Greasemonkey script to block Game of Thrones spoilers

Background

Greasemonkey is a Firefox plugin that runs user scripts just like tampermonkey in chrome. In this post we will see a simple script that will blacklist certain words appearing in Game of thrones which will potentially be spoilers.

Greasemonkey script to block Game of Thrones spoilers

Script is as follows -

// ==UserScript==
// @name           Spoiler Killer
// @include        http://*.facebook.com/*
// @include        https://*.facebook.com/*
// @require        http://code.jquery.com/jquery-1.7.1.min.js
// @require        https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant          none
// @version 1
// @namespace http://opensourceforgeeks.blogspot.in/
// @description Blacken facebook posts possibly containing Game of Thrones spoilers.
// copied from https://gist.github.com/vshivam/94d18c5d652217a449a5b785cbda1073
// ==/UserScript==

(function(){
    var terms = ['spoiler', 'game of thrones', 'hodor', 'jon snow', 'khaleesi', 'stark', 'dothraki'];
    function actionFunction(node){
        var content = node.html();
        content = content.toLowerCase();
        $.each(terms, function(index, term){
            if(content.indexOf(term) > -1){
                var overlay = $('<div />' ).css({
                     position: "absolute",
                     width: "100%",
                     height: "100%",
                     left: 0,
                     top: 0,
                     zIndex: 1000000,
                     background: "#000000",
                 });
                (function(overlay, node){
                    overlay.appendTo(node.css("position", "relative"));
                    $(node).on("mouseenter", function(){
                        overlay.hide();
                    });
                    $(node).on("mouseleave", function(){
                        overlay.show();
                    });
                })(overlay, node);
            }
        });
    }
    waitForKeyElements("div.userContentWrapper", actionFunction);
})();

NOTE : This script is copied over from https://gist.github.com/vshivam/94d18c5d652217a449a5b785cbda1073.  It's original version can be found at https://gist.github.com/vshivam/9080a0b5ece35689163ed12955c131a9 (simply replaces text)

Script essentially blackens the posts that contain spoiler words. Feel free to add/remove words as you choose suitable. Make sure that the script is running on the site you intend it to be. You can test that from  Greasemonkey icon near URL bar. See following screenshot for details -

Related Links

• https://gist.github.com/aniket91/bb60c2c11ed904d1ac997238af32deec

Pushing existing local project to Github

Background

We have seen before how to clone a remote repository to local, work on it, modify files, commit and push to remote repository. But most of the time what happens we have a project on local (a new one) and want to save it on github. In this post we will see how to do that.

Pushing existing local project to Github

You will need to initialize a new repository on Github first. Simple create an empty repository.

Now to add your local repo you can execute following commands -

1. mkdir MyTestRepo
2. cd MyTestRepo/
3. touch test.txt
4. git init
5. git add .
6. git commit -m "First commit"
7. git remote add origin https://github.com/aniket91/MyTestRepo.git
8. git push -f origin master

Output is as follows -

You can then see this commit on remote.

After creating a new repo on github you will see following options -

Related Links

• Installing Git in Ubuntu(OSFG)
• Install and use Git on Windows(OSFG)
• Installing Git on CentOS from sources(OSFG) 
• Checking for existing SSH keys
• Generating a new SSH key and adding it to the ssh-agent
• Adding a new SSH key to your GitHub account

Installing Git in Ubuntu

Background

Sometime back I had written a post about git (it's installation and usage in windows). This post simple covers it's Linux counterpart. How to install git in Ubuntu.

•  Install and use Git on Windows

 Installing git on Ubuntu

To install git execute following command -

• git apt-get install git-core

 Post installation you can run following command to verify installation -

•  git --version

 And you are all good to go!

To set up git config you can use following command -

•  git config --global user.name "aniket91"
•  git config --global user.email "you@example.com"

To view the config  you can do

•  git config --list

or view the config file

•  cat ~/.gitconfig

Try cloning a repository

• git clone https://github.com/aniket91/DataStructures.git

My Git Repositories

• TicTacToe
• Data Structure

Avoid Merge Commits

Whenever you have unpushed commits on your local and you try to do a git pull after those commits it will create a merge commit .
To avoid it follow one of the below mentioned methods,

1. run git pull --rebase 
2. To avoid running it with the rebase flag and to make the above the default behavior when pulling changes, git config --global branch.autosetuprebase always 
3. In SourceTree under tools->options/preferences under the Git tab select "Use rebase instead of merge by default for tracked branches"

Related Links

•  Install and use Git on Windows(OSFG)
•  Installing Git on CentOS from sources(OSFG)
• Checking for existing SSH keys
• Generating a new SSH key and adding it to the ssh-agent
• Adding a new SSH key to your GitHub account
•  

Installing Oracle Java 8 In Ubuntu Or Linux Mint Via PPA Repository [JDK8]

Background

I have written a couple of posts on new features in Java 8 (See Related Links section at the bottom of this page). 

In this post we will see how to install and configure Java 8 on Ubuntu. Current Java version that is set on my machine in Java7.

Installing Java 8

To install Java run the following commands -

• sudo add-apt-repository ppa:webupd8team/java
• sudo apt-get update
• sudo apt-get install oracle-java8-installer

Once you have run above commands you can verify the installation by running following command

• java -version

Webupd8 ppa repository also provides package to set environment variables. Run following command for it

• sudo apt-get install oracle-java8-set-default

NOTE  :  If you've already installed oracle-java6-set-default or oracle-java7-set-default, they will be automatically removed when installing oracle-java8-set-default (and the environment variables will be set for Oracle Java 8 instead).

Related Links

• Adding Java 8 support to Eclipse kepler 
• Understanding Default methods in Java 8
• Using Lambda Expressions from Java 8
• Things to do after installing Ubuntu 14.04 LTS

Stariway to Kth floor problem

Question

There are N stairs that you need to take to the kth floor. You can either climb 1 stair at a time or 2 stair at a time. In how many ways you can cover N stairs.

Solution

Solution is simple recursive one. At a particular step 

• If remaining step >=2 then you can either climb 1 step or 2 steps
• Else If remaining step == 1 you dont have a choice, have to climb 1 step
• Else you have reached your destination and have crossed n stairs - increment way

Java solution is as follows - 

    public static int findWays(int stairsClimbed, int totalStairs) {
        
        if(stairsClimbed == totalStairs) {
            return 1;
        }
        
        if((totalStairs - stairsClimbed) >= 2) {
            return findWays(stairsClimbed + 2, totalStairs) + findWays(stairsClimbed + 1, totalStairs);
        }
        else if ((totalStairs - stairsClimbed) == 1) {
            return findWays(stairsClimbed + 1, totalStairs);
        }
        return 0;
    }

You can find detailed Java solution with test cases on git repository - StairwayClimbWaysFinder .

PS : Git link has a bonus solution as well :)

Related Links

• StairwayClimbWaysFinder GIT