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Introduction to jQuery extend

The jQuery extend() method used to merge the contents of two or more objects into the first object. The jQuery extend() method is a built-in method. Sometimes we need to merge the contents of two or more objects into single object or target object itself, so jQuery provides extend() method for this purpose, always the first object is the target object here.

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Syntax:

jQuery.extend( [ deep ], target, object1 [, object N ] );

Parameters:

deep – This is an optional Boolean type parameter, that specifies the merge to become recursive for true value. It does not support false value.

target – This is the first object which is to be extend by extending the new properties from the one or more additional passed objects.

Object 1 – This is an additional object whose properties are to be extend into the first object.

Object N – This is an Nth additional object whose properties are to be extend into the first object.

Return value – The return value of this method is an extended or merged object.

Note: The null or undefined parameters are ignore in the extend() method. If only one parameter is passed to the extend() method then the target object is omitted and the jQuery object itself consider as the target, by which we can add the new functions to the jQuery namespace. Now as we know that the first parameter or the target object is modify and return by extend() method, but if we do not want to modify the original object, then we can pass the empty object as the target object for example as “$.extend({}, dict1, dict2)”.

Working of the jQuery extend() Method

The extend() method accepts two or more objects as parameters, the accepted objects are merge first based on the properties they have, and then the merge result store into the first object. The extend() method always take the first object as the target object.

Examples for the jQuery extend() Method

Example of jQuery extend() method for merging object2 into object1. Next, we write the HTML code to understand the jQuery extend() method more clearly with the following example, where the extend() method is used to merging Marks2 into Marks1, as below –

Example #1

Code:

Output:

As in the above program, the two objects Marks1 and Marks2 are created for subjects with some students marks in their respective subjects. Next in the program both of the marks are merge and store into the marks1 by using the extend() method and we can see in the output that for the same student of a common subject the marks are updated from the additional object that is marks2.

Example of jQuery extend() method for merging object2 into object1 recursively and merging object1 and object2 without modifying the object1 –

Next, we write the HTML code to understand the jQuery extend() method, where the extend() method is used to merging Marks2 into Marks1 recursively and without modifying the marks1, as below –

Example #2

Code:

$(document).ready(function(){ var marks1 = { Maths: { S1 : 89, S3:90 }, Social: { S1 : 78, S2: 56, S3:75 }, Science: { S1 : 60, S3:77} }; var marks2 = { Science: { S1 : 60, S2: 47, s4: 67 }, English: { S1 : 66, S3:89 } }; $( “#m1” ).append( JSON.stringify( marks1 )); $( “#m2” ).append( JSON.stringify( marks2 )); $.extend( true, marks1, marks2 ); $( “#m3” ).append( JSON.stringify( marks1 )); $( “#m4” ).append( JSON.stringify( marks1 )); }); }); $(document).ready(function(){ var marks1 = { Maths: { S1 : 89, S2: 47, S3:90 }, Social: { S1 : 78, S2: 56, S3:75 }, Science: { S1 : 60, S2: 50, S3:77} }; var marks2 = { Science: { S1 : 60, S2: 47, S3:78 }, English: { S1 : 66, S2: 68, S3:89 } }; $( “#m1” ).append( JSON.stringify( marks1 )); $( “#m2” ).append( JSON.stringify( marks2 )); $.extend( {}, marks1, marks2 ); $( “#m3” ).append( JSON.stringify( marks1 )); $( “#m4” ).append( JSON.stringify( marks1 )); }); });

Output:

Conclusion

The jQuery extend() method is a built-in method in jQuery, which is used to merge two or more objects into the first object.

China Launched Two More Massive Type 055 Warships

The Type 055’s vast combat capability and formidable physical presence makes an obvious choice to fly the Chinese flag around the seven seas. There’s a smaller Type 052D destroyer behind it (and just over half the size of the Type 055). by78

Launch

Each Type 055 destroyer (called a cruiser by the US Navy) displaces over 13,000 tons, and has the heaviest missile load of any post Cold War warship.

