𝐖𝐡𝐚𝐭 𝐰𝐢𝐥𝐥 𝐛𝐞 𝐥𝐨𝐠𝐠𝐞𝐝 𝐭𝐨 𝐭𝐡𝐞 𝐜𝐨𝐧𝐬𝐨𝐥𝐞?

 𝐖𝐡𝐚𝐭 𝐰𝐢𝐥𝐥 𝐛𝐞 𝐥𝐨𝐠𝐠𝐞𝐝 𝐭𝐨 𝐭𝐡𝐞 𝐜𝐨𝐧𝐬𝐨𝐥𝐞?

​

𝐖𝐡𝐚𝐭 𝐰𝐢𝐥𝐥 𝐛𝐞 𝐥𝐨𝐠𝐠𝐞𝐝 𝐭𝐨 𝐭𝐡𝐞 𝐜𝐨𝐧𝐬𝐨𝐥𝐞?

​

Here is the answer & explanation of this question:

​

First, we have an object named “income” with three properties:

​

1. “𝐬𝐤𝐢𝐥𝐥𝐬”, which is set to 108.

2. “𝐦𝐨𝐧𝐭𝐡𝐥𝐲”, which is a method that calculates the monthly income based on the “𝐬𝐤𝐢𝐥𝐥𝐬” value.

3. “𝐲𝐞𝐚𝐫𝐥𝐲”, which is an arrow function meant to calculate the yearly income.

​

𝐄𝐱𝐩𝐥𝐚𝐧𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 “𝐦𝐨𝐧𝐭𝐡𝐥𝐲()” 𝐦𝐞𝐭𝐡𝐨𝐝:

​

1. “𝐦𝐨𝐧𝐭𝐡𝐥𝐲()” is a regular function. When you call “𝐢𝐧𝐜𝐨𝐦𝐞.𝐦𝐨𝐧𝐭𝐡𝐥𝐲()”, this refers to the “𝐢𝐧𝐜𝐨𝐦𝐞” object.

2. “𝐭𝐡𝐢𝐬.𝐬𝐤𝐢𝐥𝐥𝐬” inside the “𝐦𝐨𝐧𝐭𝐡𝐥𝐲()” method correctly refers to “𝐢𝐧𝐜𝐨𝐦𝐞.𝐬𝐤𝐢𝐥𝐥𝐬”, which is 108.

3. So, “𝐭𝐡𝐢𝐬.𝐬𝐤𝐢𝐥𝐥𝐬 * 𝟏𝟎𝟖” becomes “𝟏𝟎𝟖 * 𝟏𝟎𝟖”, which equals 11664.

4. Therefore, “𝐢𝐧𝐜𝐨𝐦𝐞.𝐦𝐨𝐧𝐭𝐡𝐥𝐲()” returns 11664.

​

𝐄𝐱𝐩𝐥𝐚𝐧𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 “𝐲𝐞𝐚𝐫𝐥𝐲” 𝐚𝐫𝐫𝐨𝐰 𝐟𝐮𝐧𝐜𝐭𝐢𝐨𝐧:

​

1. “𝐲𝐞𝐚𝐫𝐥𝐲” is defined as an arrow function.

2. Arrow functions do not have their own “𝐭𝐡𝐢𝐬” context; they inherit “𝐭𝐡𝐢𝐬” from the surrounding (lexical) context at the time they are defined.

3. In this case, “𝐭𝐡𝐢𝐬” in “yearly” refers to the global object (“𝐰𝐢𝐧𝐝𝐨𝐰” in browsers, “𝐠𝐥𝐨𝐛𝐚𝐥” in Node.js), not the “𝐢𝐧𝐜𝐨𝐦𝐞” object.

4. Since there is no “𝐬𝐤𝐢𝐥𝐥𝐬” property on the global object, “𝐭𝐡𝐢𝐬.𝐬𝐤𝐢𝐥𝐥𝐬” is “𝐮𝐧𝐝𝐞𝐟𝐢𝐧𝐞𝐝”.

5. As a result, “𝟖𝟖𝟖 * 𝐭𝐡𝐢𝐬.𝐬𝐤𝐢𝐥𝐥𝐬” becomes “𝟖𝟖𝟖 * 𝐮𝐧𝐝𝐞𝐟𝐢𝐧𝐞𝐝”, which is “𝐍𝐚𝐍” (Not a Number).

6. Therefore, “𝐢𝐧𝐜𝐨𝐦𝐞.𝐲𝐞𝐚𝐫𝐥𝐲()” returns “𝐍𝐚𝐍”.

​

𝐓𝐨 𝐬𝐮𝐦𝐦𝐚𝐫𝐢𝐳𝐞:

​

1. “𝐢𝐧𝐜𝐨𝐦𝐞.𝐦𝐨𝐧𝐭𝐡𝐥𝐲()” works as expected and returns 11664 because “𝐭𝐡𝐢𝐬” correctly refers to the “𝐢𝐧𝐜𝐨𝐦𝐞” object.

