web前端|js教程
JavaScript,转换,二进制编码,ASCII码
web前端-js教程
本文实例讲述了JavaScript转换二进制编码为ASCII码的方法。分享给大家供大家参考。具体如下：
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var input_id = "bin_text";var answer_id = "answer";function convertToASCII() { var bin_text = document.getElementById(input_id); var answer = document.getElementById(answer_id); if (!answer) { alert("Error: No element with id \""+answer_id+"\"."); return; } if (bin_text) var text = bin_text.value; else { error("No element with id \""+input_id+"\"."); return; } var divisible = text.length % 8; var nonBinary = /[^0|1]/.test(text); if (text.length > 0 && divisible == 0 && !nonBinary) { var regex = /[0|1]{8}/g; var str = text.match(regex); var code = 0; var placeVal, exp, digit; var ascii = \; while (str.length > 0) { code = 0; for (var i=0; i<str[0].length; i++) { placeVal = 7-i; exp = Math.pow(2, i); digit = str[0].charAt(placeVal); code += exp*digit; } str.shift(); ascii += String.fromCharCode(code); } answer.innerHTML = "
" + ascii + "
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"; } else { error("Malformed binary."); return; } function error(errText) { answer.innerHTML = "Error: " + errText + ""; }}.block { width: 45%; border: 1px solid #000000; padding: 10px;}.binary { background-color: #C6FFC7; padding: 3px;}.error { background-color: #FFC6C6; padding: 3px;}
Enter some binary to decode:
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