Sarah Adina

1621392754

How to compile LaTeX to PDF in VS Code (Windows)

In this tutorial, I will show you how to set up LaTeX Workshop for Visual Studio Code on Windows to compile .tex files to PDF and preview them in the editor.

🔗 Links:

Visual Studio Code - https://code.visualstudio.com/

LaTeX Workshop - https://marketplace.visualstudio.com/…

MiKTeX - https://miktex.org/

Perl - https://www.perl.org/

❤ Subscribe: http://bit.ly/SubscribeDPT

#visual-studio #vscode #pdf

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Buddha Community

How to compile LaTeX to PDF in VS Code (Windows)
Cayla  Erdman

Cayla Erdman

1594369800

Introduction to Structured Query Language SQL pdf

SQL stands for Structured Query Language. SQL is a scripting language expected to store, control, and inquiry information put away in social databases. The main manifestation of SQL showed up in 1974, when a gathering in IBM built up the principal model of a social database. The primary business social database was discharged by Relational Software later turning out to be Oracle.

Models for SQL exist. In any case, the SQL that can be utilized on every last one of the major RDBMS today is in various flavors. This is because of two reasons:

1. The SQL order standard is genuinely intricate, and it isn’t handy to actualize the whole standard.

2. Every database seller needs an approach to separate its item from others.

Right now, contrasts are noted where fitting.

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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

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

Houston  Sipes

Houston Sipes

1604088000

How to Find the Stinky Parts of Your Code (Part II)

There are more code smells. Let’s keep changing the aromas. We see several symptoms and situations that make us doubt the quality of our development. Let’s look at some possible solutions.

Most of these smells are just hints of something that might be wrong. They are not rigid rules.

This is part II. Part I can be found here.

Code Smell 06 - Too Clever Programmer

The code is difficult to read, there are tricky with names without semantics. Sometimes using language’s accidental complexity.

_Image Source: NeONBRAND on _Unsplash

Problems

  • Readability
  • Maintainability
  • Code Quality
  • Premature Optimization

Solutions

  1. Refactor the code
  2. Use better names

Examples

  • Optimized loops

Exceptions

  • Optimized code for low-level operations.

Sample Code

Wrong

function primeFactors(n){
	  var f = [],  i = 0, d = 2;  

	  for (i = 0; n >= 2; ) {
	     if(n % d == 0){
	       f[i++]=(d); 
	       n /= d;
	    }
	    else{
	      d++;
	    }     
	  }
	  return f;
	}

Right

function primeFactors(numberToFactor){
	  var factors = [], 
	      divisor = 2,
	      remainder = numberToFactor;

	  while(remainder>=2){
	    if(remainder % divisor === 0){
	       factors.push(divisor); 
	       remainder = remainder/ divisor;
	    }
	    else{
	      divisor++;
	    }     
	  }
	  return factors;
	}

Detection

Automatic detection is possible in some languages. Watch some warnings related to complexity, bad names, post increment variables, etc.

#pixel-face #code-smells #clean-code #stinky-code-parts #refactor-legacy-code #refactoring #stinky-code #common-code-smells

Emma Pacino

Emma Pacino

1618293912

What is the Method to Solve Window Update Error Code 0x80240034?

If the user encounters Window Update Error, then they should first check for update. This error occurs if your system files are damaged. In this blog, you will read the solution of the Window Update Error 0x80240034. For help or support, then they must call the customer care of Microsoft via www.office.com/setupOffice.com/myaccount

Method to Fix Window 10 Update Error Code 0x80240034:
  1. Use Windows Update Troubleshooter:  First, you should go to Start option and then you need to type Settings in the search box and then press Enter key. After this, you should navigate to the Update & Security option and then click on Troubleshoot option. Now, you have to find and then tap on Run the troubleshooter. At this point, you need to follow the on-screen direction to finish the procedure. Lastly, you must Restart your computer system.
  2. Run SFC Scan: You should press Windows+ Q altogether and then you have to type cmd in the search box. Now from the search results, you should right-click on the Command Prompt and then select Run as Administrator. Here, you will see the new cmd window appears on your computer screen. After this, you should type on sfc /scannow and then press the Enter key. At last, you should wait till the scan and the repair process completed.
  3. Run DISM Command: You should press Windows + X key together and then you need to run Command Prompt as an Admin. Now, you should copy and paste the command on the command line: dism.exe /Online /Cleanup-image /Restorehealth If in case, the DISM cannot get the files online, then you should use your installation USB or DVD. Then, you have to insert media and then type the command: dism.exe /Online /Cleanup-Image /RestoreHealth /Source:C:/Repair/Source/Windows /LimitAccess Remember, you should replace C:/Repair/Source/Windows with the path of your DVD or USB. For assistance, the computer user must Visit Microsoft official Website – office.com/setup.
  4. Download Update Manually: You should visit to the Microsoft Update Catalog website. Then, in the search box, you need to type the update code in the search box and press on Enter key. Now, from the list of matching updates you should find the update which has the same architecture according to your computer system. After this, you should tap on the Download button which is next to the update in order to download it. After you download the update, then you should run the setup file and then follow the directions. At last, when the update is finished, then you should restart your Windows PC.
  5. Run Full System Scan: Sometimes Window Update Error, results in a malware infection in your device. In order to fix the problem, you should perform a full system scan with your antivirus. It is advised you should use a fast and reliable antivirus which will not interfere with your system in any way. This antivirus will keep your device safe from cyber-attacks like malware and viruses and it will also protect your privacy from hackers.
  6. Reset Window Update Component: You should press Win + X key altogether and then select Command Prompt as an Admin from the list. When the Command Prompt open up on your device, then just following commands and press Enter key: net stop wuauserv net stop cryptSvc net stop bits net stop msiserver rmdir %windir%SoftwareDistribution /S /Q net start wuauserv net start cryptSvc net start bits net start msiserver At last, you should check if the problem is resolved or not.
The above method helps to fix Window Update Error 0x80240034. If the user needs any kind of help or support, then go to Microsoft Official site via www.office.com/setup.

Visit Here - How You Can Repair A Corrupt Word Document?

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