How JavaScript Works ?

Any JavaScript code runs on any browser.
How JavaScript code run in a browser ?
Because every browser has JavaScript engine. As a google chrome has V8 engine, Mozilla Firefox has SpiderMonkey and etc .
So when any JavaScript code comes to the browser then Parser will execute the code line by line and produce a data structure called Abstract Syntax Tree (AST). If Parser produce the AST then the code translate to Machine Code using of AST. Once the code converted into Machine Code then the actual code will run.

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sum(1)(2)(3)(4)..( n)() in JavaScript

console.log('sum(1)(2)(3)(4)..( n)()'); // Solution 1: let sum = function (a) { return function (b) { if (b) { return sum(a + b); } return a; } } let result = sum(1)(2)(3)(4)(5)(); console.log(result); // 15 // Solution 2: let sum = (a) => (b) => (b) ? sum(a+b) : a; let result = sum(1)(2)(3)(4)(5)(); console.log(result); // 15

Closures in JavaScript

A closure is the wrapping up of function and it's surrounding variables with in a function or lexical scope. In the other way we can say, we can access the outer function scope from the inner function. So we can say, closure are created when functions are created. Example of closure: function outerMethod() { var name = 'Hello World'; function innerMethod() { console.log(name); } innerMethod(); } outerMethod(); So output of the above example is: Hello World Here the name variable is in the scope of outer function and we are accessing from the inner function. This is closure. More understand about closure with it's lexical scoping: In JavaScript we can return a function within another function. Please check the below example. function outerMethod() { var name = 'Hello World'; ...

Angular Chart Builder

This is my first angular library, named angular-chart-builder . It's a license free npm library. Anyone can install and integrate this library to there own angular project. Now the angular-chart-builder library have two types of charts that is Progress Bar and Pie Chart . To get the library, please check the below url: https://www.npmjs.com/package/angular-chart-builder

Parameswar Mondal

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