console.log(hex2int("1df")); 十进制整数转换16进制 AI检测代码解析 function int2hex(num, width) { var hex = "0123456789abcdef"; var s = ""; while (num) { s = hex.charAt(num % 16) + s; num = Math.floor(num / 16); } if (typeof width === "undefined" || width <= s....
* @param {string} hex 16进制字符串 */functionhexToSignedInt(hex){if(hex.length%2!=0){hex="0"+hex;}letnum=parseInt(hex,16);letmaxVal=Math.pow(2,(hex.length/2)*8);if(num>maxVal/2-1){//这里是判断正负,最高位为1,就代表正数num=num-maxVal;}returnnum;} ...
// boolean 12, // number 'haha', // string Symbol(), // symbol 20n, // bigint function(){}, // function {}, // object [], // object]for (let i = 0; i < arr.length; i++) { console.log(typeof arr[i])} 掌握JavaScript数据类型是...
functionhex2Int(hex =''){if(typeofhex !=='string'|| hex ==='') {returnNaN}consthexs = [...hex.toLowerCase()]letresInt =0for(leti =0; i < hexs.length; i++) {consthv = hexs[i]letnum = hv.charCodeAt() <58? +hv : ((code ...
lid64 =new HexStringToInt64StringConverter(true).convert(str); //true为有符号、false为无符号,str为十六进制字符串 4.二进制字符串与十六进制字符串相互转换: //二进制转十六进制functionbin_to_hex(str) { let hex_array=[{ key:0, val:"0000"}, { ...
Buffer.from()有多个方法实现,第一个参数可以传入ArrayBuffer | Uint8Array | string,如果是string类型,第二个参数为编码格式,例如实现编码转化 // base64 Buffer.from(str).toString('base64'); // 将str转base64编码 Buffer.from(str, 'base64').toString(); // 将base64编码转str ...
在学习泛型时,遇到了一个小问题: Integer i = 2; String s = (String) i; Integer类型转换为String类型,本来想直接用强制转换,结果报错: Exception...in thread “main” java.lang.ClassCastException: java.lan...
String Boolean Undefined null Symbol Number 数值最常见的整数类型格式则为十 进制 ,还可以设置 八进制 (零开头)、十六进制(0x开头) letintNum =// 10进制的55letnum =070// 8进制的56lethexNum =0xA//16进制的10 浮点类型则在数值汇总必须包含小数点,还可通过 科学计数法表示 ...
// 金额显示constprice = (9.99).toFixed(2);// 本地化显示constpopulation = (1e6).toLocaleString(); AI代码助手复制代码 类型安全场景:选择String()构造函数 functionsafeString(value) {returnString(value ??''); } AI代码助手复制代码 进制转换:必须使用toString(radix) ...
null true = %x74.72.75.65 ; true object = begin-object [ member *( value-separator member ) ] end-object member = string name-separator value array = begin-array [ value *( value-separator value ) ] end-array number = [ minus ] int [ frac ] [ exp ] decimal-point = %x2E ; ....