Understanding and Implementing Schemas in Python

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Understanding and Implementing Schemas in Python Introduction In the world of programming, particularly in the context of data management and validation, schemas play a vital role. A schema is essentially a blueprint or a predefined structure that defines the expected format, data types, and constraints for a given data entity. In this blog, we will delve into the concept of schemas in Python, exploring what they are, why they are important, and how you can implement them in your projects. What is a Schema? A schema serves as a contract between different components of a system, ensuring that data is consistent, valid, and well-structured. It defines the rules for how data should be organized, what fields it should contain, and what types of values those fields can hold. In essence, a schema acts as a set of rules that data must adhere to in order to be considered valid. Why Are Schemas Important? Data Validation: Schemas provide a way to validate incoming data. When data is received o...
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Auto Increment, Decrement, Reset and Pause counter in React Js | Interview Question

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Auto Increment, Decrement, Reset & Pause counter in React Js | Interview Question

In this post, I am going to cover one interview question & following is the functionality of the application. I hope you may have come across such situation especially in react interview.

counter
Counter in React Js

There are four functionality covered in the application:

A) Increment

B) Decrement

C) Reset

D) Pause

Sample Code:

A) App.js

import React, { useState, useEffect } from 'react';
import './style.css';
export default function App() {
  const [count, setCount] = useState(0);
  const [action, setAction] = useState(false);
  const [operation, setOperation] = useState('');

  useEffect(() => {
    if (action) {
      const timeOunt = setTimeout(() => {
        operation == 'INC' ? setCount(count + 1) : setCount(count - 1);
      }, 1500);
      return () => {
        clearTimeout(timeOunt);
      };
    }
  }, [count]);

  return (
    <div id="mainDiv">
      <div id="label">
        <label>{count}</label>
      </div>
      <div id="btnGroup">
        <button
          id="inc"
          type="submit"
          onClick={() => {
            setOperation('INC');
            setCount(count + 1);
            setAction(true);
          }}
        >
          Increment
        </button>
        <button
          id="dec"
          type="submit"
          onClick={() => {
            setOperation('DEC');
            setCount(count - 1);
            setAction(true);
          }}
        >
          Decrement
        </button>
        <button
          id="reset"
          type="submit"
          onClick={() => {
            setAction(false);
            setCount(0);
          }}
        >
          Reset
        </button>
        <button
          id="pause"
          type="submit"
          onClick={() => {
            setAction(false);
          }}
        >
          Pause
        </button>
      </div>
    </div>
  );
}

CSS:

B) style.css

#mainDiv{
  width: 350px;
  height: 50px;
  border: 1px solid black;
  padding: 20px;
  background-color: orange;
}
#label{
  text-align: center;
  margin: 2px;
}
#inc, #dec, #reset, #pause{
 float: left;
 margin: 8px;
 border-radius:20px;
}


Happy Learning!! Happy Coding!!



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