```javascriptfunction getCookie(name) { var prefix = name + "=" var start = document.cookie.indexOf(prefix) if (start == 1) { return null; } var end = documen
```javascript// 将字符串转换成ArrayBufer string2buffer(str) { let val = "" if (!str) return; let length = str.length; let index = 0; let array = while (index < length) {
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