utils.js
function hashCode(str) {
    var hash = 0xdeadbeef;
    for (var i = str.length; i >= 0; --i) {
        hash = (hash * 33) ^ str.charCodeAt(--i);
    }
    // turn to unsigned 32bit int
    return hash >>> 0;
}
function hashCode(str) {
    var hash = 0xdeadbeef;
    for (var i = str.length; i >= 0; --i) {
        hash = (hash * 33) ^ str.charCodeAt(--i);
    }
    // turn to unsigned 32bit int
    return hash >>> 0;
}
function hashCode ( str ) { var hash = 0xdeadbeef ; for ( var i = str . length ; i >= 0 ; -- i ) { hash = ( hash * 33 ) ^ str . charCodeAt ( -- i ) ; } // turn to unsigned 32bit int return hash >>> 0 ; }
get a non-crypto hash code from a string.

@param {string} str
@returns {number} unsigned 32bit hash code
@see http://www.cse.yorku.ca/~oz/hash.html
get a non - crypto hash code from a string .