[英]Convert integer array to string at javascript
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
输出为:
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: ä¸æchinese
输出为:
ä¸æchinese
So how should I process the array at javascript?那么我应该如何在javascript中处理数组呢?
JavaScript strings consist of UTF-16 code units, yet the numbers in your array are the bytes of a UTF-8 string. 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。 Here is one way to convert the string, which uses the decodeURIComponent() function:
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。
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]
Another solution without decodeURIComponent
for characters up to 3 bytes (U+FFFF).另一个没有
decodeURIComponent
解决方案,用于最多 3 个字节 (U+FFFF) 的字符。 The function presumes the string is valid UTF-8, not much error checking...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
}
Seems the best way these days is the following:这些天似乎最好的方法如下:
function bufferToString(arr){
return arr.map(function(i){return String.fromCharCode(i)}).join("")
}
Chinese charset has a different encoding in which one char is more than one byte long.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。 When you do this
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.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。 What you need to do is, pack the bytes together.
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 this for packing bytes to a string.您还可以查看this将字节打包为字符串。
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