Unicode值\uXXXX到Javascript中的字符 [英] Unicode value \uXXXX to Character in Javascript

问题描述

我从来没有这样做，我不知道为什么它输出臭名昭着的 编码字符。任何想法如何输出字符，因为他们应该（ASCII + Unicode）？我认为 \\\A - \\\Z 应打印 AZ

  var c = new Array（F E，D，C，B，A，9,8,7,6,5,4,3,2,1,0） 
 var n = 0; 
 var d =; 
 var o =; 
 
 for（var i = 16; i  - ;）{
 for（var j = 16; j-;）{
 for（var k = 16; k - ;）{
 for（var l = 16; l  - ;）{
 
d = c [i] .toString（）
 + c [j] .toString （）
 + c [k] .toString（）
 + c [l] .toString（）; 
 
o + =（++ n +：
 + d +=
 + String.fromCharCode（\\u+ d）
 +\\\
< br />）; 
 
 if（n> = 500）{i = j = k = l = 0;} // stop early 
} 
} 
} 
 } 
 
 document.write（o）; 
   
 
解决方案
  .fromCharCode 函数接受一个数字，而不是字符串。你不能把一个这样的字符串放在一起，期望解析器做你认为它会做; 
 
 
 
您可以改写您的代码，以从十六进制数字中创建一个字符串（不带\u），然后调用
  var n = parseInt（hexString，16）; 
  
获取值。然后您可以使用 值调用 .fromCharCode（）。
 
I've never done this before and am not sure why it's outputting the infamous � encoding character.  Any ideas on how to output characters as they should (ASCII+Unicode)?  I think \u0041-\u005A should print A-Z in UTF-8, which Firefox is reporting is the page encoding.
   var c   = new Array("F","E","D","C","B","A",9,8,7,6,5,4,3,2,1,0);
   var n   = 0;
   var d   = "";
   var o   = "";

   for (var i=16;i--;){
      for (var j=16;j--;){
         for (var k=16;k--;){
            for (var l=16;l--;){

               d =  c[i].toString()
                 +  c[j].toString()
                 +  c[k].toString()
                 +  c[l].toString();

               o += ( ++n + ": " 
                    + d   + " = " 
                    + String.fromCharCode("\\u" + d) 
                    + "\n<br />" );

               if(n>=500){i=j=k=l=0;} // stop early
            }
         }
      }
   }

   document.write(o);

解决方案
The .fromCharCode() function takes a number, not a string.  You can't put together a string like that and expect the parser to do what you think it'll do; that's just not the way the language works.

You could ammend your code to make a string (without the '\u') from your hex number, and call
var n = parseInt(hexString, 16);
to get the value. Then you could call .fromCharCode() with that value.

                        
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