On July 3rd, China launched two gigantic “Renhai” Type 055 guided missile destroyers (DDG). Along with one 25,000 ton Type 071 landing platform dock, another 13,000-14,000 ton Type 055 DDG launched this April, and one 7,500 ton Type 052D, China has launched nearly 80,000 tons of major surface combatant warships. With more destroyers and frigates under construction, it’s not impossible that China’s total launched warship displacement for 2023 could hit 100,000 tons.

Universal VLS

This fanmade CGI shows a variety of weapons that can launch from the Type 055’s VLS, 2.1 feet wide and 29.5 feet long, with nearly 60% more volume than the 2.3 feet wide and 25.9 feet long Mk 57 VLS, the largest US VLS system. This VLS can fire large Chinese surface to air, anti-ship and land-attack missiles like the HHQ-9, YJ-18 and CJ-10.

The ships were launched at the sprawling Dalian shipyard (also were the CV-17 aircraft carrier was built). Each Type 055 destroyer (classified as a cruiser by the US Navy due to its large size and arsenal) is 590 feet long and 65 feet wide; it is the world’s second largest Post-Cold War surface combatant, after the Zumwalt stealth destroyer. The ships’ primary combat systems are giant Type 342X radars and 112 vertical launch system (VLS) cells. The Chinese ‘universal’ VLS are 2.1 feet wide and 29.5 feet long, making them much larger than the 2.3 feet wide and 25.9 feet long Mk 57 VLS, the largest US VLS system. While the Ticonderoga cruisers and South Korean KDX-III destroyers have more VLS cells than the Type 055; the Type 055 can carry more ammunition mass in its larger VLS.

Type 055A

This fan made CGI of the Type 055A destroyer shows it with a railgun in place of the 130mm cannon found on the Type 055 (though the Type 055A may use a stealthier railgun turret).

Currently, each Type 055 has a 5 inch H/PJ-130 cannon. However, reported American analysis claims that China is working to have operational railguns, which use electromagnetic forces to launch Mach 7 shells, by 2025 (this date is prospective and highly dependent the success of the research program). Of China’s current warships, only the Type 055 has the necessary space for the electrical generators needed for power hungry railguns. That would likely be the next Renhai variant, the projected Type 055A destroyer, which would have surplus electrical generation through its Integrated Electric Propulsion System (IEPS).

Multiple Launches

With these two warships launched on July 3rd, China now has four Type 055s in the water, and the last to be commissioned by 2023. Another four Type 055s may be built, before construction begins on the Type 055A.

A Warship fit for a Superpower

The first Type 055 launched last year is likely to be commissioned late this year once the Jiangnan shipyard finishes installing electronics and completes basic crew training. Its three sister ships will probably enter service next year. The Type 055 provides China with a first-rate heavy warship that can deploy globally, whether to show the flag in foreign waters, participate in peacekeeping and joint military exercises, or project power well beyond China’s waters.

Will Bitcoin Take Two More Years To Breakthrough Us$70K Resistance

Bitcoin will rally from the latest crypto crash to hit a new record high of US$75,000 by this year-end!

Bitcoin has been around since 2009, and it’s had a wild ride. Some think that its price will continue to rise, while others believe that its bubble is about to burst. In this article, we’ll go over Bitcoin price prediction as stated by experts and give you our thoughts on the matter. However, this is only an estimate, meaning things could change drastically over the next few years. That being said, let’s take a closer look at Bitcoin’s future!

It’s been a rocky start to the year for Bitcoin, but experts still say it will hit US$100,000 and that it’s more a matter of when not if. Bitcoin’s price continued to hover near US$30,000 over the weekend and Monday, as both traditional financial markets and cryptocurrencies struggle to regain upward momentum. Investors are wrestling with concerns over rising inflation, geopolitical tensions, and the possibility of tighter monetary policy by the U.S. Federal Reserve. The crypto market has increasingly tracked the stock market in recent months, which makes it even more intertwined with global economic factors. Expert says Bitcoin will rally from the latest cryptocurrency crash to hit a new record high of US$75,000 by the end of this year.

