How to get an invitation for Google Foobar:

Open google.com/ncr (Original page) and search for "Arraylist Java"
Copy the URL of the search result page and repeatedly open a new tab with that link (You can press ctrl and spam 't' and 'v')
After you open the necessary number of tabs (about 15-20, not sure), you'll get a black bar saying you're invited.

Enjoy!

Actual quote from professor regarding homework that has us recreate the ArrayList: "If you import ArrayList I will punch you in the Goddamn mouth!"

This semester ought to be fun

Dear javascript, if your array is treated like an arraylist THEN CALL IT A FUCKING ARRAYLIST

Sincerely, a java developer

I have become so lazy that I write things like
int reservations = getReservations()
and then use the IDEs quickfix to change int to Arraylist<Reservation>
Saves me roughly 15 characters but its always worth it :D

Used hashmap instead of arraylist for 13000+ entries and fetched it from hashmap. Earlier used to take 1500ms to execute and now only 500ms.. First time, optimization of code for which i can see the difference in real world.. Its a good feeling.

Life is like an ArrayList, starts at 0 but hasn't got a defined size.

The most used line by a java dev:

xyz = new ArrayList<>();

people always complain about semicolons but I don't think I've ever had a semicolon issue cuz of ide's. but I'm plagued by tons of other stupid mistakes, like forgetting to initialize my ArrayList<>'s in java from null to empty..

after beginning to learn numpy , i believe these packages were really created by some clown of a circus xD.
Everything is sooooo entertaining!!!

i learned java 3 years ago, but today if i had to crap out some crazy java or c++ expert , i would tell him about numpy's arrays...
Like , "hey dude python has this cool data structure in the numpy library called arrays, which can hold any datatypes in a kind of arraylist like fashion, and you can convert them from 1 dimensional to 1000 dimensional in just 1 line , and also do you know we can select any column with just array[position]? and even this position does not needs to be an integer, you can use a list , like array[[1,2,3]] will give you elements at array[1],array[2],array[3], and...."
wait, why is my friend dead ? xD
HAhahahaha

I bring you all another gem from my computer science course, this time from my OOP class.

The first assignment we made for this class was a simple CLI shop, where you would have basically three main classes:

- A Product class that you extend to create different types of products.
- A Cart class that manages a list of products (basically an ArrayList<Product>) and has some useful methods
- A CLI class to display a simple interface to the user and call methods on a Cart.

Basic OOP stuff, so far so good.

Then for our second assignment the teacher asked us to make Cart a generic class, where you would say Cart<Bagel> and you would only be able to put bagels in it. This makes absolutely no fucking sense, this is not a good use case for generic types since

1) you would never limit your customer's cart to one type of product at compile time.
2) in Cart, you have to cast the generic type to Product to extract any information from the product, like when getting product prices to calculate the total price, so might as well use a fucking ArrayList<Product>

I'm just saying what he's asking us to do has (to our fictional shop's business logic) absolutely no advantage over subtyping.

Also, why the fuck teach generic constraints when you can just tell your students "just cast T to Product", right?

Like fucking hell, couldn't you spend like 10min to come up with a decent assignment that actually teaches generic types the right way? ffs

And just so no one can say "but wut simple assignment would you give to teach students generic types?", here's a simple and much, much better alternative: implementing your own ArrayList. Done. Can't get much better than that, it's a legit use case and teaches you the basics.

Sorry man, you're a great person, you really are, but you suck as a teacher.

Basically everything. Let me explain.

It's now.. okay what time is it? Ooh there's some dust on the clock, I wonder how do they form.. I guess I'll check Wikipedia. Page is loading, might as well scroll fb while waiting. Ooh a video on the home feed! Oh wait it's loading, I wonder what's on YouTube. Ugh, ads, let's just mute it and scroll devRant. Oh cool there's something called Google FooBar challenge, imma try searching Arraylist Java. Nice, lv1 done, let's take a break by getting a drink from the fridge.

*Walks back to room after drinking a sip of orange juice* hmm.. what time is it? Oh it's late, imma go to sleep!

