/wsr/ - Worksafe Requests

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Anonymous Thu 19 Apr 03:31:00 2018 No.493920 View Reply Original Report Download thread

Quoted By: >>493972

Hi guys, posting for help with a C++ assignment.

I'm seriously busting my brains, doubly linked circular lists make sense to me conceptually, I know I have to re-point nodes to the next and previous when deleting etc. However I'm trying to write my destructor:

Find head by returning tail->next
Point tail->next to the head->next and head->next->prev to head->prev.
Delete head
Repeat until is_empty.

I can't make this work in code.

https://pastebin.com/2ve46e2Z

pic unrelated

Anonymous

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Anonymous Thu 19 Apr 2018 07:09:21 No.493972 Report

Quoted By: >>493997 >>494094

>>493920
>Circular_DLList::~Circular_DLList(){
>> for (Circular_DLList *p; !is_empty(); ) {
>>> DLLNode head = new DLLNode(tail->next);
>>> tail->next = head->next;
>>> head.next->prev = tail;
>>> delete head;
>> }
>}

>> for (Circular_DLList *p;
Why are you declaring a pointer p to a Circular_DLList in the for loop? But never use it?

>>> DLLNode head = new DLLNode(tail->next);
Why the hell are you allocating a new DLLNode? and it's not even a pointer to a DLLNode so it shouldn't even compile. Forget absolutely everything you know about java and NEVER remember any of it again.

Just start at the head and delete the nodes until you get to the tail. Then do a final delete of the tail.

Circular_DLList::~Circular_DLList() {
DLLNode * head = tail->next;
while(head != tail) {
DLLNode * p = head;
head=head->next;
delete p;
}
delete head; // deletes tail
}

Anonymous

Anonymous Thu 19 Apr 2018 09:10:28 No.493997 Report

Quoted By:

>>493972
It's interesting that you bring up Java, because in Java, C#, Python, etc. all the code OP's struggling with would be replaced with {}.

Anonymous

Anonymous Thu 19 Apr 2018 13:11:49 No.494094 Report

Quoted By: >>494096

>>493972
Circular_DLList::~Circular_DLList()
{
for (Circular_DLList *p; !is_empty(); ) {
DLLNode *head = tail->next;
tail->next = head->next;
head->next->prev = tail;
delete head;
}
}

This is what I ended up with. How's she look? Thanks for the help, it seems to match yours. :)

Anonymous

Anonymous Thu 19 Apr 2018 13:21:42 No.494096 Report

Quoted By:

>>494094
> tail->next = head->next
You don't need to fix up the pointers because you're deleting the whole structure anyway. Just remember to save a pointer to the next node before you delete the current one.

If you were into fixing the pointers and repairing the list, you'd probably do it in a separate remove(DLLNode *node), so you didn't have to repeat yourself, and the destructor for Circular_DLLlist could just be
> while(!is_empty()){remove (head);}

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PS4 reveal trailer music

Anonymous Thu 19 Apr 13:12:47 2018 No.494095 View Reply Original Report Download thread

Quoted By:

does anyone know what's the music used in PS4's reveal trailer? Been looking for it for ages, and even heard it used in VOX's material on Space food or something, but still can't find the whole track. this is the teaser im talking about: youtube CxWwxbVGbpg

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shop a sax

Anonymous Thu 19 Apr 13:09:58 2018 No.494093 View Reply Original Report Download thread

Quoted By:

can someone shop a saxophone on him like he's playing on it?
don't mind the hole next to him

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Anonymous Thu 19 Apr 05:55:35 2018 No.493959 View Reply Original Report Download thread

Quoted By: >>493973

hello! i have a bit of a challenge for you :) could you please morph Engels or Mao into a chicken???

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Anonymous Thu 19 Apr 11:45:29 2018 No.494065 View Reply Original Report Download thread

Quoted By: >>494082

Guys please help, someone from Freelancing is making an Android app for me.
It's mainly a painting app.

I don't know why but the Eyedropper tool isn't working corectly.
When I zoom in 4x, it doesn't track the pixel color on the picture, even with simple and vibrant colors.

