HN Ignorance Is Bliss

hn_ignorance.js

// ==UserScript==
// @name                HN Ignorance Is Bliss
// @description         Hide your comment scores and karma counters. See https://news.ycombinator.com/item?id=14456203
// @author              sillysaurus3
// @version             1.0
// @match               *://news.ycombinator.com/*
// @grant               none
// @downloadURL         https://gist.githubusercontent.com/sillysaurus/4d917e925548e4c7ec6f6bb96c94ef5c/raw
// @updateURL           https://gist.githubusercontent.com/sillysaurus/4d917e925548e4c7ec6f6bb96c94ef5c/raw
// ==/UserScript==
(function() {
    var map1 = function (f, l, o) {
        o = o || {};
        var r = [];
        var more = true;
        var done = function(x) { r = x; more = false; };
        for (var k in l) {
            var i = (k.search(/^[-]?[0-9]+$/) < 0 ? null : parseInt(k));
            var x = f(l[k], {index: i, key: (i ? null : k), input: l, output: r, return: done});
            if (!more) { return r; }
            if (o.nulls || (x != null)) {
                r[k === i ? k : r.length] = x;
            }
        }
        return r;
    };
    var scramble = function (s) { return s.replace(/[0-9]/g, '9'); };
    // Hide comment scores.
    var scores = document.getElementsByClassName('score');
    for (var i = 0; i < scores.length; i++) {
        var x = scores[i];
        if (x.parentElement && x.parentElement.className === 'comhead') {
            x.innerHTML = '';
        }
    }
    // Build a table of HN properties.
    hnKeys = [];
    map1(function (x,o) {
        if (o.index !== null && x.children.length === 2) {
            var k = x.children[0].innerHTML;
            var v = x.children[1];
            hnKeys[k.length <= 0 ? hnKeys.length : k] = v;
        }
    }, document.querySelector('#hnmain tbody').lastElementChild.querySelectorAll('tr:not([class]) table tr'));
    // Get the logged-in user.
    hnUser = null;
    map1( function (n, o) {
        if (o.index && o.index > 0 && n.innerHTML === 'logout') {
            hnUser = o.input[o.index-1];
            o.return();
        }
    }, document.querySelectorAll('.pagetop a'));
    if (hnUser) {
        // Scramble the profile karma counter.
        if (hnKeys['user:'] && hnKeys['karma:'] && hnKeys['user:'].firstChild.innerHTML === hnUser.innerHTML) {
            hnKeys['karma:'].innerHTML = scramble(hnKeys['karma:'].innerHTML);
        }
        // Scramble the topbar karma counter.
        var KarmaCounter = /[(][0-9]+[)]\s+[|]/;
        map1( function (n, o) {
            if (n.nodeType === document.TEXT_NODE && n.nodeValue.search(KarmaCounter) >= 0) {
                n.nodeValue = scramble(n.nodeValue);
                o.return();
            }
        }, hnUser.parentElement.childNodes);
    }
})();