Alayna  Rippin

Alayna Rippin

1597003200

Sum of elements of a Geometric Progression (GP) in a given range

Given a Geometric Progression series in arr[] and Q queries in the form of [L, R], where L is the left boundary of the range and R is the right boundary. The task is to find the sum of the Geometric Progression elements in the given range.

Note: The range is 1-indexed and** 1 ≤ L, R ≤ N**, where N is the size of arr.

Examples:

Input:_ arr[] = {2, 4, 8, 16, 32, 64, 128, 256}, Q = [[2, 4], [2, 6], [5, 8]] _

Output:

_28 _

_124 _

480

Explanation:

_Range 1: arr = {4, 8, 16}. Therefore sum = 28 _

_Range 2: arr = {4, 8, 16, 32, 64}. Therefore sum = 124 _

Range 3: arr = {32, 64, 128, 256}. Therefore sum = 480

Input:_ arr[] = {7, 7, 7, 7, 7, 7}, Q = [[1, 6], [2, 4], [3, 3]] _

Output:

42

_21 _

_7 _

Explanation:

Range 1: arr = {7, 7, 7, 7, 7, 7}. Therefore sum = 42

_Range 2: arr = {7, 7, 7}. Therefore sum = 21 _

Range 3: arr = {7}. Therefore sum = 7

Approach: Since the given sequence is an Geometric progression, the sum can be easily found out in two steps efficiently:

  1. Get the first element of the range.
  2. If **d = 1, **then multiply **d*k **to it, else multiply the (dk – 1)/(d – 1) to it, where d is the common ratio of the GP and k is number of elements in the range.

For example:

Suppose a[i] be the first element of the range, d be the common ratio of GP and k be the number of elements in the given range.

Then the sum of the range would be

_= a[i] + a[i+1] + a[i+2] + …… + a[i+k-1] _

_= a[i] + (a[i] * d) + (a[i] * d * d) + …. + (a[i] * dk) _

_= a[i] * (1 + d + … + dk) _

= a[i] * (dk – 1)/(d – 1)

Below is the implementation of the above approach:

Python3

## Python program to

## find the sum of elements

## of an GP in the given range

## Function to find sum in the given range

**def** findSum(arr, n, left, right):

## Find the value of k

k **=** right **-** left **+** 1

## Find the common difference

d **=** arr[``1``] **//** arr[``0``]

## Find the sum

ans **=** arr[left **-** 1``]

**if** d **==** 1``:

ans **=** ans ***** d ***** k

**else**``:

ans **=** ans ***** (d ****** k **-** 1``) **//** (d **-**``1``)

**return** ans

## Driver code

**if** __name__ **==** '__main__'``:

arr **=** [ 2``, 4``, 8``, 16``, 32``, 64``, 128``, 256 ]

queries **=** 3

q **=** [[ 2``, 4 ], [ 2``, 6 ], [ 5``, 8 ]]

n **=** len``(arr)

**for** i **in** range``(queries):

**print**``(findSum(arr, n, q[i][``0``], q[i][``1``]))

Output:

28
124
480
  • Time complexity:_ O(Q) _
  • Space complexity:_ O(1)_

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

#arrays #mathematical #geometric progression #css #python

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Sum of elements of a Geometric Progression (GP) in a given range
Hunter  Krajcik

Hunter Krajcik

1674813120

Validate Multi Step Form Using jQuery

In this article, we will see how to validate multi step form wizard using jquery. Here, we will learn to validate the multi step form using jquery. First, we create the multi step form using bootstrap. Also, in this example, we are not using any jquery plugin for multi step form wizard.

So, let's see jquery multi step form with validation, how to create multi step form, multi step form wizard with jquery validation, bootstrap 4 multi step form wizard with validation, multi step form bootstrap 5, and jQuery multi step form with validation and next previous navigation.

