ooc | Object-Oriented Programming With ANSI-C | Functional Programming library

I am reading the online book Object-Oriented Programming with ANSCI-C

Page 6 shows an implementation of a set. There is an add() function that takes two parameters: a set and an element. The element is added to the set. The implementation uses an array of pointers:

Using boost::interprocess message queue, I ran into a problem with removing the queue, was hoping someone could provide an explanation for the behavior, or correct my misunderstanding. I'm on a Linux RHEL7 box. I have two processes, one that creates and feeds the queue, and the other one that opens the message queue and reads from it. For clarity, the initial process is started first, before the second process that does the reading/removing msgs from queue. The one that creates, is create_only_t. I want it to fail if it already exists. The creation of the first queue always fails however. The specific exception it throws is File exists.

When switched to an open_or_create_t queue, it works fine. I took this information as I wasn't cleaning it up properly, so I made sure I was trying to remove the queue before I tried to create it, as well as after the process finished sending all messages. I would log if the remove was successful. One of my assumptions is that if the remove returns true it means it successfully removed the queue. The boost docs for remove reads: "Removes the message queue from the system. Returns false on error.", I wasn't sure if maybe a true just means that it had a successful 'attempt' at removing it. Upon further looking at another Boost Inprocess pdf it explains:

The remove operation might fail returning false if the shared memory does not exist, the file is open or the file is still memory mapped by other processes

Either case, I feel like one would expect the queue to be removed if it always returns true, which is currently my case. Still when trying to do a 'create_t' message queue it will continue to fail, but 'open_or_create_t' still works.

I had a hard time understanding the behavior, so I also tried to remove the message queue twice in a row before trying to initialize a create_t queue to see if the second one would fail/return false, however both returned true (which was not what I expected based on what the documentation said). The first remove should it be successful means the second one should fail as there should no longer be a message queue that exists anymore.

I've attached a snippet of my create process code. And I'll note, that this error happens without the "open process" being run.

Maybe I'm missing something obvious, thank you in advance.

Trying this now for a while and I have lost my knowledge...

How can I match any string pattern "OOC"? Starting or ending with a space or non-alphanumerical charachter?

I have a data.csv file as:

I am a newbie at programming and molecular dynamic simulations. I am using LAMMPS to simulate a physical vapor deposition (PVD) process and to determine the interactions between atoms in different timesteps.

After I perform a molecular dynamics simulation, LAMMPS provides me an output bonds file that contains records of every individual atom( as atom ID), their types (numbers reciprocating to particular elements), and information of other atoms that are bonded with those particular atoms. A typical bonds file looks like this.

I aim to sort atoms according to their types (like Group1: Oxygen-Hydrogen-Hydrogen) in three groups by considering their bonding information from bond output file and count the number of groups for each timestep. I used pandas and created a dataframe for each timestep.

Hello, I'm trying to debug the Java Script function that can be found in snippet below.

Function purpose:

• Add search capability in several table columns by adding a text field above each column name.
• The function is meant to filter all table rows that are not containing all user's input string in each column.

Can't figure out why my table search function is not working properly. Please run snippet below to mimic the problem.

so I have a query and I'm running it on the worst case scenario and it's taking 10-12 minutes. if I remove the time check on the where query it goes down to 20-30 seconds so I was wondering how to optimize it?

I tried adding index on the conversion of the timestamp to time but it didn't really help... the rs tables (register_status) has over 70 million rows, register_date around 280k and the cp one less than 1k.

The idea of the query is getting all the results of CP grouped by status over a period of dates, included in a time range. And that's the worst case scenario, so that's the first date in the database and if the user select the whole day as time range. Query is the following:

We have SAP BO 4.2 installed in house, and I've been told that REST is not turned on. I've written several successful .Net apps using the SDK to connect to and run against our production SAP box, and now I'm trying to write a Java app to do the same, as the Java SDK exposes more (and required) functionality.

I can't seem to get my Eclipse/Java/project environment set up properly to even start coding.

Windows 10, 64-bit

Eclipse version: 2019-03 (4.11.0)

Java version:
openjdk version "12.0.2" 2019-07-16
OpenJDK Runtime Environment (build 12.0.2+10)
OpenJDK 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing)

I created a new "Java EE" -> "Application Client Project".

I'm not able to get the following code to "Run As Application":

I have added a solution to the problem in an answer below. Also the title has been updated from the old to a more fitting one, since it seems that all characters from 128 to 255 seem to be causing an issue (the extended ASCII codes, as seen here: Ascii table).

The problem seems to have gone away after updating PHP to 7.1.30 (lower version might work as well). Worth noting is that my fix below instead caused problematic output in the newer version: Also using the helper function in the answer clearly causes problems, as it generates gibberish: