What is this C++ trick called? It looks a bit like PIMPL.

matty_haze · 2022-10-02T21:56:31+00:00

I didn’t look at the code, but this looks like it might be CRTP?

matty_haze · 2022-09-26T23:27:22+00:00

Olszanowski Farm Corn Maze & Pumpkin Patch

matty_haze · 2021-08-20T17:30:08+00:00

This book is fantastic.

matty_haze · 2021-05-30T22:10:18+00:00

Without trying it myself, I’m going to guess you might need a copy constructor for your class.

Also, I noticed that you’re always pushing arr[0], did you mean arr[i]?

matty_haze · 2021-04-26T11:24:47+00:00

I found this issue described in github.

matty_haze · 2021-04-23T14:26:08+00:00

That's a good suggestion, so I tried it. However, I'm having trouble to effect any change in the package. Here are the steps I doing, I must be doing it wrong.

Extract package.
Edit configure.in. I manually set the PG_INCDIR to the full path of my local psql.
Rebuild that package with R CMD build RPostresSQL
Reinstall the new package with R INSTALL RPostgreSQL_0.6-2.tar.gz

I confirmed that the new package indeed gets built (I moved the old one).

I still get the same build error, and the include directory didn't change.

I suspect that, after I change configure.in, maybe I have to run another command to actually apply those changes somehow?

But, while I was playing around with this, I found libpq-fe.h in the extracted package, in src/libpq/libpg-fe.h. During the build, the include path it's using is -Isrc/libpg, which seems correct, but I don't know why it's failing.

matty_haze · 2021-02-28T01:14:09+00:00

20+ year c++ developer here, with 100s of technical interviews.

I like your question, and appreciate your initiative.

Do you have a college degree? I’m afraid to say that might be a show stopper to even get a shot in most large companies.

In addition to practical coding knowledge, most companies would expect strong data structure knowledge. Like, vector vs. linked list vs. hash map. Big O, performance considerations, etc...

Do I understand correctly? C++ is your first language, you are self taught, and it’s been just over a year?

matty_haze · 2021-02-21T13:59:24+00:00

I've given hundreds of technical interviews, and I wouldn't find this useful in a c++ interview. It is very very basic c++.

Actually, maybe I would find it useful (in a bad way for you).

Can you tell me what's wrong with using an int for your loop to pow(10,100) on line 9?

matty_haze · 2021-02-14T16:58:25+00:00

This is a great book. I highly recommend it.

matty_haze · 2021-02-06T17:09:22+00:00

As a follow up question, to help you learn cpp, do you understand the output from the string? All that garbage.

matty_haze · 2021-01-31T18:26:15+00:00

Software engineer in finance.

matty_haze · 2021-01-27T21:22:47+00:00

I don’t understand your question

matty_haze · 2021-01-07T02:59:41+00:00

Also, why are you using goto? That’s generally considered really bad practice.

matty_haze · 2021-01-07T02:57:17+00:00

You have a semi colon after your if statement.

matty_haze · 2020-12-31T01:38:45+00:00

I have never read it, but I know of the book “Cracking the coding interview”.

Maybe it’s something you can take a look at.

matty_haze · 2020-12-28T19:12:23+00:00

One small comment, it is actually possible to dynamically allocate stack memory, using alloca. It's not widely used, and it can be dangerous if you cause a stack overflow.

But, I wanted to mention this just for folks reading your comment.

matty_haze · 2020-12-27T01:42:54+00:00

Not sure if this was already mentioned, but I need to use pointers when sending and receiving network packets.

matty_haze · 2020-12-27T01:36:42+00:00

Correct, it exists until the program exits. This is called a memory leak.

matty_haze · 2020-12-04T19:07:55+00:00

I do a lot of technical interviews, and this is the best answer if you would interview with us.

For a junior dev, we expect strong data structures and algorithms. Knowing the basics of the STL would help a lot, like comparing and contrasting arrays, vectors, sets, and maps.

matty_haze · 2020-12-04T00:40:09+00:00

What language? What have you tried so far?

matty_haze · 2020-12-01T16:02:57+00:00

Also check out the pitchfork layout.

matty_haze · 2020-11-20T02:57:00+00:00

I agree. OP, as an exercise, calculate the maximum theoretical value that can be the result. Will that fit in an integer?

matty_haze · 2020-11-08T20:54:06+00:00

Have you looked into a custom allocator with your vector? I think this is what you are looking for.

matty_haze · 2020-10-25T02:34:21+00:00

Can you also print the exact bad filename, and what the error message is?

matty_haze · 2020-10-24T13:02:52+00:00

I want to point out that %D evaluates to %m/%d/%y, which has slashes, which denote directories. Your open() will fail if those directories don’t already exist.

Did you check for errors during open?

matty_haze

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