Express

Express

Express is a minimal and flexible Node.js web application framework, providing a robust set of features for building web applications.

Upload and Store Images in MySQL using Node.Js, Express, Express-FileUpload & Handlebars

Today we are going to explore the basic usage of Express-FileUpload. In addition to this, I will show you how you can save/update a user record with a profile image that you can upload.

Source Files:
https://raddy.co.uk/blog/upload-and-store-images-in-mysql-using-node-js-express-express-fileupload-express-handlebars/

Chapters:
0:00 Introduction:
1:16 NPM Project Setup
3:54 Creating Express Server
5:51 Setting up Layouts & Routes
9:46 Express Upload Form
21:50 User Card
33:40 Database
52:05 Ending

Credit:
Icons www.flaticon.com
Cat photo by Cédric VT on Unsplash
Upload Icon by Gregor Cresnar www.flaticon.com

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#node.js #express #express-fileupload #express-handlebars #mysql #upload and store images

Upload and Store Images in MySQL using Node.Js, Express, Express-FileUpload & Handlebars

Garmin Express | Garmin.com/Express | Garmin Express Update

We are available 24X7. Not just this, we also help with Garmin Express related needs, free Garmin Express Update, free updates for all Garmin devices, and lot more. Let us know your concern regarding Gramin Express, and we shall provide instant help!

#garmin express #garmin.com/express #garmin express update

Vincent Lab

Vincent Lab

1605177386

How to Rate Limit an Express App

In this video, I’ll show you how to rate limit an Express app.

#rate limiting #expressjs #express #express framework #express rest api #node api tutorial

How to Rate Limit an Express App
Hans  Marvin

Hans Marvin

1626725100

Learn Express JS by building a Project - Installing Express

In this video series, we are going to learn Express JS by building a project. Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.

Along the way we are going to learn what is Express and how it works. Along with Express, we are also going to learn about other dependencies that are required for the backend. Finally, we will create an application that uses CRUD(create, read, update and delete) functionality.

However, in this video, we will learn how to install express js in your application and how to create a server for your application to run.


Get the entire code of this series here : https://github.com/Bishwahangdewan/Learn-Express-by-building-a-Project


#express #expressjs #nodejs

#nodejs #expressjs #express #installing express #js

Learn Express JS by building a Project - Installing Express
Kieran  Stroman

Kieran Stroman

1591359240

[Hindi] Express.js Tutorial: Build RESTful APIs with Node and Express - Part 1

Express.js Tutorial: Building RESTful APIs with Node Express. nodejs tutorial with api building with get and post methods.

#express #apis #node #restful apis #express.js

[Hindi] Express.js Tutorial: Build RESTful APIs with Node and Express - Part 1
Kieran  Stroman

Kieran Stroman

1590518700

How to evaluate expressions during debugging in PyCharm

In this quick video, you will learn how to select your code and execute it in the right context by using the ‘evaluate expression’ feature in PyCharm.

#expression #express #pycharm

How to evaluate expressions during debugging in PyCharm
Kieran  Stroman

Kieran Stroman

1591910880

Regular Expressions (RegEx): Plainly Explained with Cheat Sheet to Appreciate Them

Regular expressions (or regex) are tools used to represent string patterns. They are used to detect, examine, modify, manipulate strings. Basically, if you want to find all the proper names in a text, you can use a regex. We know that a name contains only letters and starts with an uppercase letter. Regex allows us to transcribe the natural human phrase into a computer representation. Experienced with Python or Java and even Excel, they can be very useful for engineers, marketers or anyone else.

But regular expressions, at first glance, are unglamorous. One can be afraid of them, but wrongly so. With a few exceptions, they are used in the same way across all platforms. So I’m going to expose the essentials to know about regex with Python.

I have prepared you a cheat sheet you can download to sum up what will be seen in this post.

#data-analysis #python #data-science #programming #expressions #express

Regular Expressions (RegEx): Plainly Explained with Cheat Sheet to Appreciate Them

Mad Libs: Using regular expressions

From Tiny Python Projects by Ken Youens-Clark

Everyone loves Mad Libs! And everyone loves Python. This article shows you how to have fun with both and learn some programming skills along the way.


Take 40% off Tiny Python Projects by entering fccclark into the discount code box at checkout at manning.com.


When I was a wee lad, we used to play at Mad Libs for hours and hours. This was before computers, mind you, before televisions or radio or even paper! No, scratch that, we had paper. Anyway, the point is we only had Mad Libs to play, and we loved it! And now you must play!

