DEV Community: Samiur

Where does onetab store data

Samiur — Tue, 07 Dec 2021 20:40:17 +0000

OneTab is one of the well-known browser extensions that collapses all open tabs with one click and saves them as a simple list. From ONeTab, you can save this list as a web page, share it with your friends, or restore them all. But if this is your first time using it, all of these features can feel overwhelming. Don't worry, here is a step-by-step guide on how to use OneTab effectively.

Before you begin

The reason I recommend OneTab over another card manager is the memory usage. I have opened a lot of YouTube tabs that consume more than 1GB of memory, out of my 4GB of RAM. After enabling OneTab, it dropped to almost 44MB, which is a useful drop in memory usage on its own.

I know you already know this, but for those of you who don't, just go to Google and search for OneTab or click here. Then click Add to Chrome. It will automatically be added to Chrome.

You can also see the icon at the top right. To view the quick check or explore the settings panel, right-click on the icon.

It's clean and kind of reminds me of Windows XP. Above it shows the exact number of cards that have been condensed. Just below it shows the date and time of the creation of that specific card. Below you can see options like restore, delete, share as a webpage, etc.

Therefore, all the possible functions that you want to use are right in front of you. Some other options, such as settings, are present at the top right of the page, so there is no intrusion with the main content.

Features
Simply OneTab takes all your cards, condenses them, and puts them into one card, grouping them all. Then you tap and you get a window with a list of pages spread over several tabs.

Basics
This will help you condense all the tabs into one space so that you can expand them all at once by just clicking Restore All. This brings you to the same space before clicking on it. Another quick option is Remove All, which removes all the tabs that you have compressed as soon as you click on them. Although OneTab prompts you to remove tabs first, I suggest you be careful.

Share As Web Page
This is a useful tool when you want to share one group of tabs at a time, as a single accessible web page. By simply clicking on a group, you can send all the cards in that space as a link to anyone. There is also an added barcode that can open the web page while scanning. You, therefore, have the option of a static link and a QCR code.

Delete: I guess this is the function I use the most. It allows me to share all related web pages in one tab. It helps me when writing or reading about a specific topic because I can easily group and tag them.

Group functionality
Grouping all the tabs into one was one thing, but tagging them in groups is just something that helps me be more efficient. I easily name groups and keep them organized.

Get all the basic features separated by groups. But what if you want to add news cards?
As simple as it sounds, you can combine and drag items from one group to another.

Each new tab you close will form a new group that you can rename or add to another group from One Tab.

In addition, you can also lock the group which disables the delete function, which makes it an additional security feature, although I have used it very little.

Tab options

What if I want to open a certain group in a new window instead of the tab?

The options menu (on the right) allows you to modify these options to make better use of the extension. You can decide whether you want all collapsed tabs to open in the same window or a new one. So instead of just ungrouping the tabs, collapsing everything, and opening a group in a different window, it gave me more control over all of my images.

You can also turn off compression for cards locked on a single card. Thus, it is possible to block social networking sites such as Gmail, Facebook, Twitter, etc., and other frequently visited pages that are not affected by OneTab.Easy?

Duplicate tabs
I often open two identical pages and find that I'm just not using my browser space. Automatically removes tabs opened multiple times. You can turn it off depending on whether or not you want to open duplicate tabs.

Website context menu
You can open a OneTab settings menu on any web page by just right-clicking and hovering over the OneTab option. Some options allow you to choose a specific website.

You can choose if you want to send "Current Page" to OneTab or you can also completely restrict adding a website, from the menu. However, I would recommend it for its simplicity and to do so without a fancy user interface.

Hope this post helped you!

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Python convert scientific notation string to float

Samiur — Sun, 05 Dec 2021 18:20:41 +0000

Python convert scientific notation string to float

In this tutorial let us understand how to yield a number of a specific type.

Python supplies three different numeric types say int, float and complex.

int represent Integers. booleans are sub types of integers. Integers have unlimited precision.
float refers to the floating point numbers. A number containing a . or an exponential sign refer to a floating point number.
complex numbers have a real and imaginary part. If n is a complex number then n.real extracts the real part of n and n.imaginary extracts the imaginary part of n. A complex value is represented as x + yj appending j or J to the numeric literal yields an imaginary number.

The following constructors are used to produce an integer, a floating point and a complex number respectively - int(), float(), complex()

int(x) -> x is converted to integer
float(x) -> x is converted to a floating point
complex(x, y) -> converted to a complex number with x as a real value and y as an imaginary value.

Let us consider a simple code:

n = 34.56; print("integer number : ", int(n));
output:

PS C:\PycharmProjects\pythonProject> python sample.py integer number : 34

Scientific numbers are the special way of writing numbers in powers of 10. for example:

700 = 7 100 = 7 10^2 is the scientific notation of number 700

Let us consider a bigger number like,

6,300,000,000 = 63 10^8 or 6.3 10^9 so, this is the scientific notation of number 6,300,000,000.

