compile (internal/modules/cjs/loader.js:1027:27)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
at internal/main/run_main_module.js:17:47
自己看了好久没看出来问题在哪里,请教大佬们