*Shuts down everything and goes to bed* Maybe I'll just browse devRant before sleeping.. Ooh I have an idea for wk51!

Just solved a bug that was plaguing me for a week straight. Turns out I re-instantiated an Arraylist after adding all the elements to it. For no apparent reason. Face fucking palm

I thought I was doing all this cool stuff with Arraylist. Then I met hashmap

How many of you use the right data structures for the right situations?

As seasoned programmer and mentor Simon Allardice said: "I've met all sorts of programmers, but where the self-taught programmers fell short was knowing when to use the right data structure for the right situation. There are Arrays, ArrayLists, Sets, HashSets, singly linked Lists, doubly linked Lists, Stacks, Queues, Red-Black trees, Binary trees,.. and what the novice programmer does wrong is only use ArrayList for everything".

Most uni students don't have this problem though, for Data Structures is freshman year material. It's dry, complicated and a difficult to pass course, but it's crucial as a toolset for the programmer.

What's important is knowing what data structures are good in what situations and knowing their strengths and weaknesses. If you use an ArrayList to traverse and work with millions of records, it will be ten-fold as inefficient as using a Set. And so on, and so on.

A newly joined developer (who was supposed to be very senior) comes and asks me how to write a test cos for some reason the person didn't know how to mock.

In Java,
(same for any other implementation which has an interface)
Writes Arraylist list =.....
Instead of List list = Arraylist...

Deployed code (another engineer from another country helped to deploy since this new senior dev didn't have access yet.

But the new senior dev didn't update relevant files in production code which brought down the site for nearly an hour. Mistake aside, the first reaction from this new senior dev is 'WHY DIDN'T THE DEV THAT WAS HELPING DIDN'T DO THE FILE UPDATE?'

This was followed by some other complaints such as our branching stragies are wrong. When in fact the new senior dev made a mistake by just making assumptions on our git branching strategies and we already advised on correct process.

Out of all these, guess this is the best part. The senior dev never tested code locally! Just wrote code, unit test and send to QA and somehow the test passed through. I learnt this when I realised this dev... has not even set up the local environment yet.

I keep saying new but this Senior dev been around like 3 months! This person is in another team within our larger team but shares same code base. I am puzzled how do you not set up your environment for 3 months. Don't you ask for help if you are stuck? I am pretty sure the env is still not setup.

Am I over reacting or is this one disgusting developer who doesn't even qualify for an intern let alone a senior dev? It's so revolting I can't even bring myself to offer help.

So, I need to search for a new job again. The thing killed my project.

15 years of Java experience in my resume, I look a like a sterotypical 35 years old programmer, I’m applying for expert roles. But every remote technical interview starts with:
- what is the difference between ArrayList and LinkedList?
- what is a hash map?
The hardest part is to keep smiling to the camera, pretending I don’t have the answer memorized by repeating it for the last 15 years of interviewing, and not rolling my eyes.
And before you ask, I do know what garbage collector is.

Having a static class in C# with 20 variables of generic type: ArrayList with zero documentation to know type of array content 😒

You know what's better than a Bucket Object that wraps an arraylist?

A BucketBucket Object which wraps an array of buckets which each wraps an ArrayList.

