Defining language | Kleene closure | String | Sigma | Alphabet set | Easy Learning Classroom
* Rules defined explicitly and clearly
* No ambiguities
* Universally uniform understanding
* Lets the machine
- Interpret an input uniformly every time. i.e. always produces the same output for a particular input
- Explicitly reject invalid input
* Define alphabet set
* Define rules for forming valid words and sequences of words from Sigma
Called grammar, Can be descriptive , Can be mathematical, Can also define supporting functions e.g., length(X), reverse(x)
Strings: A string a finite sequence of symbols chosen from the alphabet.
For example: 0111100 , 123045, abbbcdeg etc.
* Set closure
* Kleene Closure (applied to )
- A set of all the strings (finite) that can be formed by the elements of where the elements may be repeated any number of times.
- Denoted by Sigma/∑*
- Also called Kleene star.
Sigma/∑* : The set of all strings over an alphabet ∑ and called Kleene Star Closure of alphabet. So we have
Sigma/∑* = ∑0 U ∑1 U ∑2 U ∑3 U……………
Sigma/∑+ : The set of all strings over an alphabet ∑ excluding empty string, ε, and called plus operation. So we have
Sigma/∑+ = ∑1 U ∑2 U ∑3 U……………
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Operating Systems playlist -
https://www.youtube.com/playlist?list=PLhmA3HN6Mpp3FqSuSNbvxErqHFBbpfinS- Best from Operating Systems:
Process Creation | System Calls | Mode & Context Switching | Overhead | Easy Learning Classroom -
https://youtu.be/1T_gmh-AkfYVmware and Redhat | Downloading + Installation | Complete video tutorial | Easy Learning Classroom -
https://youtu.be/jyuKdDKmgMgCommands in Linux Operating Systems | ls cmd | pwd cmd | touch cmd | Easy Learning Classroom -
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C++ tutorials playlist -
https://www.youtube.com/playlist?list=PLhmA3HN6Mpp1Ab_MqrMljkkFVSz68-gzv- Best from C++ Playlist
Different star patterns using for loop in C++ | Triangle Shapes | Coding | Easy Learning Classroom –
https://youtu.be/TzzAVzRWq_kPalindrome Number Program in C++ (HINDI/URDU) | Coding | Easy Learning Classroom -
https://youtu.be/6lvZNVxi9goLecture 7 - Character Arrays in C++ | Part 4(a) | Easy Learning Classroom -
https://youtu.be/0dg2Rp8OO-IDifference Between For, While, Do-while loop in C++ (Hindi/Urdu) | Easy Learning Classroom -
https://youtu.be/TjQkwZk50DUInline Functions in C++ (HINDI/URDU) | Easy Learning Classroom -
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About the Site 🌐
This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥
Origins of the Idea 🌱
The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠
Challenges Faced 🤔
Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.
Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍
Creating Truly Random Links 🛠️
The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.
About YouTube 📺
YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟
Content and Users 🎵
Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.
While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.
Monetization and Impact 🤑
YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.
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