Oftentimes e or E are used to represent the 10. Hence 6.3 e+09 is equivalent to 6.3 10^9

As we discussed about the data conversions above, float() constructor can be used to adorn a scientific notation string. Let us understand with a simple example:

n = 1.230000e+07; print("integer number : ", float(n));
Now, let us first calculate this manually

1.230000* 10 ^ 7 => 1230000 an integer , because the conversion is a floating pint number the result of this code should be 1230000.0

PS C:\PycharmProjects\pythonProject> python sample.py floating point number : 12300000.0

for more details

Python ASCII to int

Samiur — Thu, 10 Jun 2021 00:03:59 +0000

Table of contents
Overview
Convert ASCII to int
Ord ()
Example
ASCII Table
Summary
Tags
Overview
Like other programming languages, Python also uses type conversion. That is, converting one data type to another data type is called type conversion. Our goal is to convert ASCII Table to an integer.

“convert ascii to int python”
In this post we will see what is the method of ascii to int in Python. Friends, if you have read C ++, you must have heard the word ascii. The word ascii is derived from American standard code for information interchange. Used to denote the alphanumeric data type. This coding scheme was introduced by ISO. Now you are worried about what is ISO. It means International Standard Organization. This is a 7 bit coding scheme. This scheme has ASCII code values for different characters. Different codes for "A" and "a" have to be given to anyone who tries to learn it. They get scared and stop learning programming. I think these are very interesting codes. I enjoy working because I know a lot about the number system. The number system gives you data and Information is explained. A set of facts that does not have a clear meaning is called data. And raw data is processed to achieve the desired results. Processed data is called information. The ASCII code represents 256 characters. I will also show you the ASCII Table so that you can understand and you can understand well.We can also convert ascii to integer in Python.

Ord( )

To get the ASCII code of a character, use the ord() function.

>>> ord("a") 97
 >>> chr(97) 'a'

Example:

>>> ord('h') 
104 
>>> ord('a') 
97 
>>> ord('^') 
94

Digit 0 1 2 3 4 5 6 7 8 9

Decimal 48 49 50 51 52 53 54 55 56 57

Octal 060 061 062 063 064 065 066 067 071 072

Hex 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39

ASCII Table

Summary
Today we understand kodlog website, I try to explain how to convert ascii to int in python . I hope after reading this article you will be able to understand the value of ascii. I would like to have feedback from my kodlog site. Please post your feedback, question, or comments about this article.

How to add items into an Array in C#

Samiur — Fri, 04 Jun 2021 17:57:38 +0000

By the definition, an array is stored at contiguous memory locations in order that initially it size is fixed. Actually array identifier holds only the reference of memory location and access of elements using index is performed by the following mathematical formula:

location of arr[i] = location of arr[0] + i * size of each element.
Consider we've an array of integer(Int32) arr with length of 5, in order that it have contiguous 5 integers valued allocated memory reference. Since every integer needs 4 bytes, so total referenced size of allocation is bounded in 20 bytes. Let first allocated location is 2020441248 and last allocated location is 2020441229. If we used 0 based indexes, then if we attempt to access arr[5] or quite index of 5 the reference failed to access because arr[5] requires next contiguous 4 bytes [2020441228 to 2020441225] from memory allocation but the identifier isn't conscious of these locations. In order that if we try access any index which is bigger than the array length, then it'll throw an IndexOutOfRangeException runtime exception with a default message like this, "index was outside the bounds of the array”.

How to add items into an Array
In C#, It is not possible to change the array size once is created. So that make sure that your it doesn't have possibility of attempt to access any index of outside than bounded length.

using System;
namespace MainConsole
{
class Program
{
static void Main()
{
int[] terms = new int[400];
for (int runs = 0; runs < 400; runs++)
{
terms[runs] = value;
}
}

}

Alternatively, you can usese List or any of other revalant data structure from System.Collection.Generic namespace so that we can apply methods and change the length of collection dynamically like push(), pop() or add(), remove() etc.

using System;
namespace MainConsole
{
class Program
{
static void Main()
{
List termsList = new List();
for (int runs = 0; runs < 400; runs++)
{
termsList.Add(value);
}

       // It is possible to convert it back into an array
       int[] terms = termsList.ToArray();
    }

}

}

Click to see more

What is the difference between jdk and jre

Samiur — Fri, 04 Jun 2021 12:13:36 +0000

JRE stands for Java Runtime Environment. Java Runtime Environment , JRE is a package that contains everything that is needed to run a compiled Java program. This includes the Java Virtual Machine (JVM), the java command ,the Java Class Library,and other infrastructure. It should be noted that for Java Runtime Environment cannot be used to create a new java programs.

The Java Development Kit or JDK is the, the full-featured SDK for Java. That means It has what the Java Runtime Environment has including the compiler (javac) and tools (like javadoc and jdb). It has the ability to create and compile java programs.

Java Runtime Environment is for people who only care about running Java programs and note compiling them. If this is you , Java Runtime Environment is all you need. However, if you to create and compile java programs , you need to install the JDK instead.