The Largest Crypto Characteristics

As it stands, Bitcoin is seen as a risk asset, alongside equities, yet this could all change as the largest crypto’s characteristics haven’t altered.

With red-hot inflation set to continue within the coming months, the BTC price will be bolstered as investors seek to safeguard their purchasing power by moving away from cash and into the store of value investments.

To expert mind, there are three principal reasons why Bitcoin is regarded as a credible hedge against inflation. First, its limited supply. With just 21 million available, higher demand will drive prices up. Second, accessibility – it has value as an asset and is accepted by the market. And third, durability. Bitcoin will keep drawing more demand in the future.

It is also seen crypto’s other intrinsic values laid bare during the geopolitical issues over the last few weeks, such as being a viable decentralized, tamper-proof, unconfiscatable monetary system. As such, it is believed the case is now even stronger for Bitcoin and crypto. This is why it is expected Bitcoin to recover from the current crash to hit a new all-time high of US$75,000 by the end of 2023. Consequently, so-called ‘whales’ who hold 1,000 or more BTC will be rebuffing the concerns about the price dips and using them as buying opportunities.

As per research analysis, BTC could be along its way to hitting bottom and seeking assistance. Furthermore, BTC is close to the crucial Fibonacci level of 0.382, when Bitcoin dropped out throughout the 2014 and 2023 bearish cycles.

It was easy to predict a US$100,000 Bitcoin price late last year, coming off its latest all-time high in November. With Bitcoin’s big fall since then, the prediction game is even trickier. The most extreme crypto skeptics say Bitcoin will tank to as low as US$10,000 in 2023, but a middle ground might be to say the cryptocurrency can still climb to US$100,000 like many experts predicted late last year just on a slower timeline.

Golang Program To Find Intersection Of Two Sorted Arrays Using Two Pointer Approach

In this Go language article, we will write programs to find intersection of two arrays using two pointer approach. Intersection means similarity or most common and intersection of two arrays refers to the similar elements between two arrays.

Syntax func make ([] type, size, capacity)

The make function in go language is used to create an array/map it accepts the type of variable to be created, its size and capacity as arguments

func append(slice, element_1, element_2…, element_N) []T

The append function is used to add values to an array slice. It takes number of arguments. The first argument is the array to which we wish to add the values followed by the values to add. The function then returns the final slice of array containing all the values.

func range(variable)

The range function is used to iterate over any data type. To use this we first have to write the range keyword followed by the data type to which we want to iterate and as a result the loop will iterate till the last element of the variable.

sort.Ints()

This function belongs to the sort package and it is used to sort the slice/array containing integer values.

Using Two Pointer Approach in the if-else Conditionals

In this method, we will write a Golang program to find intersection of two arrays using if conditional which is used to compare the array elements and add the intersection points in the slice to print the Output.

Algorithm

Step1 − Import the fmt, main and sort package in the program where fmt helps in the formatting of the input and Output, the main ensures that the program should be an executable program and sort is used to sort the array

Step2 − Create a function named intersect with two input parameters array1 and the array2

Step3 − Sort the two arrays using the Ints method from the sort package

Step4 − Then, initialize variable i and j with 0, these variables refer to the index of array

Step5 − In this step, create an empty intersection slice to store the intersection points of the two arrays

Step6 − Iterate through the array1 and array2 and check if the elements are same, append the elements in the intersection slice and increment i and j variable.

