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  dot  product The  dot  tool returns the dot product of two arrays. import numpy A = numpy.array([ 1, 2 ]) B = numpy.array([ 3, 4 ]) print numpy.dot(A, B) #Output : 11 cross The  cross  tool returns the cross product of two arrays. import numpy A = numpy.array([ 1, 2 ]) B = numpy.array([ 3, 4 ]) print numpy.cross(A, B) #Output : -2 Task You are given two arrays   and  . Both have dimensions of  X . Your task is to compute their  matrix product . Input Format The first line contains the integer  . The next   lines contains   space separated integers of array  . The following   lines contains   space separated integers of array  . Output Format Print the matrix multiplication of   and  . Sample Input 2 1 2 3 4 1 2 3 4 Sample Output [[ 7 10] [15 22]] Solution import numpy n = int(input()) a = numpy.array([input().split() for _ in range(n)], int) b ...
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Pagination in PHP

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  Calculate total pages Different records on each page Calculate offset $limit = 5; if(isset($_REQUEST['page'])){ $page = $_REQUEST['page']; }else{ $page = 1; } $offset = ($page - 1) * $limit;     <!-- Pagination Start --> <div class="w3-row pagination">   <?php     $sql2 = "SELECT pro_id FROM project_request pr     INNER JOIN student s ON pr.pro_stu_id = s.stu_id     WHERE pr.pro_review = ?";       $result2 = $conn->prepare($sql2);     $result2->execute(array(0));     $row2 = $result2->fetchAll(PDO::FETCH_ASSOC);     if($result2->rowCount()){       $total_records = $result2->rowCount();       $total_pages = ceil($total_records/$limit);       echo '<ul>';       if($page > 1){         echo '<li class="w3-button w3-grey mx-1...
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Image update in PHP with updating of other fields - Update Image with other fields

    <form action="" method="POST" enctype="multipart/form-data">   <label for="name">Name</label>   <input type="text" class="w3-input w3-border" id="name" name="name" required value="<?php echo $row2['stu_name']; ?>">   <label for="email">Email</label>   <input type="email" class="w3-input w3-border" id="email" name="email" required value="<?php echo $row2['stu_email']; ?>" >  <label for="profilepic">Profile Picture <small> (Note : Image size should be less than 500 KB) </small></label>  <input type="hidden" name="old-image" value="<?php if(isset($img)){ echo $img; }  ?>">   <input type="file" class="w3-input w3-border w3-white" id="profilepic"...
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File upload using JavaScript with validation (Apply validation on frontend side)

 JavaScript is a client side scripting language. With JavaScript we can easily validate our file with extension, file size.  input element object .files   <form action="" method="POST" enctype="multipart/form-data" id="form"> <label>Upload</label> <input class="w3-input w3-white" id="file" name="file" type="file" /> <input name="upload" type="hidden" value="" /> <button id="Upload" name="upload" type="submit">Upload</button> </form> <div id="embed"></div> <script>  document.getElementById('Upload').addEventListener('click', (e) => {    e.preventDefault();    if(document.getElementById('file').value){ // console.log(document.getElementById('file').files);  All property of file     var files = document.getElementById('file...
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How to remove 000webhost watermark

  000webhost.com is a free web hosting service provider website. Which offer free and premium hosting services. 000webhost does not permit turn off banner powered by 000webhost with free account. There are some other method which will work. work. Paste this code in every page of your website or webpage. This will remove the Russia/Ukraine war watermark or banner from the footer of the webpage. Paste this code in the script tag at the end of the body element. document.addEventListener('DOMContentLoaded', () => { var disclaimer = document.querySelector("img[alt='www.000webhost.com']"); if(disclaimer){ disclaimer.remove(); } });
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File upload along with data and apply proper validation in PHP

  File : <form method="post" action="save-file.php" enctype="multipart/form-data">   <input name="file" type="file" />   <input name="submit" type="submit" /> </form> save-file.php if(isset($_POST['submit'])){ if((isset($_FILES['file']['name'])){ $errors = array(); $file_name = $_FILES['file']['name']; $file_size = $_FILES['file']['size']; $file_tmp = $_FILES['file']['tmp_name']; $file_type = $_FILES['file']['type']; $ext = explode('.', $file_name); $file_ext = end($ext); $extensions = array('pptx', 'PPTX','pdf', 'PDF', 'ppt', 'PPT', 'docx', 'DOCX'); if(in_array($file_ext, $extensions) === FALSE){ $errors[] = "This extension file is not all...
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How to remove (Russia/Ukrain war) watermark from 000webhost

000webhost.com is a free web hosting service provider website. Which offer free and premium hosting services. 000webhost does not permit turn off banner powered by 000webhost with free account. There are some other method which will work. work. Paste this code in every page of your website or webpage. This will remove the Russia/Ukraine war watermark or banner from the footer of the webpage. Paste this code in the script tag at the end of the body element. document.addEventListener('DOMContentLoaded', () => { var disclaimer = document.getElementsByClassName('disclaimer'); if(disclaimer){ disclaimer[0].remove() } }); This will remove watermark.
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