Even though some times you donot intend to do any Java development on your computer, you will still require the JDK installed. For instance, you may be in the process of deploying a web application with JSP. This means you are essentially running the Java programs inside the application server. This is the reason you would need the JDK. The reason being that the application server will convert JSP into Java servlets and needs to use the JDK to compile the servlets. There are multiple examples of his . Feel free to do more research

I also got that on another site

Max size of array in C++

Samiur — Fri, 04 Jun 2021 08:59:03 +0000

I also got that on another site
https://kodyoon.com/

Max size of array in c++
In this post, we will learn about the Max size of array in C++. C++ has various inbuilt functions
The C++ function std::array::max_size() is used to get the maximum number of elements that can be held by array container.

Declaration
Following is the declaration for std::array::max_size() function form std::array header.

constexpr size_type max_size() noexcept;
Return Value
Returns the maximum number of elements that can be held by array container. This value is always same as the second parameter of the array template used to instantiate array.

Time complexity
Constant i.e. O(1)
Example
The following example shows the usage of std::array::max_size() function.

include

using namespace std;

int main(void) {

arrayarr; /* array of 10 integers */

cout << "maximum size of arr = " << arr.max_size()
<< endl;

cout << "size of arr = " << arr.size()
<< endl;

return 0;
}
this will produce the following result −

maximum size of arr = 10
size of arr = 10
The array we created contains 10 integers. And therefore, we get the maximum size = 10

C++ does not impose any limits for the dimensions of an array. But as the array has to be stored somewhere in memory, so memory-related limits imposed by other parts of the computer system apply. Note that these limits do not directly relate to the dimensions (=number of elements) of the array, but rather to its size (=amount of memory taken).

Hope this post be helpful and useful to you.

Thank you

How to add single quote in SQL query string

Samiur — Wed, 02 Jun 2021 15:36:25 +0000

In this post, we will learn about How to add single quote in sql query string.

when we’re creating queries that contain text, we use the single quote character to delimit the beginning and ending of our text value. For example, in this query, you can see where I have a single quote that is delimiting the beginning and end here of a text, which is a comma and space.

SELECT LastName + ', ' + FirstName as LastFirst
FROM Person.Person
Example SQL with Quotes
So here I have an example where I’ve declared some text, and I’m setting the text equal to my parent’s car is broken. And here you can see I have a possessive “s”, with a single quote.

DECLARE @test as NVARCHAR(400)

SET @text= ‘My Parent’s car is broken.’
'My Parent's car is broken.'

And what’s happening here is just that, you’ll see some syntax errors, and the SQL is recognizing this first single quote as being a delimiter.

It thinks that the text part is my parent, and it doesn’t know what’s going on back here with the S, and then, the car is broken. It doesn’t understand that this quote, that’s really part of my phrase, is data, and that meant to be the delimiters for the statement.

To get around this, what we do is we use a fancy term. It’s called escaping the quote, and then in SQL, the convention to do that is to put another quote in front of it.

'My Parent’’s car is broken.'

So now I have two single quotes, and as you can see, the whole thing has turned red, so it’s recognizing the whole thing as a text value. And it says, my parent’s car is broken. So this now is a proper statement.

See more examples
Use two single quotes: ''

select *, 'INSERT INTO San_Endereco (Endereco_Id, Logradouro_Id, Bairro_Id, CEP, Logradouro, Livre) VALUES

(''' + CAST(Endereco_Id as varchar) + ''','''

CAST(Logradouro_Id as varchar) + ''','''
CAST(Bairro_Id as varchar) + ''','''
CAST (CEP as varchar) + ''','''
CAST(Logradouro as varchar) + ''','''
CAST(Livre as varchar) + ''')''' as teste FROM San_Endereco

Hope this post be thankful and useful to you
Thank You

What is x++ in java

Samiur — Wed, 02 Jun 2021 10:46:28 +0000

In java, an operand can be either a value of constant or a variable. Arithmatic operations are classified in 3 type, unary, binary and complex operation.

Unary operation: where only a single operand and a single operator perforemd the operation on it.
Binary operation: where two operand and a single operator perforemd the operation in between them.
Complex operation: which performed in between more than two operand.
What is x++
Here x is an operand which is a variable with a numeric value type like short, int, float, double or long etc. the ++ is an unary (icremental) operator which increase the value of the variable x by 1.

By the definition, x++ is a postfix form. The variables value is first used in the expression and then it is incremented after the operation. In simple, it is shorthand for i += 1.

Hence the operator placed at the end of the operand so that the containing statement will be interprated first and then will be performed the unary (increment) operation.

public class KodLogs{

 public static void main(String []args){
    int x = 50;
    //First will be printed 50, then it will be increased by 1.
    System.out.println(x++); 
    System.out.println(x); 
 }

}
Most of the time it used for incrementing local value inside the loop.

public class KodLogs{

 public static void main(String []args){
    for (int x = 0; x < 5; x++) {
         System.out.println(i);
    }

 }

}