Add HTML:

<html lang="en">
</head>
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&display=swap" rel="stylesheet">
</head>
<body>  
    <div class="main">
      <h3>How To Validate Multi Step Form Using jQuery - Websolutionstuff</h3>
        <form id="multistep_form">
            <!-- progressbar -->
            <ul id="progress_header">
                <li class="active"></li>
                <li></li>
                <li></li>
            </ul>
            <!-- Step 01 -->
            <div class="multistep-box">
                <div class="title-box">
                    <h2>Create your account</h2>
                </div>
                <p>
                    <input type="text" name="email" placeholder="Email" id="email">
                    <span id="error-email"></span>
                </p>
                <p>
                    <input type="password" name="pass" placeholder="Password" id="pass">
                    <span id="error-pass"></span>
                </p>
                <p>
                    <input type="password" name="cpass" placeholder="Confirm Password" id="cpass">
                    <span id="error-cpass"></span>
                </p>
                <p class="nxt-prev-button"><input type="button" name="next" class="fs_next_btn action-button" value="Next" /></p>
            </div>
            <!-- Step 02 -->
            <div class="multistep-box">
                <div class="title-box">
                    <h2>Social Profiles</h2>
                </div>
                <p>
                    <input type="text" name="twitter" placeholder="Twitter" id="twitter">
                    <span id="error-twitter"></span>
                </p>
                <p>
                    <input type="text" name="facebook" placeholder="Facebook" id="facebook">
                    <span id="error-facebook"></span>
                </p>
                <p>
                    <input type="text" name="linkedin" placeholder="Linkedin" id="linkedin">
                    <span id="error-linkedin"></span>
                </p>
                <p class="nxt-prev-button">
                    <input type="button" name="previous" class="previous action-button" value="Previous" />
                    <input type="button" name="next" class="ss_next_btn action-button" value="Next" />
                </p>
            </div>
            <!-- Step 03 -->
            <div class="multistep-box">
                <div class="title-box">
                    <h2>Personal Details</h2>
                </div>
                <p>
                    <input type="text" name="fname" placeholder="First Name" id="fname">
                    <span id="error-fname"></span>
                </p>
                <p>
                    <input type="text" name="lname" placeholder="Last Name" id="lname">
                    <span id="error-lname"></span>
                </p>
                <p>
                    <input type="text" name="phone" placeholder="Phone" id="phone">
                    <span id="error-phone"></span>
                </p>
                <p>
                    <textarea name="address" placeholder="Address" id="address"></textarea>
                    <span id="error-address"></span>
                </p>
                <p class="nxt-prev-button"><input type="button" name="previous" class="previous action-button" value="Previous" />
                    <input type="submit" name="submit" class="submit_btn ts_next_btn action-button" value="Submit" />
                </p>
            </div>
        </form>
        <h1>You are successfully logged in</h1>
    </div>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.0/jquery.easing.js" type="text/javascript"></script>
</body>
</html>

Add CSS:

