Filters links out of Stack Overflow's "Hot Network Questions" sidebar

network_bar_filter.user.js

// ==UserScript==
// @name Network Bar Filter
// @namespace about:blank
// @include http://stackoverflow.com/*
// @include https://stackoverflow.com/*
// @include *.stackexchange.com/*
// @version 3
// @grant none
// ==/UserScript==

//returns true if item is in seq.
//(is there a built-in way to do this? I can't be bothered to check)
function contains(seq, item){
    for(var i = 0; i < seq.length; i+=1){
        if (seq[i] == item){return true;}
    }
    return false;
}

//returns true if the link didn't originate from a blacklisted site.
function is_good(list_item){
    var blacklist = [
        "Science Fiction & Fantasy Stack Exchange",
        "Movies & TV Stack Exchange"
    ];
    var title = list_item.getElementsByClassName("favicon")[0].title;    
    return !contains(blacklist, title);
}

/*filters all links out of the network bar, where func(link) is false.*/
function filter_network_bar(func){
    var bar = document.getElementById("hot-network-questions");
    var ul = bar.getElementsByTagName("ul")[0];
    console.log(ul.children.length);
    for (var i = 0; i < ul.children.length; i+=1){
        var li = ul.children[i];
        //console.log(li.getElementsByClassName("favicon")[0].title);
        if (!func(li)){
            var text_element = li.getElementsByTagName("A")[0];
            text_element.title = text_element.innerHTML.trim();
            text_element.innerHTML = "[Hover for potential spoilers]";
        }
    }    
}

filter_network_bar(is_good);