Pro*_*orT 2 javascript unicode encoding character-encoding octal
我正在尝试使用 Javascript 将一系列八进制字节转换为文本,如下所示:
\n\n输入是 \\330\\265 输出应该是 \xd8\xb5
\n\n以下工具成功地做到了这一点:
\n\n\n\n我正在尝试复制这个逻辑
\n这是一个非常简单的任务,您所需要做的就是使用该Number.toString(radix)方法转换您从中返回的十进制整数值String.charCodeAt(index)以对字符串进行编码。
String.fromCharCode(charCode)使用和的组合parseInt(numberString, radix),您可以使用值 8 作为基数并将其传递给该fromCharCode方法来解码八进制值。
Input: Hello World
Encode: 110 145 154 154 157 040 127 157 162 154 144
Decode: Hello World
Run Code Online (Sandbox Code Playgroud)
Input: Hello World
Encode: 110 145 154 154 157 040 127 157 162 154 144
Decode: Hello World
Run Code Online (Sandbox Code Playgroud)
const
bytesToChars = (bytes) => bytes.map(byte => String.fromCharCode(parseInt(byte, 10))),
charsToBytes = (chars) => chars.map(char => char.charCodeAt(0)),
decToOctBytes = (decBytes) => decBytes.map(dec => dec.toString(8).padStart(3, '0')),
octToDecBytes = (octBytes) => octBytes.map(oct => parseInt(oct, 8)),
encode = (str) => decToOctBytes(charsToBytes(str.split(''))).join(' '),
decode = (octBytes) => bytesToChars(octToDecBytes(octBytes.split(/\s/))).join('');
let octBytes, str;
console.log('Input: ', str = 'Hello World');
console.log('Encode:', octBytes = encode(str));
console.log('Decode:', decode(octBytes));Run Code Online (Sandbox Code Playgroud)
.as-console-wrapper { top: 0; max-height: 100% !important; }Run Code Online (Sandbox Code Playgroud)
/* Redirect console output to HTML. */ document.body.innerHTML = '';
console.log=function(){document.body.innerHTML+=[].slice.apply(arguments).join(' ')+'\n';};
var octBytes, str;
console.log('Input: ', str = "Hello World");
console.log('Encode:', octBytes = encode(str));
console.log('Decode:', decode(octBytes));
function encode(str) {
return decToOctBytes(charsToBytes(str.split(''))).join(' ');
}
function decode(octBytes) {
return bytesToChars(octToDecBytes(octBytes.split(' '))).join('');
}
function charsToBytes(chars) {
return chars.map(function(char) {
return char.charCodeAt(0);
});
}
function bytesToChars(bytes) {
return bytes.map(function(byte) {
return String.fromCharCode(parseInt(byte, 10));
});
}
function decToOctBytes(decBytes) {
return decBytes.map(function(dec) {
return ('000' + dec.toString(8)).substr(-3);
});
}
function octToDecBytes(octBytes) {
return octBytes.map(function(oct) {
return parseInt(oct, 8);
});
}Run Code Online (Sandbox Code Playgroud)