Running blockchain script in a one liner

Question

I know how to use this blockchain script on the server, but I don't know how to minify it into a single function (only one return), best would be one liner:

String.prototype.hashCode = function(){
    if(this.length ==0){
        return 0;
    }else{
        return parseInt(this.split('').map(function(char){
            return char.charCodeAt(0);
        }).reduce(function(current, previous){
            return previous + current;
        }))+ (this.substr(1, this.length)).hashCode();
    }
};
nonce = 0;
while(true){
    hash = (transaction + nonce).hashCode() % 1234;
    if (hash ==0){
        break;
    }
    nonce++;
}
return nonce;

Transaction is a string. I tried to replace this with hash, but since hashcode function calls itself, I don't know how to manage this loop without function. Can somebody tell me how to do this?

Answer 1

This is a direct translation of the original code

function findNonce( data ){
var buffer, i, hash, nonce = -1;
    data = '' + ( data || '' );
    do {
        hash = 0;
        nonce++;
        buffer = data + nonce;
        i = buffer.length;
        while(i--) hash += buffer.charCodeAt(i) * (i+1);
    } while ( hash % 1234 );
    return nonce;
};

And, once minified,

function findNonce(n){var e,o,r,t=-1;n=""+(n||"");do for(r=0,t++,e=n+t,o=e.length;o--;)r+=e.charCodeAt(o)*(o+1);while(r%1234);return t}

But if better performance is required this should be optimized, calculating first the hash for the input string and then doing only the calcs for each nonce value.

function findNonceFast( data ){
var preHash, noncePos, nonce = -1, code; 
    function hashCalc( s, hash, pos ){
        var i = s.length; while(i--) hash += s.charCodeAt(i) * (i+pos+1);
        return hash;
    };
    data =  '' + ( data || '' );
    preHash = hashCalc( data, 0, 0 );
    noncePos = data.length;
    do {
        nonce++;
        code = hashCalc( ''+nonce, preHash, noncePos );
    } while (code % 1234)
    return nonce;
};

Minified

function findNonceFast(n){function r(n,r,t){for(var e=n.length;e--;)r+=n.charCodeAt(e)*(e+t+1);return r}var t,e,o,a=-1;n=""+(n||""),t=r(n,0,0),e=n.length;do a++,o=r(""+a,t,e);while(o%1234);return a}