为什么要单独写个方法去做不同进制之间的转换呢？因为自带的方法在进行十六进制转为二进制的时候，精度在13位字符后就会出现丢失，为了让精度不丢失就自己根据16进制转换2进制的原理写了两个方法

    如果长度没有超过13位，可以用parseInt("125adf8",16).toString(2)='1001001011010110111111000',

   十六进制转换二进制  (本次转换的方法没有考虑带小数点的情况)

function hex_to_bin(str) {let hex_array = [{key:0,val:"0000"},{key:1,val:"0001"},{key:2,val:"0010"},{key:3,val:"0011"},{key:4,val:"0100"},{key:5,val:"0101"},{key:6,val:"0110"},{key:7,val:"0111"},{key:8,val:"1000"},{key:9,val:"1001"},{key:'a',val:"1010"},{key:'b',val:"1011"},{key:'c',val:"1100"},{key:'d',val:"1101"},{key:'e',val:"1110"},{key:'f',val:"1111"}]let value=""for(let i=0;i<str.length;i++){for(let j=0;j<hex_array.length;j++){if(str.charAt(i).toLowerCase()== hex_array[j].key){value = value.concat(hex_array[j].val)break}}}console.log(value)return value}

二进制转十六进制    (本次转换的方法没有考虑带小数点的情况)

function bin_to_hex(str) {let hex_array = [{key:0,val:"0000"},{key:1,val:"0001"},{key:2,val:"0010"},{key:3,val:"0011"},{key:4,val:"0100"},{key:5,val:"0101"},{key:6,val:"0110"},{key:7,val:"0111"},{key:8,val:"1000"},{key:9,val:"1001"},{key:'a',val:"1010"},{key:'b',val:"1011"},{key:'c',val:"1100"},{key:'d',val:"1101"},{key:'e',val:"1110"},{key:'f',val:"1111"}]let value = ''let list=[]console.log(str)if(str.length%4!==0){let a = "0000"let b=a.substring(0,4-str.length%4)str = b.concat(str)}console.log(str)while (str.length > 4) {list.push(str.substring(0, 4))str = str.substring(4);}list.push(str)console.log(list)for(let i=0;i<list.length;i++){for(let j=0;j<hex_array.length;j++){if(list[i]==hex_array[j].val){value = value.concat(hex_array[j].key)break}}}console.log(value)return value}

异或运算 （需要上面两个方法做基础）

function xor(a ,b){let A = hex_to_bin(a)let B = hex_to_bin(b)console.log(a+"   a的二进制:"+A)console.log(b+"   b的二进制:"+B)let o = "00000000000000000000000000000000000"if(A.toString().length > B.toString().length){let c = A.toString().length - B.toString().lengthB = o.substr(0,c).concat(B)}else if(A.toString().length < B.toString().length){let c = B.toString().length - A.toString().lengthA = o.substr(0,c).concat(A)}console.log('B:'+B)console.log('A:'+A)let d = ""for(let i=0;i<A.toString().length;i++){if(A.toString()[i]==B.toString()[i]){let q="0"d = d.concat(q)}else{let p="1"d = d.concat(p)}}console.log(bin_to_hex(d))return bin_to_hex(d)}

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