Omar  Amin

Omar Amin

1611115749

Combine Multiple CSV Files with 7 Lines of Code using Pandas | Pandas Tutorial

Manually combining CSV files into one master is time consuming, and labor intensive, and especially if you have a large number of CSV files. So why not write a Python program to automate the task? And the best part is it will take less than 5 minutes to write the code.

In this tutorial, we will learn how to create a Python program to automating CSV merging.

🔔 Subscribe: https://www.youtube.com/c/JieJenn/featured

#python #pandas

What is GEEK

Buddha Community

Combine Multiple CSV Files with 7 Lines of Code using Pandas | Pandas Tutorial

I am Developer

1597559012

Multiple File Upload in Laravel 7, 6

in this post, i will show you easy steps for multiple file upload in laravel 7, 6.

As well as how to validate file type, size before uploading to database in laravel.

Laravel 7/6 Multiple File Upload

You can easily upload multiple file with validation in laravel application using the following steps:

  1. Download Laravel Fresh New Setup
  2. Setup Database Credentials
  3. Generate Migration & Model For File
  4. Make Route For File uploading
  5. Create File Controller & Methods
  6. Create Multiple File Blade View
  7. Run Development Server

https://www.tutsmake.com/laravel-6-multiple-file-upload-with-validation-example/

#laravel multiple file upload validation #multiple file upload in laravel 7 #multiple file upload in laravel 6 #upload multiple files laravel 7 #upload multiple files in laravel 6 #upload multiple files php laravel

Omar  Amin

Omar Amin

1611115749

Combine Multiple CSV Files with 7 Lines of Code using Pandas | Pandas Tutorial

Manually combining CSV files into one master is time consuming, and labor intensive, and especially if you have a large number of CSV files. So why not write a Python program to automate the task? And the best part is it will take less than 5 minutes to write the code.

In this tutorial, we will learn how to create a Python program to automating CSV merging.

🔔 Subscribe: https://www.youtube.com/c/JieJenn/featured

#python #pandas

Samanta  Moore

Samanta Moore

1621137960

Guidelines for Java Code Reviews

Get a jump-start on your next code review session with this list.

Having another pair of eyes scan your code is always useful and helps you spot mistakes before you break production. You need not be an expert to review someone’s code. Some experience with the programming language and a review checklist should help you get started. We’ve put together a list of things you should keep in mind when you’re reviewing Java code. Read on!

1. Follow Java Code Conventions

2. Replace Imperative Code With Lambdas and Streams

3. Beware of the NullPointerException

4. Directly Assigning References From Client Code to a Field

5. Handle Exceptions With Care

#java #code quality #java tutorial #code analysis #code reviews #code review tips #code analysis tools #java tutorial for beginners #java code review

Tyrique  Littel

Tyrique Littel

1604008800

Static Code Analysis: What It Is? How to Use It?

Static code analysis refers to the technique of approximating the runtime behavior of a program. In other words, it is the process of predicting the output of a program without actually executing it.

Lately, however, the term “Static Code Analysis” is more commonly used to refer to one of the applications of this technique rather than the technique itself — program comprehension — understanding the program and detecting issues in it (anything from syntax errors to type mismatches, performance hogs likely bugs, security loopholes, etc.). This is the usage we’d be referring to throughout this post.

“The refinement of techniques for the prompt discovery of error serves as well as any other as a hallmark of what we mean by science.”

  • J. Robert Oppenheimer

Outline

We cover a lot of ground in this post. The aim is to build an understanding of static code analysis and to equip you with the basic theory, and the right tools so that you can write analyzers on your own.

We start our journey with laying down the essential parts of the pipeline which a compiler follows to understand what a piece of code does. We learn where to tap points in this pipeline to plug in our analyzers and extract meaningful information. In the latter half, we get our feet wet, and write four such static analyzers, completely from scratch, in Python.

Note that although the ideas here are discussed in light of Python, static code analyzers across all programming languages are carved out along similar lines. We chose Python because of the availability of an easy to use ast module, and wide adoption of the language itself.

How does it all work?

Before a computer can finally “understand” and execute a piece of code, it goes through a series of complicated transformations:

static analysis workflow

As you can see in the diagram (go ahead, zoom it!), the static analyzers feed on the output of these stages. To be able to better understand the static analysis techniques, let’s look at each of these steps in some more detail:

Scanning

The first thing that a compiler does when trying to understand a piece of code is to break it down into smaller chunks, also known as tokens. Tokens are akin to what words are in a language.

A token might consist of either a single character, like (, or literals (like integers, strings, e.g., 7Bob, etc.), or reserved keywords of that language (e.g, def in Python). Characters which do not contribute towards the semantics of a program, like trailing whitespace, comments, etc. are often discarded by the scanner.

Python provides the tokenize module in its standard library to let you play around with tokens:

Python

1

import io

2

import tokenize

3

4

code = b"color = input('Enter your favourite color: ')"

5

6

for token in tokenize.tokenize(io.BytesIO(code).readline):

7

    print(token)

Python

1

TokenInfo(type=62 (ENCODING),  string='utf-8')

2

TokenInfo(type=1  (NAME),      string='color')

3

TokenInfo(type=54 (OP),        string='=')

4

TokenInfo(type=1  (NAME),      string='input')

5

TokenInfo(type=54 (OP),        string='(')

6

TokenInfo(type=3  (STRING),    string="'Enter your favourite color: '")

7

TokenInfo(type=54 (OP),        string=')')

8

TokenInfo(type=4  (NEWLINE),   string='')

9

TokenInfo(type=0  (ENDMARKER), string='')

(Note that for the sake of readability, I’ve omitted a few columns from the result above — metadata like starting index, ending index, a copy of the line on which a token occurs, etc.)

#code quality #code review #static analysis #static code analysis #code analysis #static analysis tools #code review tips #static code analyzer #static code analysis tool #static analyzer

I am Developer

1597499549

Ajax Multiple Image Upload with Progress bar with jQuery in Laravel

In this post, i will show you, how you can upload multiple file with progress bar in laravel using jQuery ajax.

So follow below given steps to create ajax multiple image upload with progress bar with jquery and laravel php.

Multiple File Upload with Progress bar Using jQuery and Laravel PHP

Now follow the below given simple and easy step to upload multiple file with progress bar in laravel using jQuery ajax:

  • Step 1: Download Laravel App
  • Step 2: Add Database Details
  • Step 3: Create Migration & Model
  • Step 4: Add Routes For Multiple File Upload
  • Step 5: Create Controller by Artisan
  • Step 6: Create Blade View
  • Step 7: Run Development Server

https://www.tutsmake.com/laravel-7-multiple-file-upload-with-progress-bar/

#multiple file upload with progress bar using jquery and laravel #laravel multiple file upload ajax with progress bar #how to upload multiple images with progress bar in laravel #laravel 7 multiple image upload example #image upload with progress bar laravel #laravel multiple image upload ajax