复制代码 代码如下:
function zipnum(num, radix){
    if(!zipnum.zip){
        zipnum.zip = function(inputnum){
            if(inputnum > 35){//用大写字母表示36-61
                return string.fromcharcode('a'.charcodeat(0) + inputnum % 36);
            } else if(inputnum > 9){//用小写字母表示10-35
                return string.fromcharcode('a'.charcodeat(0) + inputnum % 10);
            } else {
                return inputnum;
            }
        }
    }
    var quotient = num, remainder, result;
    if(radix > 36 && radix         result = [];
        do {
            remainder = quotient % radix;
            quotient = parseint(quotient / radix);
            result.push(zipnum.zip(remainder));
        }while(quotient > radix);
        remainder = quotient % radix;
        if(remainder !== 0){
            result.push(zipnum.zip(remainder));
        }
        result = result.reverse().join('');
    } else if(radix > 1 && radix         result = num.tostring(radix);
    } else {
        result = num;
        window.console && console.warn('radix argument must be between 2 and 62')
    }
    return result;
}
function testsortnum(){
    assertequals(zipnum(61, 62), 'z');
    assertequals(zipnum(62 * 2 - 1, 62), '1z');
    assertequals(zipnum(62 * 3 - 1, 62), '2z');
    assertequals(zipnum(1361182624991, 62), 'dxn5fjb');
}
testsortnum();