body {
    display: inline-block;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background-image: url("https://img1.akspic.com/image/80377-gadget-numeric_keypad-input_device-electronic_device-space_bar-3840x2160.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    margin: 0;
    font-weight: 400;
    font-family: 'Roboto', sans-serif;
}
body:before {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}
.main {
    position: absolute;
    left: 0;
    right: 0;
    top: 30px;
    margin: 0 auto;
    height: 515px;
}
input:-internal-autofill-selected {
    background-color: #fff !important;
}
#multistep_form {
    width: 550px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    height: 100%;
    z-index: 999;
    opacity: 1; 
    visibility: visible; 
}
/*progress header*/
#progress_header {
    overflow: hidden;
    margin: 0 auto 30px;
    padding: 0;
}
#progress_header li {
    list-style-type: none;
    width: 33.33%;
    float: left;
    position: relative;
    font-size: 16px;
    font-weight: bold;
    font-family: monospace;
    color: #fff;
    text-transform: uppercase;
}
#progress_header li:after {
    width: 35px;
    line-height: 35px;
    display: block;
    font-size: 22px;
    color: #888;
    font-family: monospace;
    background-color: #fff;
    border-radius: 100px;
    margin: 0 auto;
    background-repeat: no-repeat;
    font-family: 'Roboto', sans-serif;
}
#progress_header li:nth-child(1):after {
    content: "1";
}
#progress_header li:nth-child(2):after {
    content: "2";
}
#progress_header li:nth-child(3):after {
    content: "3";
}
#progress_header li:before {
    content: '';
    width: 100%;
    height: 5px;
    background: #fff;
    position: absolute;
    left: -50%;
    top: 50%;
    z-index: -1;
}
#progress_header li:first-child:before {
    content: none;
}
#progress_header li.active:before, 
#progress_header li.active:after {
    background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
    color: #fff !important;
    transition: all 0.5s;
}
/*title*/
.title-box {
    width: 100%;
    margin: 0 0 30px 0;
}
.title-box h2 {
    font-size: 22px;
    text-transform: uppercase;
    color: #2C3E50;
    margin: 0;
    font-family: cursive;
    display: inline-block;
    position: relative;
    padding: 0 0 10px 0;
    font-family: 'Roboto', sans-serif;
}
.title-box h2:before {
    content: "";
    background: #6ddc8b;
    width: 70px;
    height: 2px;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 auto;
    display: block;
}
.title-box h2:after {
    content: "";
    background: #6ddc8b;
    width: 50px;
    height: 2px;
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    margin: 0 auto;
    display: block;
}
/*Input and Button*/
.multistep-box {
    background: white;
    border: 0 none;
    border-radius: 3px;
    box-shadow: 1px 1px 55px 3px rgba(255, 255, 255, 0.4);
    padding: 30px 30px;
    box-sizing: border-box;
    width: 80%;
    margin: 0 10%;
    position: absolute;
}
.multistep-box:not(:first-of-type) {
    display: none;
}
.multistep-box p {
    margin: 0 0 12px 0;
    text-align: left;
}
.multistep-box span {
    font-size: 12px;
    color: #FF0000;
}
input, textarea {
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin: 0;
    width: 100%;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
    color: #2C3E50;
    font-size: 13px;
    transition: all 0.5s;
    outline: none;
}
input:focus, textarea:focus {
    box-shadow: inset 0px 0px 50px 2px rgb(0,0,0,0.1);
}
input.box_error, textarea.box_error {
    border-color: #FF0000;
    box-shadow: inset 0px 0px 50px 2px rgb(255,0,0,0.1);
}
input.box_error:focus, textarea.box_error:focus {
    box-shadow: inset 0px 0px 50px 2px rgb(255,0,0,0.1);
}
p.nxt-prev-button {
    margin: 25px 0 0 0;
    text-align: center;
}
.action-button {
    width: 100px;
    font-weight: bold;
    color: white;
    border: 0 none;
    border-radius: 1px;
    cursor: pointer;
    padding: 10px 5px;
    margin: 0 5px;
    background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b);
    transition: all 0.5s;
}
.action-button:hover, 
.action-button:focus {
    box-shadow: 0 0 0 2px white, 0 0 0 3px #6ce199;
}
.form_submited #multistep_form {
    opacity: 0; 
    visibility: hidden; 
}
.form_submited h1 {
    -webkit-background-clip: text;
    transform: translate(0%, 0%);
    -webkit-transform: translate(0%, 0%);
    transition: all 0.3s ease;
    opacity: 1;
    visibility: visible;
}
h1 {
    margin: 0;
    text-align: center;
    font-size: 90px;
    background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
    background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
    color: transparent;
    -webkit-background-clip: text;
    -webkit-background-clip: text;
    transform: translate(0%, -80%);
    -webkit-transform: translate(0%, -80%);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    left: 0;
    right: 0;
    margin: 0 auto;
    text-align: center;
    top: 50%;
}
h3{
  color:#fff;
  text-align:center;
  margin-bottom:20px;
}