Step7 − If the first array element is less than second array element increment I variable otherwise increment j variable

Step8 − Finally, return the slice to the external function created and in the main the Output will be received and printed on the console using Println function from the fmt package where ln means new line

Example

The following golang program explains how to find intersection of two arrays using two pointer approach in the if-else conditionals

package main import ( "fmt" "sort" ) func intersect(array1 []int, array2 []int) []int { sort.Ints(array1) sort.Ints(array2) i := 0 j := 0 var intersection []int for i < len(array1) && j < len(array2) { if array1[i] == array2[j] { intersection = append(intersection, array1[i]) i++ j++ } else if array1[i] < array2[j] { i++ } else { j++ } } return intersection } func main() { array1 := []int{1, 2, 2, 3} array2 := []int{2, 2} intersection_points := intersect(array1, array2) fmt.Println("The intersection points of the two arrays are:") fmt.Println(intersection_points) } Output The intersection points of the two arrays are: [2 2] Using Two Pointer Approach in Frequency Map

In this method, we will write a Golang program to find intersection of two arrays using frequency map will be used to count the occurrence of each element and store inside the map.

Algorithm

Step1 − Import the fmt and main package in the program where fmt helps in the formatting of the input and Output, the main ensures that the program should be an executable program.

Step2 − Create a function intersect with two inputs array1 and array2 and in that function create a frequency map using make function which is a built-in function in Go

Step3 − Iterate the array1 and count the occurrence of elements in the array and store in the map

Step4 − In this step, create an intersection slice to store the intersection points of the two arrays

Step5 − Next, iterate the array2 and check if the frequency of the elements is greater than 0

Step6 − If the condition is satisfied, append the values in the intersection slice and decrement the value

Step7 − Return the slice to the external function and in the main function print the Output using Println function from the fmt package where ln means new line

Example

The following golang program explains how to find intersection of two arrays using two pointer approach in frequency map

package main import "fmt" func intersect(array1 []int, array2 []int) []int { freq := make(map[int]int) for _, value := range array1 { freq[value]++ } var intersection []int for _, value := range array2 { intersection = append(intersection, value) freq[value]-- } } return intersection } func main() { array1 := []int{1, 2, 2, 3} array2 := []int{2, 2} intersection_point := intersect(array1, array2) fmt.Println("The intersection point of two arrays is:") fmt.Println(intersection_point) } Output The intersection point of two arrays is: [2 2] Conclusion

We compiled and executed the program of finding the intersection of two arrays using two pointer approach using two examples. In the first example we used conditional if-else statement and in the second example we used a frequency map to get the Output.

Protect All Of Your Accounts With Two

This post has been updated. It was first published on July 24, 2023.

Online security has never been more important, and if you think keeping all your accounts safe and secure is a big challenge, you’re definitely not alone.

But even if you feel comfortable with your passwords and you’ve managed to think of a different one for every account—an impressive feat to say the least—there are simple steps you can take to lay an extra layer of protection over your data. One of the most effective is enabling two-factor authentication (2FA) across all your apps and services.

How two-factor authentication works

The “two” is key in 2FA—it means that if someone wants to get into one of your accounts, they need not one, but two bits of information. A password counts as one, but it’s not enough. In addition to something you know—your password—two-factor authentication also requires “something you have.” This may be a code (sent to your phone via text message or from a code generator app) or a token you carry around with you, like a USB security key.

If you’re already dreading the idea and think this will make it too complicated to check your email every day, know that 2FA can be set to kick in only when you access your accounts from a new device. You can list your laptop and phone as “trusted devices” so they won’t prompt you to constantly look up codes or wait for texts when you log in from there. This can be comfortable but is also a great reason to protect your personal devices with strong PIN codes, passwords, and biometrics.

[Related: How to do two-factor authentication like a pro]

Two-factor authentication and two-step authentication are terms people often use interchangeably, and though they are very similar, they are not the same.

Two-step usually refers to two bits of similar information, like a passcode and a password, that you need to log into your account, and that you might get on the same device. Two-factor, meanwhile, typically requires two different devices or types of authentication, like a passcode and a fingerprint, making it much safer.

No, Google Authenticator won’t give you the winning Lotto numbers, but will help you protect any account. David Nield

You only need to look at the number of data breaches that regularly hit the headlines to know how easily your password and email address can leak into the public domain. You can always take mitigating steps if one of these events affects you but, as with everything, pre-emptive action is the best option.

