The various techniques used for maintaining stable program state in circumstances that, if not taken care of ("handled"), could cause serious issues, including logical bugs and abrupt execution termination.
5
votes
1answer
54 views
Circular doubly linked list with templates
I tried to write some code namely "Circular doubly linked list" and I would like to use templates to do this.
This is the first time I use templates and throws some exceptions.
I would like to know ...
5
votes
2answers
101 views
Find all words that can create a pyramid
I wanted to write something that would find all pyramid words within a supplied text file or list of strings. An example of a pyramid word is the word "deadheaded". It has one of the letter "h", two ...
3
votes
1answer
1k views
Are these try/catch blocks cluttering the code?
The following program reads a stream and creates a two dimensional std::vector.
I'm trying to find an elegant way to handle the errors and recover from them as ...
0
votes
1answer
57 views
PHP Error Class
I have coded a very simple error class that will allow me to display errors if they should happen. For example, if a file is missing or a database connection couldn't be established I would display a ...
4
votes
1answer
443 views
Verifying user accounts on SMTP servers
I've been writing a basic script to enumerate SMTP users (via a user dictionary) on poorly configured SMTP servers. In scripts like this, I usually see arguments handled as follows:
...
1
vote
3answers
79 views
Select a list from a 2D list, take the last item from its nearest non empty left neighbour and put it at its head
I've just got into Haskell a few days ago and I love it. I'm looking for some pointers and best practices on how to organise and write Haskell code specifically when it comes to managing errors, which ...
3
votes
1answer
103 views
Dual-language beginner math solver program in C++
I've written a program that solves questions of:
Addition
Finding the hypotenuse of a triangle
Checking if the triangle has a right-angle or not
I've also written it to be viewed in English or ...
3
votes
1answer
35 views
6
votes
2answers
62 views
Repeat an action for a set of elements until all succeed, or progression halts
Context
I'm trying to write a function that drops a list of tables from a database (e.g., tables A, B and C).
This function has the following type, it returns a list of booleans indicating whether ...
3
votes
1answer
108 views
Try again, and again, and again… but not too often because the potatoes won't grow
The delay sequence has been fixed so I can move to the next step which are the Retry and Breaker.
(Just ignore the console ...
5
votes
2answers
409 views
An attempt to make a linked list iterator “safe”
I was practicing my C++ routine and decided to code up this simple linked list data structure. Furthermore, I made an attempt to make the list iterator "safe" in the sense that it throws an exception ...
4
votes
1answer
19 views
Interpreting database values as times and integers
I am working through Chapter 10 of Haskell Programming from First Principles.
I've gotten the code to work, but I am uneasy about the fact that a few of my functions - namely, ...
3
votes
1answer
90 views
AngularJS recursive function call with $timeout
I have created a recursive function call in AngularJS and just wonder if is there a better way to solve this problem? The code works perfectly.
My code is the following:
...
2
votes
1answer
69 views
Concurrent/parallel ForEachAsync - proper handling of exceptions and cancellations
I've created an asynchronous parallel ForEach mechanism so I could enumerate an enumerable by N degrees of concurrency and process an action for each item. ...
1
vote
1answer
32 views
Prettifying PHP's Exception stacktraces
I have always disliked the way PHP printed stacktraces, coming from a Java world. So I decided to implement my own ExceptionFormatter, a class that will format ...
5
votes
1answer
64 views
X86 Legacy boot loader error trapping
The boot loader that I'm designing is just simply going to setup (A) Stack, (B) Segment registers (C) Load remainder of track for specified device. Conventionally, this could have been up to 4 floppy ...
1
vote
0answers
57 views
Django REST custom methods for generic views
I'm intern and work on a project where I develop DRF API that need to interact with mobile app written by my colleague with Ionic framework.
We are creating new user. My view method is following:
<...
2
votes
0answers
40 views
Waiting for all task to complete while catching exceptions early
I'm working on simulating a number of processing elements (nodes) which do some work in parallel and communicate by exchanging messages. The message exchange is not in the scope of this post, but it ...
4
votes
1answer
93 views
An object for passing a chain of errors in JavaScript
I want to pass errors in errors in order to know exactly the chain of causes, but without augmenting or even reading any stack until this becomes really necessary. And this is how I would achieve this:...
0
votes
0answers
70 views
Insert data into Aurora DB from Kinesis Stream using Amazon Web Services Lambda Function
I have a python AWS lambda function that takes JSON records, checks them to see if they have required keys, and then inserts into MySQL db. The function gets invoked whenever a new record comes into ...
1
vote
1answer
59 views
Handling errors in a Python UDP proxy [closed]
The following (stripped) program receives UDP packets on port 5000 and forwards them to port 5001. It may throw socket errors on startup (e.g.: if the port is already in use), but I am not too worried ...
4
votes
1answer
60 views
Validating attributes of a page in Adobe Experience Manager
I am reviewing the following code written by a fellow developer. I am not an java expert but IMHO i did not feel this is efficient use of exceptions — the reason I feel so is:
The below code throwing ...
1
vote
1answer
88 views
Job queue with threading
On many articles and blogs, I have read that exceptions should not decide flow of your code.
I have wrote the following code using one thread:
...