Add jQuery:

var current_slide, next_slide, previous_slide;
var left, opacity, scale;
var animation;

var error = false;

// email validation
$("#email").keyup(function() {
    var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
    if (!emailReg.test($("#email").val())) {
        $("#error-email").text('Please enter an Email addres.');
        $("#email").addClass("box_error");
        error = true;
    } else {
        $("#error-email").text('');
        error = false;
        $("#email").removeClass("box_error");
    }
});
// password validation
$("#pass").keyup(function() {
    var pass = $("#pass").val();
    var cpass = $("#cpass").val();

    if (pass != '') {
        $("#error-pass").text('');
        error = false;
        $("#pass").removeClass("box_error");
    }
    if (pass != cpass && cpass != '') {
        $("#error-cpass").text('Password and Confirm Password is not matched.');
        error = true;
    } else {
        $("#error-cpass").text('');
        error = false;
    }
});
// confirm password validation
$("#cpass").keyup(function() {
    var pass = $("#pass").val();
    var cpass = $("#cpass").val();

    if (pass != cpass) {
        $("#error-cpass").text('Please enter the same Password as above.');
        $("#cpass").addClass("box_error");
        error = true;
    } else {
        $("#error-cpass").text('');
        error = false;
        $("#cpass").removeClass("box_error");
    }
});
// twitter
$("#twitter").keyup(function() {
    var twitterReg = /https?:\/\/twitter\.com\/(#!\/)?[a-z0-9_]+$/;
    if (!twitterReg.test($("#twitter").val())) {
        $("#error-twitter").text('Twitter link is not valid.');
        $("#twitter").addClass("box_error");
        error = true;
    } else {
        $("#error-twitter").text('');
        error = false;
        $("#twitter").removeClass("box_error");
    }
});
// facebook
$("#facebook").keyup(function() {
    var facebookReg = /^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/;
    if (!facebookReg.test($("#facebook").val())) {
        $("#error-facebook").text('Facebook link is not valid.');
        $("#facebook").addClass("box_error");
        error = true;
    } else {
        $("#error-facebook").text('');
        error = false;
        $("#facebook").removeClass("box_error");
    }
});
// linkedin
$("#linkedin").keyup(function() {
    var linkedinReg = /(ftp|http|https):\/\/?(?:www\.)?linkedin.com(\w+:{0,1}\w*@)?(\S+)(:([0-9])+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
    if (!linkedinReg.test($("#linkedin").val())) {
        $("#error-linkedin").text('Linkedin link is not valid.');
        $("#linkedin").addClass("box_error");
        error = true;
    } else {
        $("#error-linkedin").text('');
        error = false;
        $("#linkedin").removeClass("box_error");
    }
});
// first name
$("#fname").keyup(function() {
    var fname = $("#fname").val();
    if (fname == '') {
        $("#error-fname").text('Enter your First name.');
        $("#fname").addClass("box_error");
        error = true;
    } else {
        $("#error-fname").text('');
        error = false;
    }
    if ((fname.length <= 2) || (fname.length > 20)) {
        $("#error-fname").text("User length must be between 2 and 20 Characters.");
        $("#fname").addClass("box_error");
        error = true;
    }
    if (!isNaN(fname)) {
        $("#error-fname").text("Only Characters are allowed.");
        $("#fname").addClass("box_error");
        error = true;
    } else {
        $("#fname").removeClass("box_error");
    }
});
// last name
$("#lname").keyup(function() {
    var lname = $("#lname").val();
    if (lname != lname) {
        $("#error-lname").text('Enter your Last name.');
        $("#lname").addClass("box_error");
        error = true;
    } else {
        $("#error-lname").text('');
        error = false;
    }
    if ((lname.length <= 2) || (lname.length > 20)) {
        $("#error-lname").text("User length must be between 2 and 20 Characters.");
        $("#lname").addClass("box_error");
        error = true;
    }
    if (!isNaN(lname)) {
        $("#error-lname").text("Only Characters are allowed.");
        $("#lname").addClass("box_error");
        error = true;
    } else {
        $("#lname").removeClass("box_error");
    }
});
// phone
$("#phone").keyup(function() {
    var phone = $("#phone").val();
    if (phone != phone) {
        $("#error-phone").text('Enter your Phone number.');
        $("#phone").addClass("box_error");
        error = true;
    } else {
        $("#error-phone").text('');
        error = false;
    }
    if (phone.length != 10) {
        $("#error-phone").text("Mobile number must be of 10 Digits only.");
        $("#phone").addClass("box_error");
        error = true;
    } else {
        $("#phone").removeClass("box_error");
    }
});
// address
$("#address").keyup(function() {
    var address = $("#address").val();
    if (address != address) {
        $("#error-address").text('Enter your Address.');
        $("#address").addClass("box_error");
        error = true;
    } else {
        $("#error-address").text('');
        error = false;
        $("#address").removeClass("box_error");
    }
});

