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Articles tagged with #nodejs
map method The map method has its syntax shown below: array.map(func) func => func is the callback function. See the example below: const fruits = [ "Apple", "Orange", "Melon", "Banana", "Advocado" ]; const fruitsFunc = item => { return item.lengt...
An array is the collection of ordered items. These ordering collections make array index zero-based. Creating and Accessing an Array Creating an Array Arrays are created as an object. See the syntax below: array = new Array(item1, item2, ...,itemN);...
Numbers There are basically two types of numbers in JavaScript: Regular numbers: These are double-precision floating-point numbers stored in 64-bit format IEEE-754. The double-precision floating-point numbers are responsible for things like imprecis...
The optional chaining ?. is a safe way to access nested object properties, even if an intermediate property doesn't exist. Let's assume each user is required to fill an online form of name and address, but users mostly ignored the address input fiel...
Primitives are fundamental data types like strings, numbers, booleans, etc. These primitive data types can be worked on as objects (non-primitive). For example, a method on an object. See the syntax below: object.method() A method can also work on p...
A global variable in the global scope can also be used in a local scope. This means expressions in a local scope can reach out to variables in a global scope. See the example below: const name = 'Bello'; // global variable const outerFunc = () => { ...