7
votes
3answers
134 views
Doing an ROP style bind for two functions on the same input in a pipeline
I am working on understanding Railway Oriented Programming (Scott Wlaschin style) in F#. In my example I want to create a pipeline which does some calculation, applies two different functions to the ...
3
votes
3answers
431 views
Lower level exception handling during enumeration
I've got pretty straight forward scenario. I've got a class called FileInformationExtractor and method GetFilesInformation that ...
0
votes
1answer
46 views
Handling user input - follow-up
Original code: Getting name from user, and handling any errors in C
I fixed the bugs. Is there anything else to consider?
...
1
vote
1answer
52 views
Getting name from user, and handling any errors in C
The primary purpose of this program is to practice catching if the user enters data that does not correspond to expected input. Note if the user enters their name as "123", this is valid as it can be ...
2
votes
4answers
140 views
General Retry Strategy #3 with TryResult
I wanted to use the Try helper from @DmitryNogin's General Retry Strategy #2 but each attempt to implement it revealed another thing that is missing.
In my review ...
4
votes
1answer
185 views
Reading lines of a file into a vector of strings
I have to read from a file and store the data inside an std::vector container. The procedure of opening the file, reading and writing onto the container are enclosed in a routine: readData.
Reading ...
1
vote
1answer
58 views
Make sure the user enters a valid floating-point number in C
I would like to know if this is a good way to make sure the user enters a valid number.
...
3
votes
1answer
124 views
General Retry Strategy #2
Previous version
Now supports async operations and cancellation.
Let’s say we copy some file using retry strategy (it might be blocked, etc.). App code comes bellow:
...
2
votes
0answers
47 views
Rust-like “Result” in C - nicer error handling
There are frequently things I miss when using C; one of them is a nice error-handling (exception-like) system. After trying Rust, I realized I could implement something similar in C itself. So here's ...
4
votes
3answers
143 views
General Retry Strategy
Let’s say we copy some file using retry strategy (it might be blocked, etc.):
...
1
vote
0answers
62 views
REST API returning NotFound (404) if record is not found in the database
I'm not really sure what the preferred way is to deal with records not found in the database. Is it better to write a Find method which returns ...
3
votes
1answer
59 views
Avoiding a call to CommandBarControl.Picture
Earlier today, I encountered an Access Violation error when opening the VBE for SolidWorks 2006, while Rubberduck VBA was initializing.
I traced the Access Violation back to an attempt to set the ...
1
vote
0answers
29 views
Functional-style Cocoa XML serializer and object mapper
I'm working on an XML-to-model-object serialization and deserialization library. There are three main design goals for the code:
It should parse XML into and serialize from Cocoa-native collection ...
3
votes
1answer
112 views
Class of file uploading to S3 using boto with multipart supported
I'm writing an app by Flask with a feature to upload large file to S3 and made a class to handle this.
I have some targets in writing code:
Code must be easy to understand and maintain. (Yes, ...
0
votes
2answers
280 views
Check existence of item in collection [closed]
Checking whether an item exist in a collection isn't straightforward in VBA, it requires error checking and during error handling we need to clear the error and also resume code to be able to ...
0
votes
1answer
53 views
SQL message logger run loop
I am learning Java by reading source code of other authors. This Java method handles communication with SQL database. While the code does work several things concern me. For instance the ...
6
votes
3answers
89 views
Parsing excel cells containing line feed characters
This is a direct follow up to Parsing cells containing Line Feed Characters.
Link to sanitized xls on dropbox if test data is needed
Essentially the reports I work with aren't bad -
The issue is ...
10
votes
5answers
2k views
Validation that also returns error messages
My Create, Update and Delete methods should return a ...
4
votes
1answer
41 views
Takes function and throws exception if passed function doesn't throw an exception
The code below is part of a toy test assertion library I've written.
I'm looking for feedback specifically on lines 4 - 9. I'd like to extract them from the ...
0
votes
0answers
36 views
ResponseEntity<Error> bad design
We have implemented this pojo to use in the org.springframework.http.ResponseEntity.
...
3
votes
1answer
60 views
Command sequence executor with error handling
I've recently learned that as a Java developer my methods throw exceptions way too often, even when the reason for throwing is related to a business rule, when returning an error code instead could ...
1
vote
1answer
42 views
Parsing latitude and longitude, using Try[T] to ignore errors
I wrote this question asking about how to implement my error handling while still maintaining functional code and based on 200_success's very interesting note on the spaces, I decided to ...
2
votes
2answers
34 views
Memoizing decorator with retries - now with backoff added! (Part 3)
A continuation of Memoizing decorator with retries, part 2, and related to http://codereview.stackexchange.com/a/133493/47529. I liked my decorator before, but especially in my original use case of a ...
2
votes
1answer
29 views
Stored procedure to swap account holders
I'm doing an exercise, and would like to know if what I'm doing is correct and follows the correct structure for rollback in case a transaction fails. I would like to know as well if my ...
3
votes
1answer
48 views
Elixir / Phoenix login controller, allowing multiple attempts
I have a login method in my controller. I would like to get rid of the imperative "thinking" and write something more functional.
...
8
votes
5answers
434 views
Custom list to avoid out of memory exceptions
The following class is a helper to avoid OutOfMemoryException exceptions being thrown when the list is to large so that it is added onto the large objects heap. To ...
3
votes
1answer
83 views