We’ll write a program called mad.py  which reads a file given as a positional argument and finds all the placeholders noted in angle brackets like <verb>  or <adjective> . For each placeholder, we’ll prompt the user for the part of speech being requested like “Give me a verb” and “Give me an adjective.” (Notice that you’ll need to use the correct article.) Each value from the user replaces the placeholder in the text, and if the user says “drive” for “verb,” then <verb>  in the text replaces with drive . When all the placeholders have been replaced with inputs from the user, print out the new text.

#python #regular-expressions #python-programming #python3 #mad libs: using regular expressions #using regular expressions

Mad Libs: Using regular expressions
Madyson  Reilly

Madyson Reilly

1601055000

Regular Expressions: What and Why?

Regular expressions is a powerful search and replace technique that you probably have used even without knowing. Be it your text editor’s “Find and Replace” feature, validation of your http request body using a third party npm module or your terminal’s ability to return list of files based on some pattern, all of them use Regular Expressions in one way or the other. It is not a concept that programmers must definitely learn but by knowing it you are able to reduce the complexity of your code in some cases.

_In this tutorial we will be learning the key concepts as well as some use cases of Regular Expressions in _javascript.

How do you write a Regular Expression?

There are two ways of writing Regular expressions in Javascript. One is by creating a **literal **and the other is using **RegExp **constructor.

//Literal
const myRegex=/cat/ig

//RegExp
const myRegex=new RegExp('cat','ig')

While both types of expressions will return the same output when tested on a particular string, the benefit of using the RegExp constructor is that it is evaluated at runtime hence allowing use of javascript variables for dynamic regular expressions. Moreover as seen in this benchmark test the RegExp constructor performs better than the literal regular expression in pattern matching.

The syntax in either type of expression consists of two parts:

  • pattern : The pattern that has to be matched in a string.
  • flags : these are modifiers which are rules that describe how pattern matching will be performed.

#regular-expressions #javascript #programming #js #regex #express

Regular Expressions: What and Why?
Fleta  Dickens

Fleta Dickens

1626694620

Serve CSS JS and Images Files in Express JS | Use Middleware in Express | express.static

#stubborndevelopers
In this video we will learn below points:

  1. how we can use css, js and images in website created using express js in Node.js?
  2. how we can use inbuilt middleware app.use(express.static()) of express JS?

************ Node.JS Tutorial in English 2021 Playlist ************
https://www.youtube.com/watch?v=gs0X92Yx70s&list=PLllIEssCHLKdNEVWsBQ5zcCxLu8Xpsl0E&index=2

************ React.JS Tutorial in Hindi 2021 Playlist ************
https://www.youtube.com/watch?v=F2A1qXcskP8&list=PLllIEssCHLKdRqOrDJdPIeW7nrwPPfa46

#node.js #express.stati #css #js #express js

Serve CSS  JS and Images Files in Express JS | Use Middleware in Express | express.static

Creating a Programming Language in C++, Part 2

in this part of our series, we will cover one of the trickier (at least in my opinion) components of scripting a language engine, which is an essential building block for every programming language: the expression parser.

A question that a reader could ask—and rightfully so—is: Why don’t we simply use some sophisticated tools or libraries, something already at our disposal?

Why don’t we use Lex, YACC, Bison, Boost Spirit, or at least regular expressions?

Throughout our relationship, my wife has noticed a trait of mine that I cannot deny: Whenever faced with a difficult question, I make a list. If you think about it, it makes perfect sense—I am using quantity to compensate for the lack of quality in my answer.

I will do the same thing now.

  1. I want to use standard C++. In this case, that will be C++17. I think the language is quite rich on its own, and I am fighting the urge to add anything but the standard library into the mix.
  2. When I developed my first scripting language, I didn’t use any sophisticated tools. I was under pressure and on a tight deadline, yet I didn’t know how to use Lex, YACC, or anything similar. Therefore, I decided to develop everything manually.
  3. Later, I found a blog by an experienced programming language developer, who advised against using any of these tools. He said those tools solve the easier part of language development, so in any case, you are left with the difficult stuff. I cannot find that blog right now, as it was long ago, when both the internet and I were young.
  4. At the same time, there was a meme that said: “You have a problem which you decide to solve by using regular expressions. Now you have two problems.”
  5. I don’t know Lex, YACC, Bison, or anything similar. I know Boost Spirit, and it is a handy and amazing library, but I still prefer to have better control over the parser.
  6. I like to do those components manually. Actually, I could just give this answer and remove this list completely.

#creating an expression #expression parser #expression

Creating a Programming Language in C++, Part 2

A Gentle Introduction to Regular Expressions with R

We live in a data-centric age. Data has been described as the new oil. But just like oil, data isn’t always useful in its raw form. One form of data that is particularly hard to use in its raw form is unstructured data.