2. “𝐢𝐧𝐜𝐨𝐦𝐞.𝐲𝐞𝐚𝐫𝐥𝐲()” returns “𝐍𝐚𝐍” because “𝐭𝐡𝐢𝐬” inside the arrow function does not refer to the “𝐢𝐧𝐜𝐨𝐦𝐞” object, leading to “𝐭𝐡𝐢𝐬.𝐬𝐤𝐢𝐥𝐥𝐬” being “𝐮𝐧𝐝𝐞𝐟𝐢𝐧𝐞𝐝”.

​

​

​

𝐅𝐨𝐥𝐥𝐨𝐰 𝐭𝐡𝐢𝐬 𝐩𝐚𝐠𝐞 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐥𝐢𝐤𝐞 𝐭𝐡𝐢𝐬.

most frequently asked sql interview questions

 

task by b2broker

 Test task: Financial transactions system

We expect you to use SOLID, GRASP principles, design

patterns. Code check must be passed by phpstan, phpcs

analyzers. In README file in the test task you should

describe which patterns did you use and why.

Only business logic code required. MVC pattern is

forbidden, UI Interface is not required because there

is no reason for start application. That means you

should not write controllers and views.

Task Question:

Implement a set of classes for managing the financial

operations of an account.

There are three types of transactions: deposits, withdrawals

and transfer from account to account.

The transaction contains a comment, an amount, and a due

date.

Required methods:

 get all accounts in the system.

 get the balance of a specific account

 perform an operation

 get all account transactions sorted by comment in

alphabetical order.

 get all account transactions sorted by date.

The test task must be implemented without the use of

frameworks and databases. This is necessary in order to see

your coding style, ability to understand and implement the

task and demonstrate your skills.

task by myverkoper.com

 <!-- SELECT Rank

FROM Persons

WHERE Rank < (SELECT MAX(Rank) FROM Persons)

ORDER BY Rank DESC -->

task:2

With out using limit in query, display 2nd highest rank person

is it right

implement sorting without sort in php

task

task 1:<?php //Complete sorting functionality without using any inbuilt sorting related functions $arr = [50,20,35,15,45]; echo "Before Sorting <br/>"; print_r($arr); //sorting logic start //write your code here //sorting logic end echo "After Sorting <br/>" print_r($arr); ?>

task:2

With out using limit in query, display 2nd highest rank person

task 

programm

<?php
$arr = [50, 20, 35, 15, 45];

echo "Before Sorting <br/>";
print_r($arr);

// sorting logic start

$length = count($arr);
for ($i = 0; $i < $length - 1; $i++) {
    for ($j = 0; $j < $length - $i - 1; $j++) {
        if ($arr[$j] > $arr[$j + 1]) {
            // swap elements
            $temp = $arr[$j];
            $arr[$j] = $arr[$j + 1];
            $arr[$j + 1] = $temp;
        }
    }
}

// sorting logic end

echo "After Sorting <br/>";
print_r($arr);
?>

<!-- With out using limit in query, display 2nd highest rank person -->

<!-- SELECT Rank
FROM Persons
WHERE Rank < (SELECT MAX(Rank) FROM Persons)
ORDER BY Rank DESC -->

laravel tables

 add column

move from old column to new column

drop column

rename column

Laravel tip. When typing `make:migration` command, you usually use underscore symbol between parts, like `create_transactions_table`. But, alternatively, you can also put the name in quotes and use a SPACE as a delimiter.

how to remove cloumn with new migration file

how to craete

public function up(): void { Schema::table('settings_site', function (Blueprint $table) { $table->string('retailer_signatory')->nullable(); }); Schema::table('delivery_locations', function (Blueprint $table) { $table->dropColumn('test'); }); } write down method for this

what is down method for this

use Illuminate\Database\Migrations\Migration; use Illuminate\Database\Schema\Blueprint; use Illuminate\Support\Facades\Schema; class UpdateSiteSettingsAndDeliveryLocations extends Migration { public function up() { Schema::table('settings_site', function (Blueprint $table) { $table->string('retailer_signatory')->nullable(); }); Schema::table('delivery_locations', function (Blueprint $table) { $table->dropColumn('test'); }); } public function down() { Schema::table('settings_site', function (Blueprint $table) { $table->dropColumn('retailer_signatory'); }); Schema::table('delivery_locations', function (Blueprint $table) { $table->string('test')->nullable(); }); } }

====================

$table->string('retailer_signatory')->nullable()->change();

what is the down method fo rthis

$table->string('retailer_signatory')->nullable()->change();

$table->string('retailer_signatory')->nullable(false)->change();

==