javascript 在javascript中将整数数组转换为字符串
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Convert integer array to string at javascript
提问by solomon_wzs
Here is php code:
这是php代码：
$arr=array(228,184,173,230,150,135,99,104,105,110,101,115,101);
$str='';
foreach ($arr as $i){
$str.=chr($i);
}
print $str;
the output is: 中文chinese
输出是： 中文chinese
Here is javascript code:
这是javascript代码：
var arr=[228,184,173,230,150,135,99,104,105,110,101,115,101];
var str='';
for (i in arr){
str+=String.fromCharCode(arr[i]);
}
console.log(str);
the output is: ??-?chinese
输出是： ??-?chinese
So how should I process the array at javascript?
那么我应该如何在javascript中处理数组呢？
回答by PleaseStand
JavaScript strings consist of UTF-16code units, yet the numbers in your array are the bytes of a UTF-8string. Here is one way to convert the string, which uses the decodeURIComponent()function:
JavaScript 字符串由UTF-16代码单元组成，但数组中的数字是UTF-8字符串的字节。这是转换字符串的一种方法，它使用decodeURIComponent()函数：
var i, str = '';
for (i = 0; i < arr.length; i++) {
str += '%' + ('0' + arr[i].toString(16)).slice(-2);
}
str = decodeURIComponent(str);
Performing the UTF-8 to UTF-16 conversion in the conventional way is likely to be more efficient but would require more code.
以传统方式执行 UTF-8 到 UTF-16 转换可能更有效，但需要更多代码。
回答by ingrid
var arry = [3,5,7,9];
console.log(arry.map(String))
the result will be ['3','5','7','9']
结果将是 ['3','5','7','9']
var arry = ['3','5','7','9']
console.log(arry.map(Number))
the result will be [3,5,7,9]
结果将是 [3,5,7,9]
回答by smrtl
Another solution without decodeURIComponentfor characters up to 3 bytes (U+FFFF).
The function presumes the string is valid UTF-8, not much error checking...
另一种不decodeURIComponent包含最多 3 个字节 (U+FFFF) 的字符的解决方案。该函数假定字符串是有效的 UTF-8，没有太多的错误检查......
function atos(arr) {
for (var i=0, l=arr.length, s='', c; c = arr[i++];)
s += String.fromCharCode(
c > 0xdf && c < 0xf0 && i < l-1
? (c & 0xf) << 12 | (arr[i++] & 0x3f) << 6 | arr[i++] & 0x3f
: c > 0x7f && i < l
? (c & 0x1f) << 6 | arr[i++] & 0x3f
: c
);
return s
}
回答by Amit Khanna
Chinese charset has a different encoding in which one char is more than one byte long. When you do this
中文字符集有一种不同的编码，其中一个字符的长度超过一个字节。当你这样做时
for (i in arr){
str+=String.fromCharCode(arr[i]);
}
You are converting each byte to a char(actually string) and adding it to a string str. What you need to do is, pack the bytes together.
您正在将每个字节转换为字符（实际上是字符串）并将其添加到字符串 str 中。您需要做的是，将字节打包在一起。
I changed your array to this and it worked for me:
我把你的数组改成了这个，它对我有用：
var arr=[20013,25991,99,104,105,110,101,115,101];
I got these codes from here.
我从这里得到这些代码。
you can also take a look at thisfor packing bytes to a string.
您还可以查看this将字节打包为字符串。
回答by Sancarn
Seems the best way these days is the following:
这些天似乎最好的方法如下：
function bufferToString(arr){
arr.map(function(i){return String.fromCharCode(i)}).join("")
}