// first step validation
$(".fs_next_btn").click(function() {
    // email
    if ($("#email").val() == '') {
        $("#error-email").text('Please enter an email address.');
        $("#email").addClass("box_error");
        error = true;
    } else {
        var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
        if (!emailReg.test($("#email").val())) {
            $("#error-email").text('Please insert a valid email address.');
            error = true;
        } else {
            $("#error-email").text('');
            $("#email").removeClass("box_error");
        }
    }
    // password
    if ($("#pass").val() == '') {
        $("#error-pass").text('Please enter a password.');
        $("#pass").addClass("box_error");
        error = true;
    }
    if ($("#cpass").val() == '') {
        $("#error-cpass").text('Please enter a Confirm password.');
        $("#cpass").addClass("box_error");
        error = true;
    } else {
        var pass = $("#pass").val();
        var cpass = $("#cpass").val();

        if (pass != cpass) {
            $("#error-cpass").text('Please enter the same password as above.');
            error = true;
        } else {
            $("#error-cpass").text('');
            $("#pass").removeClass("box_error");
            $("#cpass").removeClass("box_error");
        }
    }
    // animation
    if (!error) {
        if (animation) return false;
        animation = true;

        current_slide = $(this).parent().parent();
        next_slide = $(this).parent().parent().next();

        $("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");

        next_slide.show();
        current_slide.animate({
            opacity: 0
        }, {
            step: function(now, mx) {
                scale = 1 - (1 - now) * 0.2;
                left = (now * 50) + "%";
                opacity = 1 - now;
                current_slide.css({
                    'transform': 'scale(' + scale + ')'
                });
                next_slide.css({
                    'left': left,
                    'opacity': opacity
                });
            },
            duration: 800,
            complete: function() {
                current_slide.hide();
                animation = false;
            },
            easing: 'easeInOutBack'
        });
    }
});
// second step validation
$(".ss_next_btn").click(function() {
    // twitter
    if ($("#twitter").val() == '') {
        $("#error-twitter").text('twitter link is required.');
        $("#twitter").addClass("box_error");
        error = true;
    } else {
        var twitterReg = /https?:\/\/twitter\.com\/(#!\/)?[a-z0-9_]+$/;
        if (!twitterReg.test($("#twitter").val())) {
            $("#error-twitter").text('Twitter link is not valid.');
            error = true;
        } else {
            $("#error-twitter").text('');
            $("#twitter").removeClass("box_error");
        }
    }
    // facebook
    if ($("#facebook").val() == '') {
        $("#error-facebook").text('Facebook link is required.');
        $("#facebook").addClass("box_error");
        error = true;
    } else {
        var facebookReg = /^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/;
        if (!facebookReg.test($("#facebook").val())) {
            $("#error-facebook").text('Facebook link is not valid.');
            error = true;
            $("#facebook").addClass("box_error");
        } else {
            $("#error-facebook").text('');
        }
    }
    // linkedin
    if ($("#linkedin").val() == '') {
        $("#error-linkedin").text('Linkedin link is required.');
        $("#linkedin").addClass("box_error");
        error = true;
    } else {
        var linkedinReg = /(ftp|http|https):\/\/?(?:www\.)?linkedin.com(\w+:{0,1}\w*@)?(\S+)(:([0-9])+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
        if (!linkedinReg.test($("#linkedin").val())) {
            $("#error-linkedin").text('Linkedin link is not valid.');
            error = true;
        } else {
            $("#error-linkedin").text('');
            $("#linkedin").removeClass("box_error");
        }
    }

