MixMAx123, I was looking for a way to search a given R value within the transaction scripts. For example, I want to find all transactions where R value equals 000000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6. The output would be all the TX hashes which contain this R value. I was not able to find anything like this online. Not really finding a blockchain parser that does this either 
Lol. Did you even read my answer or what ? bitcoin-iterate can do exactly what you are looking for. Just check the README.Quote
Ok, I'm going to write you a parser like this.
There are already a lot of them, if it's not for learning purpose I'm not sure it's worse reinventing the wheel.