With 2FA, anybody who tries to log into your accounts using your credentials will need to provide a second bit of information they don’t have, so they won’t be able to get in. If this happens, platforms usually notify you of an unsuccessful attempt to access your account, which could be useful if you ever wonder about whether you need to take further steps to protect your data.

Still, using two-factor authentication doesn’t mean your accounts are suddenly unhackable or that you can let your guard down. Text messages can be intercepted, phones can be stolen, and it’s important that you think of 2FA as one part of an effective security strategy rather than a failsafe lock.

Setting up this extra layer of security across all your accounts is easy and shouldn’t take you long at all. It’s definitely worth a few minutes for some extra peace of mind.

Activating two-factor authentication in all of your accounts

If you have time to play FarmVille, you have time to enable two-factor authentication. David Nield

Just about every major digital platform out there has a two-factor authentication option now. In some cases, you might actually get prompts to turn it on when you log in.

Google Microsoft Apple Facebook Twitter Instagram

For Instagram, open the app, go to your profile tab and tap the menu button (three horizontal lines, top right). There, go to Settings, then Security, and finally tap on Two-Factor Authentication. On this menu, you can set up authentication apps and verification codes sent via text message. You can also link your Instagram account to your WhatsApp account so you can receive your codes through there—ideal if you’re abroad and only running on WiFi. To enable this option, make sure you’ve already enabled 2FA via text messaging and that the phone number associated with your accounts is the same. After that, just turn on the toggle switch next to WhatsApp and you’re set.

Snapchat

In Snapchat, tap the cog icon from your profile tab and you’ll see the Two-Factor Authentication option. The platform only offers 2FA through text messaging and authenticator apps, so we’d recommend you enable both in case you need to access your account and have no phone reception.

TikTok

Open the TikTok app and on your profile tab, tap the menu button (three lines) on the top right corner of the screen, and go to Security and login. On the next screen, go to 2-Step Verification, and at the top, tap the Turn on button. TikTok has not elaborated a lot when it comes to the 2FA methods they currently offer their users, and at the moment of writing, you can only choose between getting a code sent to your email or to your phone via text message. Still, this is better than nothing, and hopefully, in the future, the platform will also add alternatives like prompts or authentication apps.

Tell your friends about securing their Snapchat account. And yes, you can use the doggy filter while you’re at it. David Nield

Dropbox WhatsApp

For WhatsApp, open the app and go to the main menu (three dots, top right). There, go to Account and then Two-step verification. At the bottom of the screen, tap Enable and follow the instructions. Meta’s messaging platform doesn’t give you too many options—the only 2FA method they offer is a secondary 6-digit code the app will require if you want to set it up on another device. Once you provide and confirm your code, WhatsApp will also ask you for an email address you’ll be able to use to recover your account in case you forget your code.

[Related: How to keep all of your accounts safe in a world where people want your data]

As you can see, two-factor authentication is just about everywhere and you should find the option fairly prominently displayed under any platform’s security options.

Where you won’t find two-factor authentication—at least not yet—is on media streaming services such as Spotify and Netflix. While we can’t speak for those services, it’s likely that the extra convenience of quickly switching between devices to listen to music or watch movies outweighs the security concerns of someone being able to binge-watch Stranger Things or listen to the complete works of Coldplay without your knowledge.

Where 2FA is available, switch it on, and pay attention to whatever backup login options there are (like security questions or a text message). After all, your accounts are only as strong as their weakest points.

Two Alums Make Time’s List Of Most Influential People Of 2023

Two Alums Make Time’s List of Most Influential People of 2023

Alexander is also a much lauded poet and essayist, while Zaslav is known for philanthropic work outside the industry. Photos courtesy of Andrew Harnik and Willy Sanjuan via AP Photo

Accolades

Two Alums Make Time’s List of Most Influential People of 2023 Mellon Foundation president Elizabeth Alexander (GRS’87) and media executive David Zaslav (LAW’85) among 100 artists, innovators, and leaders honored

They share the spotlight with Joe Biden and Volodymyr Zelensky, Tim Cook and Oprah Winfrey, Kris Jenner, and Vladimir Putin.