    if (!error) {
        if (animation) return false;
        animation = true;

        current_slide = $(this).parent().parent();
        next_slide = $(this).parent().parent().next();

        $("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");

        next_slide.show();
        current_slide.animate({
            opacity: 0
        }, {
            step: function(now, mx) {
                scale = 1 - (1 - now) * 0.2;
                left = (now * 50) + "%";
                opacity = 1 - now;
                current_slide.css({
                    'transform': 'scale(' + scale + ')'
                });
                next_slide.css({
                    'left': left,
                    'opacity': opacity
                });
            },
            duration: 800,
            complete: function() {
                current_slide.hide();
                animation = false;
            },
            easing: 'easeInOutBack'
        });
    }

});

// third step validation
$(".ts_next_btn").click(function() {
    // first name
    if ($("#fname").val() == '') {
        $("#error-fname").text('Enter your First name.');
        $("#fname").addClass("box_error");
        error = true;
    } else {
        var fname = $("#fname").val();
        if (fname != fname) {
            $("#error-fname").text('First name is required.');
            error = true;
        } else {
            $("#error-fname").text('');
            error = false;
            $("#fname").removeClass("box_error");
        }
        if ((fname.length <= 2) || (fname.length > 20)) {
            $("#error-fname").text("User length must be between 2 and 20 Characters.");
            error = true;
        }
        if (!isNaN(fname)) {
            $("#error-fname").text("Only Characters are allowed.");
            error = true;
        } else {
            $("#fname").removeClass("box_error");
        }
    }
    // last name
    if ($("#lname").val() == '') {
        $("#error-lname").text('Enter your Last name.');
        $("#lname").addClass("box_error");
        error = true;
    } else {
        var lname = $("#lname").val();
        if (lname != lname) {
            $("#error-lname").text('Last name is required.');
            error = true;
        } else {
            $("#error-lname").text('');
            error = false;
        }
        if ((lname.length <= 2) || (lname.length > 20)) {
            $("#error-lname").text("User length must be between 2 and 20 Characters.");
            error = true;
        } 
        if (!isNaN(lname)) {
            $("#error-lname").text("Only Characters are allowed.");
            error = true;
        } else {
            $("#lname").removeClass("box_error");
        }
    }
    // phone
    if ($("#phone").val() == '') {
        $("#error-phone").text('Enter your Phone number.');
        $("#phone").addClass("box_error");
        error = true;
    } else {
        var phone = $("#phone").val();
        if (phone != phone) {
            $("#error-phone").text('Phone number is required.');
            error = true;
        } else {
            $("#error-phone").text('');
            error = false;
        }
        if (phone.length != 10) {
            $("#error-phone").text("Mobile number must be of 10 Digits only.");
            error = true;
        } else {
            $("#phone").removeClass("box_error");
        }
    }
    // address
    if ($("#address").val() == '') {
        $("#error-address").text('Enter your Address.');
        $("#address").addClass("box_error");
        error = true;
    } else {
        var address = $("#address").val();
        if (address != address) {
            $("#error-address").text('Address is required.');
            error = true;
        } else {
            $("#error-address").text('');
            $("#address").removeClass("box_error");
            error = false;
        }
    }

    if (!error) {
        if (animation) return false;
        animation = true;

        current_slide = $(this).parent().parent();
        next_slide = $(this).parent().parent().next();

