Create Array with null values in JavaScript & ReactJS – Code Example
Akash Mittal
To create an array of size n and having null values, you can use Array(n).fill(null) function. It works in both Javascript and ReactJs. Check out this code example – Example…
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Create immutable copy of object in reactjs – Code Example
To create immutable copy of object in reactjs, you can use Object.assign() method. This method is also used to create a copy of state object. Since states should not be…
Using constructor in class component reactjs – Code Example
React components can have state by setting this.state in their constructors. this.state should be considered as private to a React component that it’s defined in. In this article we are going to…
Passing data through props in reactJS – Code Example
Learn how you can pass data from one component to another through props in react js. Here we have declared two class components – Board and Square. We are passing…
Using Lists (UL/OL) in ReactJs – Code Example
In this article we are going to learn how to use unordered (UL) and ordered (OL) lists in JSX in React JS codes. Here is the example – Source: Reactjs…
Using states in class component Reactjs – Code Example
A component can maintain internal state data with this.state. When a component’s state data changes, the rendered markup will be updated by re-invoking render(). Here we are using states in class component…
Using Render() in ReactJS – Code Example
Render() in reactjs is used to attach components and JSX to the DOM. This helps in generating the UI for the website. Source: Reactjs Docs
Solidity Enum Example
Saad Mushtaq
Introduction The word enum in solidity stands for Enumerable as it does in most of the other languages. Enum is a user defined data type which contains set of a…
Solidity struct as parameter
In Solidity it wasn’t possible to pass struct as parameter but with the introduction of experimental library ABIEncoderV2, it could be done. Solution Code Explanation In this code I have…
cannot import name ‘to_categorical’ from ‘keras.utils’
Python Tensorflow throws error “cannot import name ‘to_categorical’ from ‘keras.utils’” when you are using Tensorflow version 2 but implementing the older syntax. Solution Instead of using this syntax for importing…
pip is being invoked by an old script wrapper
Python throws error “pip is being invoked by an old script wrapper” either due to incompatible pip version or due to multiple versions of pip. Solution To resolve this error,…
Poetry could not find a pyproject.toml file
Python poetry throws error “Poetry could not find a pyproject.toml file” when it is not able to find pyproject.toml file in project directory. It means Poetry is not initialized properly.…
python run bash script in background
Python subprocess library is used to run processes like bash script in the background. It can create new processes, connect with their input/output/error pipes and obtain their error codes. Code…
Bootstrap tour links to other pages
In this article we will see how Bootstrap Tour links to other pages. By the end of this post we will create a multi page application with Bootstrap tour embedded…
Only length-1 arrays can be converted to python scalars
Numpy throws error – only length-1 (size-1) arrays can be converted to python scalars when you are passing an array to a Python inbuild function which expects single value. This…
aapt: error: resource android:color/system_neutral1_1000 not found
You will get aapt: error: resource android:color/system_neutral1_1000 not found when you are using Material-1.5.0-alpha03 or later and using compiledSdkVersion less than 31. Problem According to Material Component release notes, Make…
Es6 Array Limit First n Elements using Array.slice()
Teresia Wachira
Introduction We get the first n elements easily using the Array.slice() method. The slice() method returns selected elements in an array, as a new array but does not modify the…
Creating charts using google charts in ReactJS
Introduction Data visualization is an important concept, especially in situations where statistics are involved. And google charts have made it easy. It is a great way to present data and…
Convert bytes32 to string in Solidity
In solidity, you must have wondered which one will make my code more efficient and my smart contracts better – Is it bytes32 or string? Today we will learn how…
Contact Form in React Js using TailwindCSS
Introduction Web application users have the chance to contact the developer or team of the web app by using a contact form. Typically, “contact us” pages employ email as the…