Can someone tell me what's wrong with this javascript?

Question

I am trying something experimental here, please answer, what's wrong in this code?

function run(){
 for(var i=0;i<arguments.length;i++){
  var type=arguments[i].split(" ")[0];
   if(type=="(write)"){
    var arr=arguments[i].split(" ");
    var str=[];
    for(var i=1;i<arr.length;i++){
     str.push(arr[i]);
    }
    var fin="\n"+str.join(" ");
    document.getElementById("console").textContent+=fin;
   }
  }
 }
run(
 "(write) I wonder if this works.",
 "(write) I think it DOES!"
);

Somehow it only puts "I wonder if this works." in the div but no "I think it DOES!". Can someone tell me what's wrong and return the corrected script?

Answer 1

JavaScript没有代码块范围..将其他变量更改为其他内容

Answer 2

You are using i variable of for loop twice. Javascript has functional scope and block scope. So use different variable in second "for" (may be aj);

for(var j=1;j<arr.length;j++){
     str.push(arr[j]);
    }

Answer 3

function run(){


  for(var i=0;i<arguments.length;i++){


    var type=arguments[i].split(" ")[0];
    if(type=="(write)"){
      var arr=arguments[i].split(" ");

      var str=[];

      //here your i was increamented twice so loop excuted only once
      for(var j=1;j<arr.length;j++){
       str.push(arr[j]);
     }


     var fin="\n"+str.join(" ");
     console.log(fin);
     document.getElementById("console").textContent+=fin;
   }
 }
}
run(
 "(write) I wonder if this works.",
 "(write) I think it DOES!"
 );

Answer 4

Change i in loop in:

for (var i = 1; i < arr.length; i++){
    str.push(arr[i]);
}

by something else or use let in es6 to define i.