        $("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");

        next_slide.show();
        current_slide.animate({
            opacity: 0
        }, {
            step: function(now, mx) {
                scale = 1 - (1 - now) * 0.2;
                left = (now * 50) + "%";
                opacity = 1 - now;
                current_slide.css({
                    'transform': 'scale(' + scale + ')'
                });
                next_slide.css({
                    'left': left,
                    'opacity': opacity
                });
            },
            duration: 800,
            complete: function() {
                current_slide.hide();
                animation = false;
            },
            easing: 'easeInOutBack'
        });
    }
});
// previous
$(".previous").click(function() {
    if (animation) return false;
    animation = true;

    current_slide = $(this).parent().parent();
    previous_slide = $(this).parent().parent().prev();

    $("#progress_header li").eq($(".multistep-box").index(current_slide)).removeClass("active");

    previous_slide.show();
    current_slide.animate({
        opacity: 0
    }, {
        step: function(now, mx) {
            scale = 0.8 + (1 - now) * 0.2;
            left = ((1 - now) * 50) + "%";
            opacity = 1 - now;
            current_slide.css({
                'left': left
            });
            previous_slide.css({
                'transform': 'scale(' + scale + ')',
                'opacity': opacity
            });
        },
        duration: 800,
        complete: function() {
            current_slide.hide();
            animation = false;
        },
        easing: 'easeInOutBack'
    });
});

$(".submit_btn").click(function() {
    if (!error){
        $(".main").addClass("form_submited");
    }
    return false;
})

 

Output:

how_to_validate_multi_step_form_using_jquery_output

Original article source at: https://websolutionstuff.com/

#jquery #validate #step 

Alayna  Rippin

Alayna Rippin

1597003200

Sum of elements of a Geometric Progression (GP) in a given range

Given a Geometric Progression series in arr[] and Q queries in the form of [L, R], where L is the left boundary of the range and R is the right boundary. The task is to find the sum of the Geometric Progression elements in the given range.

Note: The range is 1-indexed and** 1 ≤ L, R ≤ N**, where N is the size of arr.

Examples:

Input:_ arr[] = {2, 4, 8, 16, 32, 64, 128, 256}, Q = [[2, 4], [2, 6], [5, 8]] _

Output:

_28 _

_124 _

480

Explanation:

_Range 1: arr = {4, 8, 16}. Therefore sum = 28 _

_Range 2: arr = {4, 8, 16, 32, 64}. Therefore sum = 124 _

Range 3: arr = {32, 64, 128, 256}. Therefore sum = 480

Input:_ arr[] = {7, 7, 7, 7, 7, 7}, Q = [[1, 6], [2, 4], [3, 3]] _

Output:

42

_21 _

_7 _

Explanation:

Range 1: arr = {7, 7, 7, 7, 7, 7}. Therefore sum = 42

_Range 2: arr = {7, 7, 7}. Therefore sum = 21 _

Range 3: arr = {7}. Therefore sum = 7

Approach: Since the given sequence is an Geometric progression, the sum can be easily found out in two steps efficiently:

  1. Get the first element of the range.
  2. If **d = 1, **then multiply **d*k **to it, else multiply the (dk – 1)/(d – 1) to it, where d is the common ratio of the GP and k is number of elements in the range.

For example:

Suppose a[i] be the first element of the range, d be the common ratio of GP and k be the number of elements in the given range.