FML

Sometimes in our personal projects we write crazy commit messages. I'll post mine because its a weekend and I hope someone has a well deserved start. Feel free to post yours, regex out your username, time and hash and paste chronologically. ISSA THREAD MY DUDES AND DUDETTES
--
Initialization of NDM in Kotlin
Small changes, wiping drive
Small changes, wiping drive
Lottie, Backdrop contrast and logging in implementation
Added Lotties, added Link variable to Database Manifest
Fixed menu engine, added Smart adapter, indexing, Extra menus on home and Calendar
b4 work
Added branch and few changes
really before work
Merge remote-tracking branch 'origin/master'
really before work 4 sho
Refined Search response
Added Swipe to menus and nested tabs
Added custom tab library
tabs and shh
MORE TIME WASTED ON just 3 files
api and rx
New models new handlers, new static leaky objects xd, a few icons
minor changes
minor changesqwqaweqweweqwe
db db dbbb
Added Reading display and delete function
tryin to add web socket...fail
tryin to add web socket...success
New robust content handler, linked to a web socket. :) happy data-ring lol
A lot of changes, no time to explain
minor fixes ehehhe
Added args and content builder to content id
Converted some fragments into NDMListFragments
dsa
MAjor BiG ChANgEs added Listable interface added refresh and online cache added many stuff
MAjor mAjOr BiG ChANgEs added multiClick block added in-fragment Menu (and handling) added in-fragment list irem click handling
Unformatted some code, added midi handler, new menus, added manifest
Update and Insert (upsert) extension to Listable ArrayList
Test for hymnbook offline changing
Changed menuId from int to key string :) added refresh ...global... :(
Added Scale Gesture Listener
Changed Font and size of titlebar, text selection arg. NEW NEW Readings layout.
minor fix on duplicate readings
added isUserDatabase attribute to hymn database file added markwon to stanza views
Home changes :)
Modular hymn Editing
Home changes :) part 2
Home changes :) part 3
Unified Stanza view
Perfected stanza sharing
Added Summernote!!
minor changes
Another change but from source tree :)))
Added Span Saving
Added Working Quick Access
Added a caption system, well text captions only
Added Stanza view modes...quite stable though
From work changes
JUST a [ush
Touch horizontal needs fix
Return api heruko
Added bible index
Added new settings file
Added settings and new icons
Minor changes to settings
Restored ping
Toggles and Pickers in settings
Added Section Title
Added Publishing Access Panel
Added Some new color changes on restart. When am I going to be tired of adding files :)
Before the confession
Theme Adaptation to views
Before Realm DB
Theme Activity :)
Changes to theme Activity
Changes to theme Activity part 2 mini
Some laptop changes, so you wont know what changed :)
Images...
Rush ourd
Added palette from images
Added lastModified filter
Problem with cache response
works work
Some Improvements, changed calendar recycle view
Tonic Sol-fa Screen Added
Merge Pull
Yes colors
Before leasing out to testers
Working but unformated table
Added Seperators but we have a glithchchchc
Tonic sol-fa nice, dots left, and some extras :)))
Just a nice commit on a good friday.
Just a quickie
I dont know what im committing...

An undefined ArrayList coupled with NullPointerExceptions because of it really know how to raise your blood pressure up.

Spent almost 1 hour trying to figure out why and all I needed to do was look a couple lines above.

But I guess that's what 4am development is all about

So Sonar (Java code style checker) is telling me to return immediately instead of first assigning the results to a variable:
ArrayList<string> strings = ...

{Some long running logic that populates the list}

String x = String.join(strings);
return x;

Declaring x is bad apparently... but I disagree...

Am I not understanding something here?

The upside out this is you can breakpoint it and well you meet want to add additional logic later while you find a bug while debugging...

I guess it would be noticeably slower but a few seconds... If I were to call it 1 billion times?

A few years ago and today very shameful: Griefing Minecraft servers with an own "Griefer-Class". The class was completly enclosed into a simple ArrayList ( with {{ }} ) to hide it in JD-Gui (decompiler many are using) and had a own remote client that could send own as well as server commands via kinda like a telnet connection.

That were times... 😏

Is there a simple CPP equivalent to a tree node in Java that has a parent and a arraylist of children? Or will I have to write out a 500+ line class to get the same functionality? 🤔

Modern computer technology seems, to give an enormous edge to arrays. Elements of an array can be shifted and copied at insane speeds. As a result arrays and ArrayList will, in most practical situations, outperform LinkedList on inserts and deletes, often dramatically. In other words, ArrayList will beat LinkedList at its own game.

- Copied as is from a stackoverflow answer. The last sentence is savage.

Gson is an excellent library every Java/Android developer should know. You can easily parse a Json or XML network response into a POJO class and get ready to go. But the guys who started the project I currently support found a better, smarter, slicker way to parse network responses into memory:

ArrayList<ArrayList<HashMap<String, String>>>

I would love to meet the genius who came up with this idea. I mean, you can parse absolutely any API response without even having to define stupid Java classes or importing libraries! And also you can reutilize the same scheme for literally all Java projects that handle API responses! Wonderful