Two BU alums were named to this year’s Time Magazine 100 Most Influential People 2023, a list populated by many household names and more than a few less-famous influencers.

David Zaslav (LAW’85) is the chief executive officer and president of Warner Bros. Discovery, the vast multimedia conglomerate formed from the merger of WarnerMedia and Discovery Inc., which was completed in April and reported at more than $40 billion. Previously he was CEO of Discovery Inc., a position he assumed in 2006.

Elizabeth Alexander (GRS’87) is an award-winning poet, essayist, and biographer—and the president of the Mellon Foundation, which has an endowment reported at more than $8 billion.

Both were named to the Time list in the Titans category, which also includes Apple’s Cook and Winfrey, as well as Irish novelist Sally Rooney, European Central Bank president Christine LaGarde, and the Indian billionaire Gautam Adani.

In Time’s format, each of the honorees receives a short tribute from a colleague or peer. Zaslav’s was penned by Chip and Joanna Gaines, whose success as founders of the Magnolia lifestyle empire began with the show Fixer Upper on HGTV and now thrives on Discovery’s Magnolia Network.

“There’s something about the feeling David imparts when he believes in you, that has the ability to change circumstances,” they write. “To change the outcome. To change you and the world for the better. And now, as he takes on the role of CEO of Warner Bros. Discovery, that opportunity becomes even greater.”

Zaslav earned a bachelor’s degree at Binghamton University and went on to get a law degree from BU, practicing in New York before joining NBC Universal in 1989, overseeing cable and new media distribution of channels that include Bravo, Sci Fi, and the USA Network. He became CEO of Discovery in 2006, and notably oversaw its acquisition of Scripps Networks Interactive in 2023, which brought Food Network, HGTV, and others into the company. Now he’s tasked with leading Warner Brothers Discovery in the streaming media era.

Outside the corner office, he is known for charitable work, including on behalf of Jewish charities and Holocaust awareness efforts, where he has appeared with Steven Spielberg (Hon.’09) and the late Nobel laureate Elie Wiesel (Hon.’74), a longtime BU professor.

“David is a trailblazer but still grounded in what matters most,” the Gaineses write, noting his love for his family. “He’s a visionary who boldly predicts what’s ahead, but is the first to get behind other people’s dreams.”

“Elizabeth Alexander is many things,” Pulitzer Prize–winning playwright Lynn Nottage writes in Time. “She’s a poet, a philanthropist, an educator, and an intellectual, but most of all, she’s a visionary.”

Alexander received a bachelor’s degree from Yale and a master’s degree from BU, where she studied poetry under the late Derek Wolcott (Hon.’93), another BU professor and Nobel laureate, in the Creative Writing Program. She also earned a PhD from the University of Pennsylvania and has taught at Yale and Columbia. She has published six books of poetry and wrote “Praise Song for the Day” to recite at President Barack Obama’s 2009 inauguration. She has been a Pulitzer Prize finalist in poetry and memoir.

Her 16th book, published in April, is The Trayvon Generation (Grand Central, 2023), examining how race in America interacts with the arts and humanities, and the impact on young people like Trayvon Martin, Tamir Rice, and others whose names have recently been etched in tragedy.

She became president of the Mellon Foundation—the largest funder of the arts and the humanities in the United States—in 2023.

“Having a poetry insider at the head of a big grant-making institute does not mean, however, that poets have moved to the front of the line for funding. Alexander has a much more ambitious vision for the role that the arts and culture play in the formation of society,” Time wrote in 2023.

Among other things, Time noted, that means the Monuments Project, the biggest initiative in the Mellon Foundation’s history, a $250 million five-year plan to make America’s public monuments better reflect the complexity and diversity of our history.

“I am thrilled to receive this distinct honor from Time magazine and to be included in a cohort of such visionary artists, thinkers, and leaders,” Alexander says. “To be recognized for the power of the word and devotion to multicultural community and justice feels especially wonderful.”

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