Then the sum of the range would be

_= a[i] + a[i+1] + a[i+2] + …… + a[i+k-1] _

_= a[i] + (a[i] * d) + (a[i] * d * d) + …. + (a[i] * dk) _

_= a[i] * (1 + d + … + dk) _

= a[i] * (dk – 1)/(d – 1)

Below is the implementation of the above approach:

Python3

## Python program to

## find the sum of elements

## of an GP in the given range

## Function to find sum in the given range

**def** findSum(arr, n, left, right):

## Find the value of k

k **=** right **-** left **+** 1

## Find the common difference

d **=** arr[``1``] **//** arr[``0``]

## Find the sum

ans **=** arr[left **-** 1``]

**if** d **==** 1``:

ans **=** ans ***** d ***** k

**else**``:

ans **=** ans ***** (d ****** k **-** 1``) **//** (d **-**``1``)

**return** ans

## Driver code

**if** __name__ **==** '__main__'``:

arr **=** [ 2``, 4``, 8``, 16``, 32``, 64``, 128``, 256 ]

queries **=** 3

q **=** [[ 2``, 4 ], [ 2``, 6 ], [ 5``, 8 ]]

n **=** len``(arr)

**for** i **in** range``(queries):

**print**``(findSum(arr, n, q[i][``0``], q[i][``1``]))

Output:

28
124
480
  • Time complexity:_ O(Q) _
  • Space complexity:_ O(1)_

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

#arrays #mathematical #geometric progression #css #python

 iOS App Dev

iOS App Dev

1655889360

Element IOS: A Glossy Matrix Collaboration Client for IOS

Element iOS

Element iOS is an iOS Matrix client provided by Element. It is based on MatrixSDK. 

Beta testing

You can try last beta build by accessing our TestFlight Public Link. For questions and feedback about latest TestFlight build, please access the Element iOS Matrix room: #element-ios:matrix.org.

Build instructions

If you have already everything installed, opening the project workspace in Xcode should be as easy as:

$ xcodegen                  # Create the xcodeproj with all project source files
$ pod install               # Create the xcworkspace with all project dependencies
$ open Riot.xcworkspace     # Open Xcode

Else, you can visit our installation guide. This guide also offers more details and advanced usage like using MatrixSDK in its development version.

Contributing

If you want to contribute to Element iOS code or translations, go to the contribution guide.

Support

When you are experiencing an issue on Element iOS, please first search in GitHub issues and then in #element-ios:matrix.org. If after your research you still have a question, ask at #element-ios:matrix.org. Otherwise feel free to create a GitHub issue if you encounter a bug or a crash, by explaining clearly in detail what happened. You can also perform bug reporting (Rageshake) from the Element application by shaking your phone or going to the application settings. This is especially recommended when you encounter a crash.

Download Details:
Author: vector-im
Source Code: https://github.com/vector-im/element-ios
License: Apache-2.0 license

#swift #ios #mobileapp

anita maity

anita maity

1621172164

Circular Progress Bar Using Html CSS and Bootstrap

How to create an animated circular progress bar using only HTML CSS and BoostApp programming code. I have designed many more types of animated progress bars before but this design has been designed in a completely modern way.

Animated circular Progress Bar is a type of statistical design used in a variety of websites. It is mainly used to indicate the percentage of one’s qualification in a portfolio website or personal website. It is fully animated, that is, under normal conditions, it has zero percent then it will gradually reach the pre-determined percentage. Different colors have been used to denote percentages.

Demo

video: https://www.youtube.com/watch?v=7PThu9_EP40

#circular progress bar #progress bar #animated circular progress bar #skill #progress

Rahim Makhani

Rahim Makhani

1625717787

Reach out to more customers: get a progressive web app

A Progressive Web App is a type of application software that is delivered through the web. It is built using standard web technologies HTML, CSS, and JavaScript. It is expected to work on any platform that uses a standards-compliant browser, including desktop and mobile.

It is also known as a type of web page or web server. With the help of these PWA web pages, you can reach more customers for a business by marketing and promoting your business through web pages. You can also gain more customers by developing PWA by hiring a progressive web app development company. Nevina Infotech is a company that can help you to build your progressive web app with the help of its enthusiastic developers.

#progressive web app development company #progressive web app developers #progressive web app platform #progressive web app development services #progressive web app development