A lot of data is unstructured data. Unstructured data doesn’t fit nicely into a format for analysis, like an Excel spreadsheet or a data frame. Text data is a common type of unstructured data and this makes it difficult to work with. Enter regular expressions, or regex for short. They may look a little intimidating at first, but once you get started, using them will be a picnic!

More comfortable with python? Try my tutorial for using regex with python instead:

A Gentle Introduction to Regular Expressions with Python

Regular expressions are the data scientist’s most formidable weapon against unstructured text

towardsdatascience.com

The stringr Library

We’ll use the stringr library. The stringr library is built off a C library, so all of its functions are very fast.

To install and load the stringr library in R, use the following commands:

## Install stringer
install.packages("stringr")

## Load stringr
library(stringr)

See how easy that is? To make things even easier, most function names in the stringr package start with str. Let’s take a look at a couple of the functions we have available to us in this module:

  1. str_extract_all(string, pattern): This function returns a list with a vector containing all instances of pattern in string
  2. str_replace_all(string, pattern, replacement): This function returns string with instances of pattern in string replaced with replacement

You may have already used these functions. They have pretty straightforward applications without adding regex. Think back to the times before social distancing and imagine a nice picnic in the park, like the image above. Here’s an example string with what everyone is bringing to the picnic. We can use it to demonstrate the basic usage of the regex functions:

basicString <- "Drew has 3 watermelons, Alex has 4 hamburgers, Karina has 12 tamales, and Anna has 6 soft pretzels"

If I want to pull every instance of one person’s name from this string, I would simply pass the name and basic_string to str_extract_all():

basicExtractAll <- str_extract_all(basicString, "Drew")
print(basicExtractAll)

The result will be a list with all occurrences of the pattern. Using this example, basicExtractAll will have the following list with 1 vector as output:

[[1]]
[1] "Drew"

Now let’s imagine that Alex left his 4 hamburgers unattended at the picnic and they were stolen by Shawn. str_replace_all can replace any instances of Alex with Shawn:

basicReplaceAll <- str_replace_all(basicString, "Alex", "Shawn")
print(basicReplaceAll)

The resulting string will show that Shawn now has 4 hamburgers. What a lucky guy 🍔.

"Drew has 3 watermelons, Shawn has 4 hamburgers, Karina has 12 tamales, and Anna has 6 soft pretzels"

The examples so far are pretty basic. There is a time and place for them, but what if we want to know how many total food items there are at the picnic? Who are all the people with items? What if we need this data in a data frame for further analysis? This is where you will start to see the benefits of regex.

#regex #regular-expressions #r #text-processing #unstructured-data #express

A Gentle Introduction to Regular Expressions with R
Kieran  Stroman

Kieran Stroman

1591211640

Sending and Receiving Cookies from Express.js

Cookie management is not the most difficult thing to do in Express.js, but there are a lot of solutions out there to help you which can make things quite confusing. We’re going to look at a very raw implementation of cookies. If you want to learn more about what browser cookies are, I recommend reading this article first.

#express #cookies #express.js

Sending and Receiving Cookies from Express.js
Hans  Marvin

Hans Marvin

1626747060

Learn Express JS by building a Project - BodyParser

In this video series, we are going to learn Express JS by building a project. Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.

Along the way we are going to learn what is Express and how it works. Along with Express, we are also going to learn about other dependencies that are required for the backend. Finally, we will create an application that uses CRUD(create, read, update and delete) functionality.

In this video, we are going to use BodyParser dependency in order to get the data from the form.


Get the entire code of this series here : https://github.com/Bishwahangdewan/Learn-Express-by-building-a-Project


#express js #express #nodejs #js

Learn Express JS by building a Project - BodyParser
Madyson  Reilly

Madyson Reilly

1601069940

Function Expression vs Function Declaration in JavaScript

Function Expression vs Function Declaration in JavaScript.

It was until during one of the JavaScript mock interviews did I came across the term function expression.

The question was: What is the difference between these two syntax?

function x(){

}

let x = function(){

}

I was clueless for a moment. After thinking a little, I could only come up with: the second syntax invokes an _anonymous _function and is assigned to a variable.

I was alien to the term hoisting.

In this article, we will acquaint ourselves with three simple terms: function declaration,_ function expression, _and hoisting.

What is function declaration?

Function declaration is also known as _function statement. _It contains the name of the function, parameters, and a return statement. **Naming the function **is what sets function declaration apart. Parameters and return statement is optional.

Image for post

Function Declaration

What is function expression?

Function expression also has a name, parameters, and return statement. All of which are optional. The important thing to bear in mind is: the function here is _assigned _to a JavaScript variable.

Image for post

Function Expression

#function-expression #function-declaration #functions-in-javascript #coding #javascript #express

Function Expression vs Function Declaration in JavaScript