Eyedropper is the first icon. Click it, now you can drag or touch finger on the photo, while doing so you can see that the Brush icon changes color wherever you touch. But this doesn't work or registers the wrong color.

https://mega.nz/#!YUxglYqT!a5V8aFEHIPVMDdefNddkr3Fet1lMRmPPe8q4x7N9Vsk

What could this be? What to tell my developer?

Anonymous

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Anonymous Thu 19 Apr 2018 11:56:37 No.494073 Report

Quoted By:

Anyone willing?
You can use this picture

Anonymous

Anonymous Thu 19 Apr 2018 12:18:30 No.494082 Report

Quoted By: >>494084

>>494065
Explain to your developer what the expected behavior is, what's actually happening, and what device you're using. If you can craft a test image that makes the faulty behavior very obvious, that's even better.

Anonymous

Anonymous Thu 19 Apr 2018 12:27:16 No.494084 Report

Quoted By: >>494087

>>494082
The dev is backing down claiming there is a problem with my phone even though some of my friends are having the same issue. He also showed me a video of him testing the eyedropper and it was working fine.
So he's saying that he will not fix it.
I've showed him a screen recording of my problem, although the eyedroper doesn t have a pointer, so he can t see where I'm touching. So I guess I have to film myself with a camera but I think he understands

Anonymous

Anonymous Thu 19 Apr 2018 12:37:19 No.494087 Report

Quoted By: >>494091

>>494084
Can you post your request to the developer, verbatim except for names, so I can see where your request is lacking? I understand that some people can be unprofessional or stubborn, but maybe there's something you aren't mentioning that would convince him to re-assess the app.

Anonymous

Anonymous Thu 19 Apr 2018 13:01:11 No.494091 Report

Quoted By:

>>494087
I talked a lot with this dev
Since his English is not good I made sure he understands what I need. I showed him video of the paint Eyedropper tool

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Polysics

Anonymous Thu 19 Apr 10:55:32 2018 No.494036 View Reply Original Report Download thread

Quoted By:

>discover the existence of Polysics
>megusta
>want Polysics discography or best of album
>poorfag
>search torrents
>no seeds for any of them
>not even one
>search for DDL links
>dead for years
>beingthatlate.jpg
>can't get even one fucking album
>time to invoke /wsr/

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Anonymous Thu 19 Apr 12:46:32 2018 No.494089 View Reply Original Report Download thread

Quoted By:

How do you put music in Videos. Like these gondola videos? How do they do that?

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Anonymous Thu 19 Apr 12:40:28 2018 No.494088 View Reply Original Report Download thread

Quoted By:

Does anyone know the source for this at all? Thanks

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Fluid dynamics

Anonymous Thu 19 Apr 12:33:14 2018 No.494086 View Reply Original Report Download thread

Quoted By:

So bros I need help with fluid dynamics you might know something about it.
Im writing a report on the effects of pressure on the volumetric flow rates of non-newtonian fluids
However I need to calculate the Reynolds number to be able to calculate the head loss in the pipe due to friction.
But the Reynolds number requires the kinematic or absolute viscosity which both change in a non-newtonian fluid dependant on shear rate.
I have no idea what to do pls help

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Anonymous Thu 19 Apr 11:33:02 2018 No.494053 View Reply Original Report Download thread

Quoted By: >>494078

can somebody photoshop the ui elements from these screenshots away? i do not have access to photoshop and i'd really like to use these images as wallpapers.

i would prefer if you keep these images at 4k.

4 posts and 4 images omitted

Anonymous

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Anonymous Thu 19 Apr 2018 11:38:46 No.494058 Report

Quoted By:

i think these screenshots are very aesthetic and make for excellent wallpapers.

Anonymous

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Anonymous Thu 19 Apr 2018 11:41:08 No.494060 Report

Quoted By:

Anonymous

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Anonymous Thu 19 Apr 2018 11:42:42 No.494061 Report

Quoted By:

this is the last one.

Anonymous

Anonymous Thu 19 Apr 2018 12:07:44 No.494078 Report

Quoted By:

>>494053
The Game

Anonymous

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Anonymous Thu 19 Apr 2018 12:30:01 No.494085 Report

Quoted By:

i was able to work with some of these, but i think that content aware fill could do much better job (especially with more complex images).

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